2.1 Mild to Moderate Ulcerative Colitis

The recommended dosage for the induction of remission in adult patients with active, mild to moderate ulcerative colitis is 9 mg taken orally once daily in the morning with or without food for up to 8 weeks. Budesonide extended-release tablets should be swallowed whole and not chewed, crushed or broken.

2.2 CYP3A4 Inhibitors

If concomitant administration with ketoconazole, or any other CYP3A4 inhibitor, is indicated, patients should be closely monitored for increased signs and/or symptoms of hypercorticism. Avoid grapefruit juice, which is known to inhibit CYP3A4, when taking budesonide extended-release tablets. In these cases, discontinuation of budesonide extended-release tablets or the CYP3A4 inhibitor should be considered [see Drug Interactions (7) and Clinical Pharmacology (12.3)].

5.1 Hypercorticism and Adrenal Axis Suppression

Systemic effects such as hypercorticism and adrenal suppression may occur with use of corticosteroids, including budesonide extended-release tablets. Monitor patients for signs and symptoms of hypercorticism and adrenal axis suppression during treatment with budesonide extended-release tablets.

Patients with moderate to severe liver disease should be monitored for increased signs and/or symptoms of hypercorticism. Discontinuing the use of budesonide extended-release tablets should be considered in these patients [see Use in Specific Populations (8.6)].

Glucocorticosteroids, including budesonide extended-release tablets, can reduce the response of the hypothalamus-pituitary-adrenal (HPA) axis to stress. In situations where patients are subject to surgery or other stress situations, supplementation with a systemic glucocorticosteroid is recommended.

5.2 Transferring Patients from Systemic Glucocorticosteroid Therapy

Care is needed in patients who are transferred from glucocorticosteroid treatment with higher systemic effects to glucocorticosteroids with lower systemic effects, such as budesonide extended-release tablets, since symptoms attributed to withdrawal of steroid therapy, including those of acute adrenal suppression or benign intracranial hypertension, may develop. Adrenocortical function monitoring may be required in these patients, and the dose of glucocorticosteroid treatment with high systemic effects should be reduced cautiously.

Replacement of systemic glucocorticosteroids with budesonide extended-release tablets may unmask allergies (e.g., rhinitis and eczema), which were previously controlled by the systemic drug.

5.3 Immunosuppression and Increased Risk of Infection

Corticosteroids, including budesonide extended-release tablets, suppress the immune system and increase the risk of infection with any pathogen, including viral, bacterial, fungal, protozoan, or helminthic pathogens. Corticosteroids can:

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Reduce resistance to new infections

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Exacerbate existing infections

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Increase the risk of disseminated infections

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Increase the risk of reactivation or exacerbation of latent infections

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Mask some signs of infection

Corticosteroid-associated infections can be mild but can be severe and at times fatal. The rate of infectious complications increases with increasing corticosteroid dosages.

Monitor patients for the development of infection and consider discontinuation of budesonide extended-release tablets if the patient develops an infection while on treatment.

Tuberculosis

If budesonide extended-release tablets are used in patients with latent tuberculosis or tuberculin reactivity, reactivation of tuberculosis may occur. Closely monitor such patients for reactivation. During prolonged budesonide extended-release tablets therapy, patients with latent tuberculosis or tuberculin reactivity should receive chemoprophylaxis.

Varicella Zoster and Measles Viral Infections

Varicella and measles can have a serious or even fatal course in non-immune patients taking corticosteroids, including budesonide extended-release tablets. In corticosteroid-treated patients who have not had these diseases or are non-immune, particular care should be taken to avoid exposure to varicella and measles:

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If a budesonide extended-release tablets-treated patient is exposed to varicella, prophylaxis with varicella zoster immune globulin may be indicated. If varicella develops, treatment with antiviral agents may be considered.

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If a budesonide extended-release tablets -treated patient is exposed to measles, prophylaxis with immunoglobulin may be indicated.

Hepatitis B Virus Reactivation

Hepatitis B virus reactivation can occur in patients who are hepatitis B carriers treated with immunosuppressive dosages of corticosteroids, including budesonide extended-release tablets. Reactivation can also occur infrequently in corticosteroid-treated patients who appear to have resolved hepatitis B infection.

Screen patients for hepatitis B infection before initiating immunosuppressive (e.g., prolonged) treatment with budesonide extended-release tablets. For patients who show evidence of hepatitis B infection, recommend consultation with physicians with expertise in managing hepatitis B regarding monitoring and consideration for hepatitis B antiviral therapy.

Fungal Infections

Corticosteroids, including budesonide extended-release tablets, may exacerbate systemic fungal infections; therefore, avoid budesonide extended-release tablets use in the presence of such infections. For patients on chronic budesonide extended-release tablets therapy who develop systemic fungal infections, budesonide extended-release tablets withdrawal or dosage reduction is recommended.

Amebiasis

Corticosteroids, including budesonide extended-release tablets, may activate latent amebiasis. Therefore, it is recommended that latent amebiasis or active amebiasis be ruled out before initiating budesonide extended-release tablets in patients who have spent time in the tropics or patients with unexplained diarrhea.

Strongyloides Infestation

Avoid budesonide extended-release tablets in patients with known or suspected Strongyloides (threadworm) infection. Corticosteroids-induced immunosuppression may lead to Strongyloides superinfection and dissemination with widespread larval migration, often accompanied by severe enterocolitis and potentially fatal gram-negative septicemia.

Cerebral Malaria

Avoid corticosteroids, including budesonide extended-release tablets, in patients with cerebral malaria.

5.4 Kaposi’s Sarcoma

Kaposi’s sarcoma has been reported to occur in patients receiving corticosteroid therapy, most often for chronic conditions. Discontinuation of corticosteroids may result in clinical improvement of Kaposi’s sarcoma.

5.5 Increased Systemic Glucocorticoid Susceptibility

Reduced liver function affects the elimination of glucocorticosteroids, and increased systemic availability of oral budesonide has been demonstrated in patients with liver cirrhosis [see Use in Specific Populations (8.6)].

5.6 Other Glucocorticosteroid Effects

Caution should be taken in patients with hypertension, diabetes mellitus, osteoporosis, peptic ulcer, glaucoma or cataracts, or with a family history of diabetes or glaucoma, or with any other condition where glucocorticosteroids may have unwanted effects.

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.

The safety of budesonide extended-release tablets has been evaluated in controlled and open-label clinical trials which enrolled a combined total of 1,105 patients with ulcerative colitis.

In two 8-week, placebo-controlled studies in patients with active disease (Study 1 and Study 2), a total of 255 patients received budesonide extended-release tablets 9 mg, 254 patients received budesonide extended-release tablets 6 mg, and 258 patients received placebo. They ranged in age from 18-77 years (mean = 43), 56% were male, and 75% were Caucasian. The most common adverse reactions were headache, nausea, decreased blood cortisol, upper abdominal pain, fatigue, flatulence, abdominal distension, acne, urinary tract infection, arthralgia, and constipation. The adverse reactions occurring in 2% or more of patients on therapy with budesonide extended-release tablets 9 mg are summarized in Table 1.

Of budesonide extended-release tablets 9 mg patients, a total of 15% discontinued treatment due to any adverse event (including adverse reactions) compared with 17% in the placebo group.

Table 2 summarizes the percentages of patients reporting glucocorticoid-related effects in the 2 placebo-controlled studies.

No clinically significant differences were observed with respect to the overall percentages of patients with any glucocorticoid-related effects between budesonide extended-release tablets and placebo after 8 weeks of induction therapy.

Study 3 was an open-label study evaluating budesonide extended-release tablets 9 mg once daily for 8 weeks in 60 patients who had previously completed an 8-week induction study (Study 1) but had not achieved remission. Among patients who took budesonide extended-release tablets 9 mg up to 16 weeks cumulatively across Study 1 and Study 3 combined, similar rates of adverse reactions and glucocorticoid-related effects were seen compared to those who took budesonide extended-release tablets 9 mg for 8 weeks in Study 1.

In Study 4, the safety of long-term treatment with budesonide extended-release tablets 6 mg was evaluated in a placebo-controlled 12-month maintenance study of 123 patients. Patients who had previously completed 8 weeks of therapy in any induction study (Study 1, 2, or 3) and were in remission were randomized to budesonide extended-release tablets 6 mg or placebo once daily for 12 months. In patients who took budesonide extended-release tablets 6 mg for up to 12 months, similar rates of adverse reactions were seen between placebo and budesonide extended-release tablets 6 mg. After up to 12 months of study treatment, 77% (27/35) of the patients in the budesonide extended-release tablets 6 mg and 74% (29/39) of the patients in the placebo treatment groups had normal bone density scans.

In Study 4, the glucocorticoid-related effects were similar in patients with up to 12 months of therapy with budesonide extended-release tablets 6 mg and placebo (Table 3).

6.2 Postmarketing Experience

In addition to adverse events reported from clinical trials, the following adverse reactions have been identified during post-approval use of oral budesonide. Because these 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. These events have been chosen for inclusion due to either their seriousness, frequency of reporting or causal connection to budesonide extended-release tablets, or a combination of these factors.

Gastrointestinal Disorders: diarrhea, rectal bleeding
General Disorders and Administrative Site Conditions: peripheral edema
Immune System Disorders: anaphylactic reactions
Musculoskeletal and Connective Tissue Disorders: muscle cramps/spasms
Nervous System Disorders: benign intracranial hypertension, dizziness
Psychiatric Disorders: mood swings
Skin and Subcutaneous Tissue Disorders: rash
Vascular Disorders: increased blood pressure

7.1 Interaction with CYP3A4 Inhibitors

Concomitant oral administration of ketoconazole (a known inhibitor of CYP3A4 activity in the liver and in the intestinal mucosa) caused an eight-fold increase of the systemic exposure to oral budesonide. If treatment with inhibitors of CYP3A4 activity (such as ketoconazole, itraconazole, ritonavir, indinavir, saquinavir, erythromycin) is indicated, discontinuation of budesonide extended-release tablets should be considered. After extensive intake of grapefruit juice (which inhibits CYP3A4 activity predominantly in the intestinal mucosa), the systemic exposure for oral budesonide increased about two times. Ingestion of grapefruit or grapefruit juice should be avoided in connection with budesonide extended-release tablets administration [see Dosage and Administration (2) and Clinical Pharmacology (12.3)].

7.2 Inhibitors of Gastric Acid Secretion

Since the dissolution of the coating of budesonide extended-release tablets is pH dependent, the release properties and uptake of the compound may be altered when budesonide extended-release tablets are used after treatment with gastric acid reducing agents (e.g., proton pump inhibitors (PPIs), H2 blockers and antacids).

8.1 Pregnancy

8.2 Lactation

8.4 Pediatric Use

Safety and effectiveness of budesonide extended-release tablets in pediatric patients have not been established. Glucocorticosteroids, such as budesonide extended-release tablets, may cause a reduction of growth velocity in pediatric patients.

8.5 Geriatric Use

Clinical studies of budesonide extended-release tablets did not include sufficient numbers of subjects aged 65 and older to determine whether they respond differently from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients. In general, budesonide extended-release tablets should be used cautiously in elderly patients due to the potential for decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.

8.6 Hepatic Impairment

Patients with moderate to severe liver disease should be monitored for increased signs and/or symptoms of hypercorticism. Discontinuing the use of budesonide extended-release tablets should be considered in these patients [see Warnings and Precautions (5.5)].

12.1 Mechanism of Action

Budesonide has a high topical glucocorticosteroid (GCS) activity and substantial first-pass elimination. The formulation contains budesonide in an extended-release tablet core. The tablet core is enteric coated to protect dissolution in gastric juice which delays budesonide release until exposure to a pH ≥ 7 in the small intestine. Upon disintegration of the coating, the core matrix provides extended release of budesonide in a time dependent manner.

12.2 Pharmacodynamics

Budesonide has a high glucocorticoid effect and a weak mineralocorticoid effect, and the affinity of budesonide to GCS receptors, which reflects the intrinsic potency of the drug, is about 200-fold that of cortisol and 15-fold that of prednisolone.

Treatment with systemically active GCS, including budesonide extended-release tablets, is associated with a suppression of endogenous cortisol concentrations and an impairment of the hypothalamus-pituitary-adrenal (HPA) axis function. Markers, indirect and direct, of this are cortisol levels in plasma or urine and response to ACTH stimulation.

In a study assessing the response to ACTH stimulation test in patients treated with budesonide extended-release tablets 9 mg once daily, the proportion of patients with abnormal response was 47% at 4 weeks and 79% at 8 weeks.

12.3 Pharmacokinetics

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility