2.1 Testing Prior to Initiation and During Treatment with Emtricitabine, Rilpivirine and Tenofovir Disoproxil Fumarate Tablets

Prior to or when initiating emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets, test patients for hepatitis B virus infection [see Warnings and Precautions (5.1)].

Prior to initiation of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets, and during treatment with emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets, on a clinically appropriate schedule, assess serum creatinine, estimated creatinine clearance, urine glucose and urine protein in all patients. In patients with chronic kidney disease, also assess serum phosphorus [see Warnings and Precautions (5.5)].

2.2 Recommended Dosage

Emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets are a three-drug fixed dose combination product containing 200 mg of emtricitabine (FTC), 25 mg of rilpivirine (RPV), and 300 mg of tenofovir disoproxil fumarate (TDF). The recommended dosage of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets in adult and pediatric patients weighing at least 35 kg is one tablet taken orally once daily with food [see Use in Specific Populations (8.4) and Clinical Pharmacology (12.3)].

2.3 Recommended Dosage During Pregnancy

For pregnant patients who are already on emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets prior to pregnancy and are virologically suppressed (HIV-1 RNA less than 50 copies per mL), one tablet of emtricitabine, rilpivirine and tenofovir disoproxil fumarate taken once daily may be continued. Lower exposures of rilpivirine, a component of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets, were observed during pregnancy, therefore viral load should be monitored closely [see Use in Specific Populations (8.1) and Clinical Pharmacology (12.3)].

2.4 Not Recommended in Patients with Moderate or Severe Renal Impairment

Emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets are not recommended in patients with moderate or severe renal impairment (estimated creatinine clearance below 50 mL per minute) [see Warnings and Precautions (5.5) and Use in Specific Populations (8.6)].

2.5 Recommended Dosage with Rifabutin Coadministration

If emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets are coadministered with rifabutin, take an additional 25 mg tablet of rilpivirine (Edurant®) with emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets once daily with a meal for the duration of the rifabutin coadministration [see Drug Interactions (7.6) and Clinical Pharmacology (12.3)].

5.1 Severe Acute Exacerbation of Hepatitis B in Patients Coinfected with HIV-1 and HBV

Test all patients with HIV-1 for the presence of chronic hepatitis B virus (HBV) before or when initiating antiretroviral therapy [see Dosage and Administration (2.1)].

Severe acute exacerbations of hepatitis B (e.g., liver decompensation and liver failure) have been reported in patients who are coinfected with HBV and HIV-1 and have discontinued products containing FTC and/or TDF, two of the components of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets. Patients coinfected with HIV-1 and HBV who discontinue emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets should be closely monitored with both clinical and laboratory follow-up for at least several months after stopping treatment with emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets. If appropriate, initiation of anti-hepatitis B therapy may be warranted, especially in patients with advanced liver disease or cirrhosis, since posttreatment exacerbation of hepatitis may lead to hepatic decompensation and liver failure.

5.2 Skin and Hypersensitivity Reactions

Severe skin and hypersensitivity reactions have been reported during the postmarketing experience, including cases of Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS) with RPV-containing regimens. While some skin reactions were accompanied by constitutional symptoms such as fever, other skin reactions were associated with organ dysfunctions, including elevations in hepatic serum biochemistries. During the Phase 3 clinical trials, treatment-related rashes with at least Grade 2 severity were reported in 1% of subjects receiving RPV plus FTC/TDF. Overall, most rashes were Grade 1 or 2 and occurred in the first four to six weeks of therapy [see Adverse Reactions (6.1 and 6.2)].

Discontinue emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets immediately if signs or symptoms of severe skin or hypersensitivity reactions develop, including but not limited to, severe rash or rash accompanied by fever, blisters, mucosal involvement, conjunctivitis, facial edema, angioedema, hepatitis, or eosinophilia. Clinical status including laboratory parameters should be monitored and appropriate therapy should be initiated.

5.3 Hepatotoxicity

Hepatic adverse events have been reported in patients receiving an RPV-containing regimen. Patients with underlying hepatitis B or C virus infection, or marked elevations in liver-associated tests prior to treatment, may be at increased risk for worsening or development of liver-associated test elevations with use of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets. A few cases of hepatic toxicity have been reported in adult patients receiving an RPV-containing regimen who had no pre-existing hepatic disease or other identifiable risk factors. Appropriate laboratory testing prior to initiating therapy and monitoring for hepatotoxicity during therapy with emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets is recommended in patients with underlying hepatic disease such as hepatitis B or C, or in patients with marked elevations in liver-associated tests prior to treatment initiation. Liver-associated test monitoring should also be considered for patients without pre-existing hepatic dysfunction or other risk factors.

5.4 Depressive Disorders

The adverse reaction depressive disorders (depressed mood, depression, dysphoria, major depression, mood altered, negative thoughts, suicide attempt, suicidal ideation) has been reported with RPV. Patients with severe depressive symptoms should seek immediate medical evaluation to assess the possibility that the symptoms are related to emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets, and if so, to determine whether the risks of continued therapy outweigh the benefits.

During the Phase 3 trials in adults (N=1368) through 96 weeks, the incidence of depressive disorders (regardless of causality, severity) reported among RPV (n=686) or efavirenz (EFV, n=682) was 9% and 8%, respectively. Most events were mild or moderate in severity. The incidence of Grades 3 and 4 depressive disorders (regardless of causality) was 1% for both RPV and EFV. The incidence of discontinuation due to depressive disorders among RPV or EFV was 1% in each arm. Suicidal ideation was reported in 4 subjects in each arm while suicide attempt was reported in 2 subjects in the RPV arm.

During the Phase 2 trial in pediatric subjects 12 to less than 18 years of age (N=36) receiving RPV through 48 weeks, the incidence of depressive disorders (regardless of causality, severity) was 19.4% (7/36). Most events were mild or moderate in severity. The incidence of Grade 3 and 4 depressive disorders (regardless of causality) was 5.6% (2/36). None of the subjects discontinued due to depressive disorders. Suicidal ideation and suicide attempt were reported in 1 subject.

5.5 New Onset or Worsening Renal Impairment

Renal impairment, including cases of acute renal failure and Fanconi syndrome (renal tubular injury with severe hypophosphatemia), has been reported with the use of TDF [see Adverse Reactions (6.2)].

Prior to initiation of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets, and during treatment with emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets, on a clinically appropriate schedule, assess serum creatinine, estimated creatinine clearance, urine glucose, and urine protein in all patients. In patients with chronic kidney disease, also assess serum phosphorus.

Emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets should be avoided with concurrent or recent use of a nephrotoxic agent (e.g., high-dose or multiple nonsteroidal anti-inflammatory drugs [NSAIDs]) [see Drug Interactions (7.4)]. Cases of acute renal failure after initiation of high-dose or multiple NSAIDs have been reported in HIV-infected patients with risk factors for renal dysfunction who appeared stable on TDF. Some patients required hospitalization and renal replacement therapy. Alternatives to NSAIDs should be considered, if needed, in patients at risk for renal dysfunction.

Persistent or worsening bone pain, pain in extremities, fractures, and/or muscular pain or weakness may be manifestations of proximal renal tubulopathy and should prompt an evaluation of renal function in at-risk patients.

Emtricitabine and TDF are principally eliminated by the kidney; however, RPV is not. Since emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets are a combination product and the dose of the individual components cannot be altered, emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets are not recommended in patients with estimated creatinine clearance below 50 mL per minute [see Use in Specific Populations (8.6)].

5.6 Bone Loss and Mineralization Defects

5.7 Risk of Adverse Reactions or Loss of Virologic Response Due to Drug Interactions

The concomitant use of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets and other drugs may result in potentially significant drug interactions, some of which may lead to [see Dosage and Administration (2.5), Contraindications (4), and Drug Interactions (7)]:

•

Loss of therapeutic effect of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets and possible development of resistance due to reduced exposure to RPV.

•

Possible clinically significant adverse reaction from greater exposures of components of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets.

In healthy subjects, 75 mg once daily and 300 mg once daily doses of RPV (3 times and 12 times the dose in emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets) have been shown to prolong the QTc interval of the electrocardiogram. Consider alternatives to emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets when coadministered with a drug that is known to have a risk of Torsade de Pointes [see Drug Interactions (7) and Clinical Pharmacology (12.2)].

See Table 4 for steps to prevent or manage these possible and known significant drug interactions, including dosing recommendations. Consider the potential for drug interactions prior to and during emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablet therapy and review concomitant medications during emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablet therapy.

5.8 Lactic Acidosis/Severe Hepatomegaly with Steatosis

Lactic acidosis and severe hepatomegaly with steatosis, including fatal cases, have been reported with the use of nucleoside analogs, including TDF and FTC, components of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets, alone or in combination with other antiretrovirals. Treatment with emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets should be suspended in any patient who develops clinical or laboratory findings suggestive of lactic acidosis or pronounced hepatotoxicity (which may include hepatomegaly and steatosis even in the absence of marked transaminase elevations).

5.9 Immune Reconstitution Syndrome

Immune reconstitution syndrome has been reported in patients treated with combination antiretroviral therapy, including the components of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets. During the initial phase of combination antiretroviral treatment, patients whose immune system responds may develop an inflammatory response to indolent or residual opportunistic infections (such as Mycobacterium avium infection, cytomegalovirus, Pneumocystis jirovecii pneumonia [PCP], or tuberculosis), which may necessitate further evaluation and treatment.

Autoimmune disorders (such as Graves’ disease, polymyositis, Guillain-Barré syndrome, and autoimmune hepatitis) have also been reported to occur in the setting of immune reconstitution; however, the time to onset is more variable and can occur many months after initiation of treatment.

6.1 Clinical Trials Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.

6.2 Postmarketing Experience

The following adverse reactions have been identified during postmarketing experience in patients receiving RPV- or TDF-containing regimens. Because postmarketing reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.

Emtricitabine, Rilpivirine and Tenofovir Disoproxil Fumarate Tablets:

Metabolism and Nutrition Disorders:
weight increased

Skin and Subcutaneous Tissue Disorders
severe skin and hypersensitivity reactions including DRESS (Drug Reaction with Eosinophilia and Systemic Symptoms)

Rilpivirine:

Renal and Urinary Disorders:
nephrotic syndrome

Emtricitabine:

No postmarketing adverse reactions have been identified for inclusion in this section.

Tenofovir DF:

Immune System Disorders
allergic reaction, including angioedema

Metabolism and Nutrition Disorders
lactic acidosis, hypokalemia, hypophosphatemia

Respiratory, Thoracic, and Mediastinal Disorders
dyspnea

Gastrointestinal Disorders
pancreatitis, increased amylase, abdominal pain

Hepatobiliary Disorders
hepatic steatosis, hepatitis, increased liver enzymes (most commonly AST, ALT, gamma GT)

Skin and Subcutaneous Tissue Disorders
rash

Musculoskeletal and Connective Tissue Disorders
rhabdomyolysis, osteomalacia (manifested as bone pain and which may contribute to fractures), muscular weakness, myopathy

Renal and Urinary Disorders
acute renal failure, renal failure, acute tubular necrosis, Fanconi syndrome, proximal renal tubulopathy, interstitial nephritis (including acute cases), nephrogenic diabetes insipidus, renal insufficiency, increased creatinine, proteinuria, polyuria

General Disorders and Administration Site Conditions
asthenia

The following adverse reactions, listed under the body system headings above, may occur as a consequence of proximal renal tubulopathy: rhabdomyolysis, osteomalacia, hypokalemia, muscular weakness, myopathy, hypophosphatemia.

7.1 Not Recommended with Other Antiretroviral Medications

Because emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets are a complete regimen, coadministration with other antiretroviral medications for the treatment of HIV-1 infection is not recommended. Comprehensive information regarding potential drug-drug interactions with other antiretroviral medications is not provided.

This section describes clinically relevant drug interactions with emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets. Drug interaction studies were conducted with the components of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets (FTC, RPV, and TDF as single agents) or with emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets as a combination product [see Dosage and Administration (2), Contraindications (4), and Clinical Pharmacology (12.3)].

7.2 Drugs Inducing or Inhibiting CYP3A Enzymes

Rilpivirine is primarily metabolized by cytochrome P450 (CYP) 3A, and drugs that induce or inhibit CYP3A may thus affect the clearance of RPV [see Contraindications (4), Warnings and Precautions (5.7), and Clinical Pharmacology (12.3)]. Coadministration of RPV and drugs that induce CYP3A may result in decreased plasma concentrations of RPV and loss of virologic response and possible resistance to RPV or to the class of NNRTIs. Coadministration of RPV and drugs that inhibit CYP3A may result in increased plasma concentrations of RPV.

7.3 Drugs Increasing Gastric pH

Coadministration of RPV with drugs that increase gastric pH may decrease plasma concentrations of RPV and loss of virologic response and possible resistance to RPV or to the class of NNRTIs. Use of RPV with proton pump inhibitors is contraindicated and use of RPV with H2-receptor antagonists requires staggered administration [see Contraindications (4) and Clinical Pharmacology (12.3)].

7.4 Drugs Affecting Renal Function

Because FTC and tenofovir are primarily eliminated by the kidneys through a combination of glomerular filtration and active tubular secretion, coadministration of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets with drugs that reduce renal function or compete for active tubular secretion may increase serum concentrations of FTC, tenofovir, and/or other renally eliminated drugs. Some examples of drugs that are eliminated by active tubular secretion include, but are not limited to, acyclovir, adefovir dipivoxil, cidofovir, ganciclovir, valacyclovir, valganciclovir, aminoglycosides (e.g., gentamicin), and high-dose or multiple NSAIDs [see Warnings and Precautions (5.5)].

7.5 QT Prolonging Drugs

There is limited information available on the potential for a pharmacodynamic interaction between RPV and drugs that prolong the QTc interval of the electrocardiogram. In a study of healthy subjects, 75 mg once daily and 300 mg once daily doses of RPV (3 times and 12 times the dose in emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets) have been shown to prolong the QTc interval of the electrocardiogram [see Warnings and Precautions (5.7) and Clinical Pharmacology (12.2)]. Consider alternatives to emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets when coadministered with a drug with a known risk of Torsade de Pointes.

7.6 Significant Drug Interactions

Important drug interaction information for emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets is summarized in Table 4. The drug interactions described are based on studies conducted with FTC, RPV, or TDF as individual medications or with emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets as a combination product, or are potential drug interactions [see Clinical Pharmacology (12.3), Tables 9–14]. For list of contraindicated drugs, [see Contraindications (4)].

7.7 Drugs with No Observed Interactions with Emtricitabine, Rilpivirine and Tenofovir Disoproxil Fumarate Tablets

No clinically significant drug interactions have been observed between FTC and the following medications: famciclovir, ledipasvir/sofosbuvir, sofosbuvir/velpatasvir, sofosbuvir/velpatasvir/voxilaprevir, or TDF.

No clinically significant drug interactions have been observed between TDF and the following medications: entecavir, methadone, oral contraceptives, ribavirin, sofosbuvir, or tacrolimus in studies conducted in healthy subjects.

No clinically significant drug interactions have been observed between RPV and the following medications: acetaminophen, atorvastatin, chlorzoxazone, ethinyl estradiol, ledipasvir/sofosbuvir, norethindrone, sildenafil, simeprevir, sofosbuvir, sofosbuvir/velpatasvir, sofosbuvir/velpatasvir/voxilaprevir, or TDF. RPV did not have a clinically significant effect on the pharmacokinetics of digoxin or metformin.

8.1 Pregnancy

8.2 Lactation

8.4 Pediatric Use

The safety and effectivness of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets as a complete regimen for the treatment of HIV-1 infection was established in pediatric subjects 12 years of age and older with body weight greater than or equal to 35 kg [see Dosage and Administration (2.2)]. Use of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets in this age group weighing at least 35 kg is supported by adequate and well-controlled studies of RPV + FTC + TDF in adults with HIV-1 infection as well as data from pediatric studies of the individual components of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets (RPV, FTC, and TDF) [see Clinical Pharmacology (12.3) and Clinical Studies (14.2)].

Emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets should only be administered to pediatric patients with a body weight greater than or equal to 35 kg. Because emtricitabine, rilpivirine and tenofovir disoproxil fumarate is a fixed-dose combination tablet, the dose of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets cannot be adjusted for patients of lower weight. Safety and effectiveness for emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets have not been established in pediatric patients weighing less than 35 kg [see Adverse Reactions (6.1) and Clinical Pharmacology (12.3)].

8.5 Geriatric Use

Clinical studies of FTC, RPV, or TDF did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. In general, dose selection for elderly patients should be cautious, keeping in mind the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy [see Clinical Pharmacology (12.3)].

8.6 Renal Impairment

Because emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets are a fixed-dose combination, and cannot be dose adjusted, they are not recommended in patients with moderate, severe, or end-stage renal impairment (estimated creatinine clearance below 50 mL per minute) or that require dialysis [see Warnings and Precautions (5.5) and Clinical Pharmacology (12.3)].

8.7 Hepatic Impairment

No dose adjustment of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets is required in patients with mild (Child-Pugh Class A) or moderate (Child-Pugh Class B) hepatic impairment. Emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets have not been studied in patients with severe hepatic impairment (Child-Pugh Class C) [see Clinical Pharmacology (12.3)].

12.1 Mechanism of Action

Emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets are a fixed-dose combination of the antiretroviral drugs FTC, RPV, and TDF [see Microbiology (12.4)].

12.2 Pharmacodynamics

12.3 Pharmacokinetics

Emtricitabine, Rilpivirine and Tenofovir Disoproxil Fumarate Tablets: Under fed conditions (total calorie content of the meal was approximately 400 kcal with approximately 13 grams of fat), RPV, FTC, and tenofovir exposures were similar when comparing emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets to EMTRIVA capsules (200 mg) plus Edurant tablets (25 mg) plus VIREAD tablets (300 mg) following single-dose administration to healthy subjects (N=34).

Single-dose administration of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets to healthy subjects under fasted conditions provided approximately 25% higher exposure of RPV compared to administration of EMTRIVA capsules (200 mg) plus Edurant tablets (25 mg) plus VIREAD tablets (300 mg), while exposures of FTC and tenofovir were comparable (N=15).

Absorption, Distribution, Metabolism, and Excretion

The pharmacokinetic properties of the components of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets are provided in Table 5. The PK parameters of RPV, FTC, and tenofovir are provided in Table 6.

Specific Populations

Geriatric Patients

The pharmacokinetics of FTC, RPV, and tenofovir have not been fully evaluated in the elderly (65 years of age and older) [see Use in Specific Populations (8.5)].

Pediatric Patient

Pediatric trials have not been conducted using emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets. Pediatric information is based on trials conducted with the individual components of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets [see Use in Specific Populations (8.4)].

Emtricitabine: The pharmacokinetics of FTC at steady state were determined in 27 HIV-1-infected pediatric subjects 13 to 17 years of age receiving a daily dose of 6 mg/kg up to a maximum dose of 240 mg oral solution or a 200 mg capsule; 26 of 27 subjects in this age group received the 200 mg FTC capsule. Mean (± SD) Cmax and AUC were 2.7 ± 0.9 µg/mL and 12.6 ± 5.4 µg•hr/mL, respectively. Exposures achieved in pediatric subjects 12 to less than 18 years of age were similar to those achieved in adults receiving a once daily dose of 200 mg.

Rilpivirine: The pharmacokinetics of RPV in antiretroviral treatment-naïve HIV-1-infected pediatric subjects 12 to less than 18 years of age receiving RPV 25 mg once daily were comparable to those in treatment-naïve HIV-1-infected adults receiving RPV 25 mg once daily (See Table 7). There was no clinically significant impact of body weight on RPV pharmacokinetics in pediatric subjects in trial C213 (33 to 93 kg).

Tenofovir DF: Steady-state pharmacokinetics of tenofovir were evaluated in 8 HIV-1-infected pediatric subjects (12 to less than 18 years). Mean (± SD) Cmax and AUCtau are 0.38 ± 0.13 µg/mL and 3.39 ± 1.22 µg•hr/mL, respectively. Tenofovir exposure achieved in these pediatric subjects receiving oral daily doses of TDF 300 mg was similar to exposures achieved in adults receiving once-daily doses of TDF 300 mg.

Gender

No clinically relevant pharmacokinetic differences have been observed based on gender for FTC, RPV, and TDF.

Race

Emtricitabine: No pharmacokinetic differences due to race have been identified following the administration of FTC.

Rilpivirine: Population pharmacokinetic analysis of RPV in HIV-1-infected subjects indicated that race had no clinically relevant effect on the exposure to RPV.

Tenofovir DF: There were insufficient numbers from racial and ethnic groups other than Caucasian to adequately determine potential pharmacokinetic differences among these populations following the administration of TDF.

Patients with Renal Impairment

Emtricitabine and Tenofovir DF: The pharmacokinetics of FTC and TDF are altered in subjects with renal impairment. In subjects with creatinine clearance below 50 mL per minute or with end stage renal disease requiring dialysis, Cmax and AUC of FTC and tenofovir were increased [see Warnings and Precautions (5.5) and Use in Specific Populations (8.6)].

Rilpivirine: Population pharmacokinetic analysis indicated that RPV exposure was similar in HIV-1-infected subjects with mild renal impairment relative to HIV-1-infected subjects with normal renal function. There is limited or no information regarding the pharmacokinetics of RPV in patients with moderate or severe renal impairment or in patients with end-stage renal disease, and RPV concentrations may be increased due to alteration of drug absorption, distribution, and metabolism secondary to renal dysfunction [see Use in Specific Populations (8.6)].

Patients with Hepatic Impairment

Emtricitabine: The pharmacokinetics of FTC have not been studied in subjects with hepatic impairment; however, FTC is not significantly metabolized by liver enzymes, so the impact of liver impairment should be limited.

Rilpivirine: RPV is primarily metabolized and eliminated by the liver. In a study comparing 8 subjects with mild hepatic impairment (Child-Pugh score A) to 8 matched controls, and 8 subjects with moderate hepatic impairment (Child-Pugh score B) to 8 matched controls, the multiple dose exposure of RPV was 47% higher in subjects with mild hepatic impairment and 5% higher in subjects with moderate hepatic impairment. RPV has not been studied in subjects with severe hepatic impairment (Child-Pugh score C) [see Use in Specific Populations (8.7)].

Tenofovir DF: The pharmacokinetics of tenofovir following a 300 mg dose of TDF have been studied in non-HIV-infected subjects with moderate to severe hepatic impairment. There were no substantial alterations in tenofovir pharmacokinetics in subjects with hepatic impairment compared with unimpaired subjects.

Hepatitis B and/or Hepatitis C Virus Coinfection

The pharmacokinetics of FTC and TDF have not been fully evaluated in hepatitis B and/or C virus-coinfected patients. Population pharmacokinetic analysis indicated that hepatitis B and/or C virus coinfection had no clinically relevant effect on the exposure to RPV.

Pregnancy and Postpartum

The exposure (C0h and AUC24h) to total RPV after intake of RPV 25 mg once daily as part of an antiretroviral regimen was 30 to 40% lower during pregnancy (similar for the second and third trimester), compared with postpartum (see Table 8). However, the exposure during pregnancy was not significantly different from exposures obtained in Phase 3 trials of RPV-containing regimens. Based on the exposure-response relationship for RPV, this decrease is not considered clinically relevant in patients who are virologically suppressed. The protein binding of RPV was similar (>99%) during the second trimester, third trimester, and postpartum.

Drug Interaction Studies

Rilpivirine: RPV is primarily metabolized by cytochrome CYP3A, and drugs that induce or inhibit CYP3A may thus affect the clearance of RPV. Coadministration of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets and drugs that induce CYP3A may result in decreased plasma concentrations of RPV and loss of virologic response and possible resistance. Coadministration of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets and drugs that inhibit CYP3A may result in increased plasma concentrations of RPV. Coadministration of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets with drugs that increase gastric pH may result in decreased plasma concentrations of RPV and loss of virologic response and possible resistance to RPV and to the class of NNRTIs.

RPV at a dose of 25 mg once daily is not likely to have a clinically relevant effect on the exposure of medicinal products metabolized by CYP enzymes.

Emtricitabine and Tenofovir DF: In vitro and clinical pharmacokinetic drug-drug interaction studies have shown that the potential for CYP-mediated interactions involving FTC and tenofovir with other medicinal products is low.

FTC and tenofovir are primarily excreted by the kidneys by a combination of glomerular filtration and active tubular secretion. No drug-drug interactions due to competition for renal excretion have been observed; however, coadministration of FTC and TDF with drugs that are eliminated by active tubular secretion may increase concentrations of FTC, tenofovir, and/or the coadministered drug [see Drug Interactions (7.4, 7.6)].

Drugs that decrease renal function may increase concentrations of FTC and/or tenofovir.

The drug interaction studies described in Tables 9-14 were conducted with emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets (RPV/FTC/TDF) or the components of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets (RPV, FTC, or TDF) administered individually.

The effects of coadministration of other drugs on the AUC, Cmax, and Cmin values of RPV, FTC, and TDF are summarized in Tables 9, 10, and 11, respectively. The effect of coadministration of RPV, FTC, and TDF on the AUC, Cmax, and Cmin values of other drugs are summarized in Tables 12, 13, and 14, respectively. For information regarding clinical recommendations, see Drug Interactions (7).

No clinically significant drug interactions have been observed between FTC and indinavir, sofosbuvir/velpatasvir, sofosbuvir/velpatasvir/voxilaprevir, stavudine, and zidovudine.

No effect on the pharmacokinetic parameters of the following coadministered drugs was observed with TDF: methadone, oral contraceptives (ethinyl estradiol/norgestimate), or ribavirin.

12.4 Microbiology

Mechanism of Action

Emtricitabine: FTC, a synthetic nucleoside analog of cytidine, is phosphorylated by cellular enzymes to form emtricitabine 5′-triphosphate. Emtricitabine 5′-triphosphate inhibits the activity of the HIV-1 RT by competing with the natural substrate deoxycytidine 5′-triphosphate and by being incorporated into nascent viral DNA, which results in chain termination. Emtricitabine 5′-triphosphate is a weak inhibitor of mammalian DNA polymerase α, β, ε, and mitochondrial DNA polymerase γ.

Rilpivirine: RPV is a diarylpyrimidine non-nucleoside reverse transcriptase inhibitor of HIV-1 and inhibits HIV-1 replication by non-competitive inhibition of HIV-1 RT. RPV does not inhibit the human cellular DNA polymerases α, β, and mitochondrial DNA polymerase γ.

Tenofovir DF: TDF is an acyclic nucleoside phosphonate diester analog of adenosine monophosphate. TDF requires initial diester hydrolysis for conversion to tenofovir and subsequent phosphorylations by cellular enzymes to form tenofovir diphosphate. Tenofovir diphosphate inhibits the activity of HIV-1 RT by competing with the natural substrate deoxyadenosine 5′-triphosphate and, after incorporation into DNA, by DNA chain termination. Tenofovir diphosphate is a weak inhibitor of mammalian DNA polymerases α, β, and mitochondrial DNA polymerase γ.

Antiviral Activity

Emtricitabine, Rilpivirine, and TDF: The triple combination of FTC, RPV, and TDF was not antagonistic in cell culture.

Emtricitabine: The antiviral activity of FTC against laboratory and clinical isolates of HIV-1 was assessed in lymphoblastoid cell lines, the MAGI-CCR5 cell line, and peripheral blood mononuclear cells. The 50% effective concentration (EC50) values for FTC were in the range of 0.0013–0.64 μM. FTC displayed antiviral activity in cell culture against HIV-1 clades A, B, C, D, E, F, and G (EC50 values ranged from 0.007–0.075 μM) and showed strain specific activity against HIV-2 (EC50 values ranged from 0.007–1.5 μM). In drug combination studies of FTC with nucleoside reverse transcriptase inhibitors (abacavir, lamivudine, stavudine, tenofovir, zidovudine), non-nucleoside reverse transcriptase inhibitors (delavirdine, EFV, nevirapine, and RPV), and protease inhibitors (amprenavir, nelfinavir, ritonavir, saquinavir), no antagonistic effects were observed.

Rilpivirine: RPV exhibited activity against laboratory strains of wild-type HIV-1 in an acutely infected T-cell line with a median EC50 value for HIV-1IIIB of 0.73 nM. RPV demonstrated limited activity in cell culture against HIV-2 with a median EC50 value of 5220 nM (range 2510–10,830 nM). RPV demonstrated antiviral activity against a broad panel of HIV-1 group M (subtype A, B, C, D, F, G, H) primary isolates with EC50 values ranging from 0.07–1.01 nM and was less active against group O primary isolates with EC50 values ranging from 2.88–8.45 nM. The antiviral activity of RPV was not antagonistic when combined with the NNRTIs EFV, etravirine, or nevirapine; the N(t)RTIs abacavir, didanosine, FTC, lamivudine, stavudine, tenofovir, or zidovudine; the PIs amprenavir, atazanavir, darunavir, indinavir, lopinavir, nelfinavir, ritonavir, saquinavir, or tipranavir; the gp41 fusion inhibitor enfuvirtide; the CCR5 co-receptor antagonist maraviroc; or the integrase strand transfer inhibitor raltegravir.

Tenofovir DF: The antiviral activity of tenofovir against laboratory and clinical isolates of HIV-1 was assessed in lymphoblastoid cell lines, primary monocyte/macrophage cells, and peripheral blood lymphocytes. The EC50 values for tenofovir were in the range of 0.04–8.5 μM. Tenofovir displayed antiviral activity in cell culture against HIV-1 clades A, B, C, D, E, F, G, and O (EC50 values ranged from 0.5–2.2 μM) and showed strain specific activity against HIV-2 (EC50 values ranged from 1.6 μM–5.5 μM). In drug combination studies of tenofovir with NRTIs (abacavir, didanosine, FTC, lamivudine, stavudine, and zidovudine), NNRTIs (delavirdine, EFV, nevirapine, and RPV), and PIs (amprenavir, indinavir, nelfinavir, ritonavir, saquinavir), no antagonistic effects were observed.

Resistance

In Cell Culture

Emtricitabine and Tenofovir DF: HIV-1 isolates with reduced susceptibility to FTC or tenofovir have been selected in cell culture. Reduced susceptibility to FTC was associated with M184V/I substitutions in HIV-1 RT. HIV-1 isolates selected by tenofovir expressed a K65R substitution in HIV-1 RT and showed a 2–4 fold reduction in susceptibility to tenofovir. In addition, a K70E substitution in HIV-1 RT has been selected by tenofovir and results in low-level reduced susceptibility to abacavir, FTC, lamivudine, and tenofovir.

Rilpivirine: RPV-resistant strains were selected in cell culture starting from wild-type HIV-1 of different origins and subtypes as well as NNRTI-resistant HIV-1. The frequently observed amino acid substitutions that emerged and conferred decreased phenotypic susceptibility to RPV included: L100I, K101E, V106I and A, V108I, E138K and G, Q, R, V179F and I, Y181C and I, V189I, G190E, H221Y, F227C, and M230I and L.

In HIV-1-Infected Adult Subjects With No Antiretroviral Treatment History

In the Week 96 pooled resistance analysis for adult subjects receiving RPV or EFV in combination with FTC/TDF in the Phase 3 clinical trials C209 and C215, the emergence of resistance was greater among subjects’ viruses in the RPV + FTC/TDF arm compared to the EFV + FTC/TDF arm and was dependent on baseline viral load. In the pooled resistance analysis, 61% (47/77) of the subjects who qualified for resistance analysis (resistance analysis subjects) in the RPV + FTC/TDF arm had virus with genotypic and/or phenotypic resistance to RPV compared to 42% (18/43) of the resistance analysis subjects in the EFV + FTC/TDF arm who had genotypic and/or phenotypic resistance to EFV. Moreover, genotypic and/or phenotypic resistance to FTC or tenofovir emerged in viruses from 57% (44/77) of the resistance analysis subjects in the RPV arm compared to 26% (11/43) in the EFV arm.

Emerging NNRTI substitutions in the RPV resistance analysis of subjects’ viruses included V90I, K101E/P/T, E138K/A/Q/G, V179I/L, Y181C/I, V189I, H221Y, F227C/L, and M230L, which were associated with an RPV phenotypic fold change range of 2.6–621. The E138K substitution emerged most frequently during RPV treatment, commonly in combination with the M184I substitution. The FTC and lamivudine resistance-associated substitutions M184I or V and NRTI resistance-associated substitutions (K65R/N, A62V, D67N/G, K70E, Y115F, K219E/R) emerged more frequently in the RPV resistance analysis subjects than in EFV resistance analysis subjects (See Table 15).

NNRTI- and NRTI-resistance substitutions emerged less frequently in the resistance analysis of viruses from subjects with baseline viral loads of ≤ 100,000 copies/mL compared to viruses from subjects with baseline viral loads of > 100,000 copies/mL: 23% (10/44) compared to 77% (34/44) of NNRTI-resistance substitutions and 20% (9/44) compared to 80% (35/44) of NRTI-resistance substitutions. This difference was also observed for the individual FTC/lamivudine and tenofovir resistance substitutions: 22% (9/41) compared to 78% (32/41) for M184I/V and 0% (0/8) compared to 100% (8/8) for K65R/N. Additionally, NNRTI and/or NRTI-resistance substitutions emerged less frequently in the resistance analysis of the viruses from subjects with baseline CD4+ cell counts ≥ 200 cells/mm3 compared to the viruses from subjects with baseline CD4+ cell counts < 200 cells/mm3: 32% (14/44) compared to 68% (30/44) of NNRTI-resistance substitutions and 27% (12/44) compared to 73% (32/44) of NRTI-resistance substitutions.

In Virologically-Suppressed HIV-1-Infected Adult Subjects

Study 106: Through Week 48, 4 subjects who switched to emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets (4 of 469 subjects, 0.9%) and 1 subject who maintained their ritonavir-boosted protease inhibitor-based regimen (1 of 159 subjects, 0.6%) developed genotypic and/or phenotypic resistance to a study drug. All 4 of the subjects who had resistance emergence on emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets had evidence of FTC resistance and 3 of the subjects had evidence of RPV resistance.

Cross Resistance

Rilpivirine, Emtricitabine, and Tenofovir DF:

In Cell Culture

No significant cross-resistance has been demonstrated between RPV-resistant HIV-1 variants and FTC or tenofovir, or between FTC- or tenofovir-resistant variants and RPV.

Rilpivirine:

Site-Directed NNRTI Mutant Virus

Cross-resistance has been observed among NNRTIs. The single NNRTI substitutions K101P, Y181I, and Y181V conferred 52-fold, 15-fold, and 12-fold decreased susceptibility to RPV, respectively. The combination of E138K and M184I showed 6.7-fold reduced susceptibility to RPV compared to 2.8-fold for E138K alone. The K103N substitution did not show reduced susceptibility to RPV by itself. However, the combination of K103N and L100I resulted in a 7-fold reduced susceptibility to RPV. In another study, the Y188L substitution resulted in a reduced susceptibility to RPV of 9-fold for clinical isolates and 6-fold for site-directed mutants. Combinations of 2 or 3 NNRTI resistance-associated substitutions gave decreased susceptibility to RPV (fold change range of 3.7–554) in 38% and 66% of mutants, respectively.

In HIV-1-Infected Adult Subjects with No Antiretroviral Treatment History

Considering all available cell culture and clinical data, any of the following amino acid substitutions, when present at baseline, are likely to decrease the antiviral activity of RPV: K101E, K101P, E138A, E138G, E138K, E138R, E138Q, V179L, Y181C, Y181I, Y181V, Y188L, H221Y, F227C, M230I, M230L, and the combination of L100I+K103N.

Cross-resistance to EFV, etravirine, and/or nevirapine is likely after virologic failure and development of RPV resistance. In a pooled 96-week analysis for adult subjects receiving RPV in combination with FTC/TDF in the Phase 3 clinical trials TMC278-C209 and TMC278-C215, 43 of the 70 (61%) RPV resistance analysis subjects with postbaseline resistance data had virus with decreased susceptibility to RPV (≥2.5-fold change). Of these, 84% (n=36/43) were resistant to EFV (≥3.3-fold change), 88% (n=38/43) were resistant to etravirine (≥ 3.2-fold change), and 60% (n=26/43) were resistant to nevirapine (≥6-fold change). In the EFV arm, 3 of the 15 (20%) EFV resistance analysis subjects had viruses with resistance to etravirine and RPV, and 93% (14/15) had resistance to nevirapine. Virus from subjects experiencing virologic failure on RPV in combination with FTC/TDF developed more NNRTI resistance-associated substitutions conferring more cross-resistance to the NNRTI class and had a higher likelihood of cross-resistance to all NNRTIs in the class than subjects who failed on EFV.

Emtricitabine: FTC-resistant isolates (M184V/I) were cross-resistant to lamivudine but retained susceptibility in cell culture to didanosine, stavudine, tenofovir, zidovudine, and NNRTIs (delavirdine, EFV, nevirapine, and RPV). HIV-1 isolates containing the K65R substitution, selected in vivo by abacavir, didanosine, and tenofovir, demonstrated reduced susceptibility to inhibition by FTC. Viruses harboring substitutions conferring reduced susceptibility to stavudine and zidovudine (M41L, D67N, K70R, L210W, T215Y/F, K219Q/E), or didanosine (L74V), remained sensitive to FTC. HIV-1 containing the substitutions associated with NNRTI resistance K103N or RPV-associated substitutions were susceptible to FTC.

Tenofovir DF: The K65R and K70E substitutions selected by tenofovir are also selected in some HIV-1-infected patients treated with abacavir or didanosine. HIV-1 isolates with the K65R and K70E substitutions also showed reduced susceptibility to FTC and lamivudine. Therefore, cross-resistance among these NRTIs may occur in patients whose virus harbors the K65R substitution. HIV-1 isolates from patients (N=20) whose HIV-1 expressed a mean of 3 zidovudine-associated RT amino acid substitutions (M41L, D67N, K70R, L210W, T215Y/F, or K219Q/E/N) showed a 3.1-fold decrease in the susceptibility to tenofovir.

Subjects whose virus expressed an L74V substitution without zidovudine resistance-associated substitutions (N=8) had reduced response to TDF. Limited data are available for patients whose virus expressed a Y115F substitution (N=3), Q151M substitution (N=2), or T69 insertion (N=4), all of whom had a reduced response.

HIV-1 containing the substitutions associated with NNRTI resistance K103N and Y181C, or RPV-associated substitutions, were susceptible to tenofovir.

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility

Emtricitabine: In long-term carcinogenicity studies of FTC, no drug-related increases in tumor incidence were found in mice at doses up to 750 mg per kg per day (26 times the human systemic exposure at the therapeutic dose of 200 mg per day) or in rats at doses up to 600 mg per kg per day (31 times the human systemic exposure at the therapeutic dose).

FTC was not genotoxic in the reverse mutation bacterial test (Ames test), or the mouse lymphoma or mouse micronucleus assays.

FTC did not affect fertility in male rats at approximately 140-fold or in male and female mice at approximately 60-fold higher exposures (AUC) than in humans given the recommended 200 mg daily dose. Fertility was normal in the offspring of mice exposed daily from before birth (in utero) through sexual maturity at daily exposures (AUC) of approximately 60-fold higher than human exposures at the recommended 200 mg daily dose.

Rilpivirine: RPV was evaluated for carcinogenic potential by oral gavage administration to mice and rats up to 104 weeks. Daily doses of 20, 60, and 160 mg per kg per day were administered to mice and doses of 40, 200, 500, and 1500 mg per kg per day were administered to rats. In rats, there were no drug-related neoplasms. In mice, RPV was positive for hepatocellular neoplasms in both males and females. The observed hepatocellular findings in mice may be rodent-specific. At the lowest tested doses in the carcinogenicity studies, the systemic exposures (based on AUC) to RPV were 21-fold (mice) and 3-fold (rats), relative to those observed in humans at the recommended dose (25 mg once daily).

RPV has tested negative in the absence and presence of a metabolic activation system, in the in vitro Ames reverse mutation assay and in vitro clastogenicity mouse lymphoma assay. RPV did not induce chromosomal damage in the in vivo micronucleus test in mice.

In a study conducted in rats, there were no effects on mating or fertility with RPV up to 400 mg per kg per day, a dose of RPV that showed maternal toxicity. This dose is associated with an exposure that is approximately 40 times higher than the exposure in humans at the recommended dose of 25 mg once daily.

Tenofovir DF: Long-term oral carcinogenicity studies of TDF in mice and rats were carried out at exposures up to approximately 16 times (mice) and 5 times (rats) those observed in humans at the therapeutic dose for HIV-1 infection. At the high dose in female mice, liver adenomas were increased at exposures 16 times that in humans. In rats, the study was negative for carcinogenic findings at exposures up to 5 times that observed in humans at the therapeutic dose.

Tenofovir DF was mutagenic in the in vitro mouse lymphoma assay and negative in an in vitro bacterial mutagenicity test (Ames test). In an in vivo mouse micronucleus assay, TDF was negative when administered to male mice.

There were no effects on fertility, mating performance, or early embryonic development when TDF was administered to male rats at a dose equivalent to 10 times the human dose based on body surface area comparisons for 28 days prior to mating and to female rats for 15 days prior to mating through day 7 of gestation. There was, however, an alteration of the estrous cycle in female rats.

13.2 Animal Toxicology and/or Pharmacology

Tenofovir DF: Tenofovir and TDF administered in toxicology studies to rats, dogs, and monkeys at exposures (based on AUCs) greater than or equal to 6-fold those observed in humans caused bone toxicity. In monkeys the bone toxicity was diagnosed as osteomalacia. Osteomalacia observed in monkeys appeared to be reversible upon dose reduction or discontinuation of tenofovir. In rats and dogs, the bone toxicity manifested as reduced bone mineral density. The mechanism(s) underlying bone toxicity is unknown.

Evidence of renal toxicity was noted in 4 animal species. Increases in serum creatinine, BUN, glycosuria, proteinuria, phosphaturia, and/or calciuria and decreases in serum phosphate were observed to varying degrees in these animals. These toxicities were noted at exposures (based on AUCs) 2–20 times higher than those observed in humans. The relationship of the renal abnormalities, particularly the phosphaturia, to the bone toxicity is not known.

14.1 Adult Subjects

In HIV-1-Infected Adult Subjects With No Antiretroviral Treatment History

The efficacy of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets is based on the analyses of 48-and 96-week data from two randomized, double-blind, controlled studies (Study C209 [ECHO] and TRUVADA® subset of Study C215 [THRIVE]) in treatment-naïve, HIV-1-infected subjects (N=1368). The studies are identical in design with the exception of the background regimen (BR). Subjects were randomized in a 1:1 ratio to receive either RPV 25 mg (N=686) once daily or EFV 600 mg (N=682) once daily in addition to a BR. In Study C209 (N=690), the BR was FTC/TDF. In Study C215 (N=678), the BR consisted of 2 NRTIs: FTC/TDF (60%, n=406), lamivudine/zidovudine (30%, n=204), or abacavir + lamivudine (10%, n=68).

For subjects who received FTC/TDF (N=1096) in studies C209 and C215, the mean age was 37 years (range 18–78), 78% were male, 62% were White, 24% were Black, and 11% were Asian. The mean baseline CD4+ cell count was 265 cells/mm3 (range 1–888) and 31% had CD4+ cell counts <200 cells/mm3. The median baseline plasma HIV-1 RNA was 5 log10 copies/mL (range 2–7). Subjects were stratified by baseline HIV-1 RNA. Fifty percent of subjects had baseline viral load ≤100,000 copies/mL, 39% of subjects had baseline viral load between 100,000 copies/mL to 500,000 copies/mL, and 11% of subjects had baseline viral load >500,000 copies/mL.

Treatment outcomes through 96 weeks for the subset of subjects receiving FTC/TDF in studies C209 and C215 (Table 16) are generally consistent with treatment outcomes for all participating subjects (presented in the prescribing information for Edurant). The incidence of virologic failure was higher in the RPV arm than the EFV arm at Week 96. Virologic failures and discontinuations due to adverse events mostly occurred in the first 48 weeks of treatment.

Based on the pooled data from studies C209 and C215, the mean CD4+ cell count increase from baseline at Week 96 was 226 cells/mm3 for RPV + FTC/TDF-treated subjects and 223 cells/mm3 for EFV + FTC/TDF-treated subjects.

In Virologically Suppressed HIV-1-Infected Adult Subjects

The efficacy and safety of switching from a ritonavir-boosted protease inhibitor in combination with two NRTIs to emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets was evaluated in Study 106, a randomized, open-label study in virologically suppressed HIV-1-infected adults. Subjects had to be on either their first or second antiretroviral regimen with no history of virologic failure, have no current or past history of resistance to any of the three components of emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets, and must have been suppressed (HIV-1 RNA <50 copies/mL) for at least 6 months prior to screening. Subjects were randomized in a 2:1 ratio to either switch to emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets at baseline (emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets arm, N=317), or stay on their baseline antiretroviral regimen for 24 weeks (SBR arm, N=159) and then switch to emtricitabine, rilpivirine and tenofovir disoproxil fumarate tablets for an additional 24 weeks (N=52). Subjects had a mean age of 42 years (range 19–73), 88% were male, 77% were White, 17% were Black, and 17% were Hispanic/Latino. The mean baseline CD4+ cell count was 584 cells/mm3 (range 42–1484). Randomization was stratified by use of TDF and/or lopinavir/ritonavir in the baseline regimen.

Treatment outcomes are presented in Table 17.

14.2 Pediatric Subjects

The pharmacokinetics, safety, and efficacy of RPV in combination with other antiretroviral agents was evaluated in a single-arm, open-label Phase 2 trial in antiretroviral treatment-naïve HIV-1-infected pediatric subjects 12 to less than 18 years of age and weighing at least 32 kg (TMC-C213). Thirty-six (36) subjects were enrolled with a median age of 14.5 years (range 12 to 17 years), and were 55.6% female, 88.9% Black, and 11.1% Asian. The majority of subjects (24/36) received RPV in combination with FTC and TDF. Of these 24 subjects, 20 had baseline HIV RNA ≤ 100,000 copies/mL. The baseline characteristics and efficacy outcomes at Week 48 are further described below for the 20 subjects.

The median baseline plasma HIV-1 RNA and CD4+ cell count were 49,550 (range 2060 to 92,600 copies/mL) and 437.5 cells/mm3 (range 123 to 983 cells/mm3), respectively. At Week 48, 80% (16/20) of the subjects had HIV RNA < 50 copies/mL, 15% (3/20) had HIV RNA ≥ 50 copies/mL, and one subject discontinued therapy prior to Week 48 and before reaching virologic suppression (HIV RNA < 50 copies/mL). At Week 48, the mean increase in CD4+ cell count from baseline was 225 cells/mm3.