Label: ALBUTEROL SULFATE HFA- albuterol sulfate aerosol, metered
- NDC Code(s): 66993-019-68
- Packager: Prasco Laboratories
- Category: HUMAN PRESCRIPTION DRUG LABEL
- DEA Schedule: None
- Marketing Status: New Drug Application Authorized Generic
Updated November 10, 2021
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HIGHLIGHTS OF PRESCRIBING INFORMATION
These highlights do not include all the information needed to use Albuterol Sulfate HFA safely and effectively. See full prescribing information for Albuterol Sulfate HFA.
Albuterol Sulfate HFA Inhalation Aerosol, for oral inhalation use
Initial U.S. Approval: 1981
INDICATIONS AND USAGE
Albuterol Sulfate HFA is a beta2-adrenergic agonist indicated for:
DOSAGE AND ADMINISTRATION
- For oral inhalation only. (2)
- Treatment or prevention of bronchospasm in adult and pediatric patients aged 4 years and older: 2 inhalations by oral inhalation every 4 to 6 hours. For some patients, 1 inhalation every 4 hours may be sufficient. (2.1)
- Prevention of exercise-induced bronchospasm in adult and pediatric patients aged 4 years and older: 2 inhalations by oral inhalation 15 to 30 minutes before exercise. (2.2)
- Priming information: Prime Albuterol Sulfate HFA before using for the first time, when the inhaler has not been used for more than 2 weeks, or when the inhaler has been dropped. To prime Albuterol Sulfate HFA, release 4 sprays into the air away from the face, shaking well before each spray. (2.3)
- Cleaning information: At least once a week, wash the actuator with warm water and let it air-dry completely. (2.3)
DOSAGE FORMS AND STRENGTHS
Inhalation aerosol: 108 mcg albuterol sulfate (90 mcg albuterol base) per actuation. (3)
Hypersensitivity to any ingredient. (4)
WARNINGS AND PRECAUTIONS
- Life-threatening paradoxical bronchospasm may occur. Discontinue Albuterol Sulfate HFA immediately and institute alternative therapy. (5.1)
- Need for more doses of Albuterol Sulfate HFA than usual may be a sign of deterioration of asthma and requires reevaluation of treatment. (5.2)
- Albuterol Sulfate HFA is not a substitute for corticosteroids. (5.3)
- Cardiovascular effects may occur. Use with caution in patients sensitive to sympathomimetic drugs and patients with cardiovascular or convulsive disorders. (5.4, 5.7)
- Excessive use may be fatal. Do not exceed recommended dose. (5.5)
- Immediate hypersensitivity reactions may occur. Discontinue Albuterol Sulfate HFA immediately. (5.6)
- Hypokalemia and changes in blood glucose may occur. (5.7, 5.8)
Most common adverse reactions (incidence ≥3%) are throat irritation, viral respiratory infections, upper respiratory inflammation, cough, and musculoskeletal pain. (6.1)
To report SUSPECTED ADVERSE REACTIONS, contact Prasco Laboratories at 1-866-525-0688 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
- Beta-blockers: Use with caution. May block bronchodilatory effects of beta-agonists and produce severe bronchospasm. (7.1)
- Diuretics: Use with caution. Electrocardiographic changes and/or hypokalemia associated with non–potassium-sparing diuretics may worsen with concomitant beta-agonists. (7.2)
- Digoxin: May decrease serum digoxin levels. Consider monitoring digoxin levels. (7.3)
- Monoamine oxidase inhibitors and tricyclic antidepressants: Use with extreme caution. May potentiate effect of albuterol on vascular system. (7.4)
See 17 for PATIENT COUNSELING INFORMATION and FDA-approved patient labeling.
Table of Contents
FULL PRESCRIBING INFORMATION: CONTENTS*
- Sections or subsections omitted from the full prescribing information are not listed.
1 INDICATIONS AND USAGE
Albuterol Sulfate HFA Inhalation Aerosol is indicated for the treatment or prevention of bronchospasm in adult and pediatric patients aged 4 years and older with reversible obstructive airway disease.
2 DOSAGE AND ADMINISTRATION
2.1 Recommended Dosage for Bronchospasm (Acute Episodes or Symptoms Associated with Bronchospasm)
Adult and pediatric patients aged 4 years and older: 2 inhalations by oral inhalation repeated every 4 to 6 hours; in some patients, 1 inhalation every 4 hours may be sufficient. More frequent administration or a greater number of inhalations is not recommended.
2.2 Recommended Dosage for Prevention of Exercise-Induced Bronchospasm
Adult and pediatric patients aged 4 years and older: 2 inhalations by oral inhalation 15 to 30 minutes before exercise.
2.3 Administration Information
Albuterol Sulfate HFA should be administered by the orally inhaled route only.
Priming Albuterol Sulfate HFA is essential to ensure appropriate albuterol content in each actuation. Prime Albuterol Sulfate HFA before using for the first time, when the inhaler has not been used for more than 2 weeks, or when the inhaler has been dropped. To prime Albuterol Sulfate HFA, release 4 sprays into the air away from the face, shaking well before each spray. Avoid spraying in eyes.
To ensure proper dosing and to prevent actuator orifice blockage, wash the actuator with warm water and let it air-dry completely at least once a week.
- 3 DOSAGE FORMS AND STRENGTHS
- 4 CONTRAINDICATIONS
5 WARNINGS AND PRECAUTIONS
5.1 Paradoxical Bronchospasm
Albuterol Sulfate HFA can produce paradoxical bronchospasm, which may be life threatening. If paradoxical bronchospasm occurs following dosing with Albuterol Sulfate HFA, it should be discontinued immediately and alternative therapy should be instituted. It should be recognized that paradoxical bronchospasm, when associated with inhaled formulations, frequently occurs with the first use of a new canister.
5.2 Deterioration of Asthma
Asthma may deteriorate acutely over a period of hours or chronically over several days or longer. If the patient needs more doses of Albuterol Sulfate HFA than usual, this may be a marker of destabilization of asthma and requires reevaluation of the patient and treatment regimen, giving special consideration to the possible need for anti-inflammatory treatment, e.g., corticosteroids.
5.3 Use of Anti-inflammatory Agents
The use of beta-adrenergic agonist bronchodilators alone may not be adequate to control asthma in many patients. Early consideration should be given to adding anti-inflammatory agents, e.g., corticosteroids, to the therapeutic regimen.
5.4 Cardiovascular Effects
Albuterol Sulfate HFA, like all other beta2-adrenergic agonists, can produce clinically significant cardiovascular effects in some patients such as changes in pulse rate or blood pressure. If such effects occur, Albuterol Sulfate HFA may need to be discontinued. In addition, beta-agonists have been reported to produce electrocardiogram (ECG) changes, such as flattening of the T wave, prolongation of the QTc interval, and ST segment depression. The clinical relevance of these findings is unknown. Therefore, Albuterol Sulfate HFA, like all other sympathomimetic amines, should be used with caution in patients with underlying cardiovascular disorders, especially coronary insufficiency, cardiac arrhythmias, and hypertension.
5.5 Do Not Exceed Recommended Dose
Fatalities have been reported in association with excessive use of inhaled sympathomimetic drugs in patients with asthma. The exact cause of death is unknown, but cardiac arrest following an unexpected development of a severe acute asthmatic crisis and subsequent hypoxia is suspected.
5.6 Hypersensitivity Reactions, including Anaphylaxis
Immediate hypersensitivity reactions (e.g., urticaria, angioedema, rash, bronchospasm, hypotension), including anaphylaxis, may occur after administration of Albuterol Sulfate HFA [see Contraindications (4)].
5.7 Coexisting Conditions
Albuterol Sulfate HFA, like other sympathomimetic amines, should be used with caution in patients with convulsive disorders, hyperthyroidism, or diabetes mellitus and in patients who are unusually responsive to sympathomimetic amines. Large doses of intravenous albuterol have been reported to aggravate preexisting diabetes mellitus and ketoacidosis.
Beta-adrenergic agonist medicines may produce significant hypokalemia in some patients, possibly through intracellular shunting, which has the potential to produce adverse cardiovascular effects [see Clinical Pharmacology (12.1)]. The decrease in serum potassium is usually transient, not requiring supplementation.
6 ADVERSE REACTIONS
The following clinically significant adverse reactions are described elsewhere in the labeling:
- Paradoxical bronchospasm [see Warnings and Precautions (5.1)]
- Cardiovascular effects [see Warnings and Precautions (5.4)]
- Hypersensitivity reactions, including anaphylaxis [see Warnings and Precautions (5.6)]
- Hypokalemia [see Warnings and Precautions (5.8)]
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 with rates in the clinical trials of another drug and may not reflect the rates observed in practice.
The safety data described below reflects exposure to albuterol sulfate HFA in 248 subjects treated with albuterol sulfate HFA in 3 placebo-controlled clinical trials of 2 to 12 weeks’ duration. The data from adults and adolescents is based upon 2 clinical trials in which 202 subjects with asthma aged 12 years and older were treated with albuterol sulfate HFA 2 inhalations 4 times daily for 12 weeks’ duration. The adult/adolescent population was 92 female, 110 male and 163 white, 19 black, 18 Hispanic, 2 other. The data from pediatric subjects are based upon 1 clinical trial in which 46 subjects with asthma aged 4 to 11 years were treated with albuterol sulfate HFA 2 inhalations 4 times daily for 2 weeks’ duration. The population was 21 female, 25 male and 25 white, 17 black, 3 Hispanic, 1 other.
Adult and Adolescent Subjects Aged 12 Years and Older
The two 12-week, randomized, double-blind trials in 610 adult and adolescent subjects with asthma that compared albuterol sulfate HFA, a CFC 11/12-propelled albuterol inhaler, and an HFA-134a placebo inhaler. Overall, the incidence and nature of the adverse reactions reported for albuterol sulfate HFA and a CFC 11/12‑propelled albuterol inhaler were comparable. Table 1 lists the incidence of all adverse reactions (whether considered by the investigator to be related or unrelated to drug) from these trials that occurred at a rate of ≥3% in the group treated with albuterol sulfate HFA and more frequently in the group treated with albuterol sulfate HFA than in the HFA-134a placebo inhaler group.
Table 1. Adverse Reactions with Albuterol Sulfate HFA with ≥3% Incidence and More Common than Placebo in Adult and Adolescent Subjects
Percent of Subjects
Albuterol Sulfate HFA
(n = 202)
(n = 207)
(n = 201)
Ear, nose, and throat
Upper respiratory inflammation
Viral respiratory infections
Adverse reactions reported by <3% of the adult and adolescent subjects receiving albuterol sulfate HFA and by a greater proportion of subjects receiving albuterol sulfate HFA than receiving HFA-134a placebo inhaler and that have the potential to be related to albuterol sulfate HFA include diarrhea, laryngitis, oropharyngeal edema, cough, lung disorders, tachycardia, and extrasystoles. Palpitations and dizziness have also been observed with albuterol sulfate HFA.
Pediatric Subjects Aged 4 to 11 Years
Results from the 2-week clinical trial in pediatric subjects with asthma aged 4 to 11 years showed that this pediatric population had an adverse reaction profile similar to that of the adult and adolescent populations.
Three trials have been conducted to evaluate the safety and efficacy of albuterol sulfate HFA in subjects between birth and 4 years of age. The results of these trials did not establish the efficacy of albuterol sulfate HFA in this age group [see Use in Specific Populations (8.4)]. Since the efficacy of albuterol sulfate HFA has not been demonstrated in children between birth and 48 months of age, the safety of albuterol sulfate HFA in this age-group cannot be established. However, the safety profile observed in the pediatric population younger than 4 years was comparable to that observed in the older pediatric subjects and in adults and adolescents. Where adverse reaction incidence rates were greater in subjects younger than 4 years compared with older subjects, the higher incidence rates were noted in all treatment arms, including placebo. These adverse reactions included upper respiratory tract infection, nasopharyngitis, pyrexia, and tachycardia.
6.2 Postmarketing Experience
In addition to adverse reactions reported from clinical trials, the following adverse reactions have been identified during postapproval use of albuterol sulfate. 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 albuterol or a combination of these factors.
Cases of paradoxical bronchospasm, hoarseness, arrhythmias (including atrial fibrillation, supraventricular tachycardia), and hypersensitivity reactions (including urticaria, angioedema, rash) have been reported after the use of albuterol sulfate HFA.
In addition, albuterol, like other sympathomimetic agents, can cause adverse reactions such as hypokalemia, hypertension, peripheral vasodilatation, angina, tremor, central nervous system stimulation, hyperactivity, sleeplessness, headache, muscle cramps, drying or irritation of the oropharynx, and metabolic acidosis.
7 DRUG INTERACTIONS
Other short-acting sympathomimetic aerosol bronchodilators should not be used concomitantly with albuterol. If additional adrenergic drugs are to be administered by any route, they should be used with caution to avoid deleterious cardiovascular effects.
7.1 Beta-Adrenergic Receptor Blocking Agents
Beta-blockers not only block the pulmonary effect of beta-agonists, such as albuterol sulfate HFA, but may also produce severe bronchospasm in patients with asthma. Therefore, patients with asthma should not normally be treated with beta-blockers. However, under certain circumstances, there may be no acceptable alternatives to the use of beta-adrenergic blocking agents for these patients; cardioselective beta-blockers could be considered, although they should be administered with caution.
7.2 Non–Potassium-Sparing Diuretics
The ECG changes and/or hypokalemia that may result from the administration of non‑potassium-sparing diuretics (such as loop or thiazide diuretics) can be acutely worsened by beta-agonists, especially when the recommended dose of the beta-agonist is exceeded. Although the clinical significance of these effects is not known, caution is advised in the coadministration of Albuterol Sulfate HFA with non–potassium-sparing diuretics.
Mean decreases of 16% to 22% in serum digoxin levels were demonstrated after single-dose intravenous and oral administration of albuterol, respectively, to normal volunteers who had received digoxin for 10 days. The clinical relevance of these findings for patients with obstructive airway disease who are receiving inhaled albuterol and digoxin on a chronic basis is unclear. Nevertheless, it would be prudent to carefully evaluate the serum digoxin levels in patients who are currently receiving digoxin and albuterol.
7.4 Monoamine Oxidase Inhibitors and Tricyclic Antidepressants
Albuterol Sulfate HFA should be administered with extreme caution to patients being treated with monoamine oxidase inhibitors or tricyclic antidepressants, or within 2 weeks of discontinuation of such agents, because the action of albuterol on the vascular system may be potentiated.
8 USE IN SPECIFIC POPULATIONS
Pregnancy Exposure Registry
There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to asthma medications during pregnancy. For more information, contact the MotherToBaby Pregnancy Studies conducted by the Organization of Teratology Information Specialists at 1‑877-311-8972 or visit https://mothertobaby.org/ongoing-study/asthma/.
There are no randomized clinical studies of use of albuterol sulfate during pregnancy. Available data from epidemiological studies and postmarketing case reports of pregnancy outcomes following inhaled albuterol use do not consistently demonstrate a risk of major birth defects or miscarriage. There are, however, clinical considerations in pregnant women with asthma. (See Clinical Considerations.)
Administration of albuterol sulfate HFA to mice and rabbits during the period of organogenesis revealed evidence of adverse developmental outcomes (cleft palate in mice, delayed ossification in rabbits) at less than the maximum recommended human daily inhaled dose (MRHDID). (See Data.)
The estimated background risk of major birth defects and miscarriage for the indicated population(s) is unknown. In the U.S. general population, the estimated risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively.
Disease-Associated Maternal and/or Embryofetal Risk: In women with poorly or moderately controlled asthma, there is an increased risk of several perinatal adverse outcomes such as preeclampsia in the mother and prematurity, low birth weight, and small for gestational age in the neonate. Pregnant women with asthma should be closely monitored and medication adjusted as necessary to maintain optimal asthma control.
Labor or Delivery: Because of the potential for beta-agonist interference with uterine contractility, use of Albuterol Sulfate HFA during labor should be restricted to those patients in whom the benefits clearly outweigh the risk. Albuterol sulfate HFA has not been approved for the management of pre-term labor. Serious adverse reactions, including pulmonary edema, have been reported during or following treatment of premature labor with beta2-agonists, including albuterol.
Human Data: While available studies cannot definitively establish the absence of risk, published data from epidemiological studies and case reports have not consistently demonstrated an association with use of albuterol sulfate HFA during pregnancy and major birth defects, specific birth defects, or miscarriage. The available studies have methodologic limitations, including inconsistent comparator groups, definitions of outcomes, and assessment of disease impact.
Animal Data: In a study in pregnant mice, subcutaneously administered albuterol sulfate produced cleft palate formation in 5 of 111 (4.5%) fetuses at an exposure less than the MRHDID for adults (on a mg/m2 basis at a maternal dose of 0.25 mg/kg) and in 10 of 108 (9.3%) fetuses at approximately 9 times the MRHDID (on a mg/m2 basis at a maternal dose of 2.5 mg/kg). Cleft palate also occurred in 22 of 72 (30.5%) fetuses from females treated subcutaneously with isoproterenol, another beta2-agonist.
In a study in pregnant rabbits, orally administered albuterol sulfate produced cranioschisis in 7 of 19 fetuses (37%) at approximately 750 times the MRHDID (on a mg/m2 basis at a maternal dose of 50 mg/kg).
In a study in pregnant rabbits, an albuterol/HFA-134a formulation administered by inhalation produced enlargement of the frontal portion of the fetal fontanelles at approximately one third of the MRHDID on a mg/m2 basis.
A study in which pregnant rats were dosed with radiolabeled albuterol sulfate demonstrated that drug-related material is transferred from the maternal circulation to the fetus.
There are no available data on the presence of albuterol or the components of Albuterol Sulfate HFA in human milk, the effects on the breastfed child, or the effects on milk production. However, plasma levels of albuterol after inhaled therapeutic doses are low in humans, and if present in breast milk, are likely to be correspondingly low [see Clinical Pharmacology (12.3)]. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for Albuterol Sulfate HFA and any potential adverse effects on the breastfed child from Albuterol Sulfate HFA or from the underlying maternal condition.
8.4 Pediatric Use
The safety and effectiveness of albuterol sulfate HFA for treatment or prevention of bronchospasm and for prevention of exercised-induced bronchospasm in pediatric patients aged 4 years and older have been established. Use of albuterol sulfate HFA for this indication is supported by evidence from adequate and well-controlled studies of two 12-week clinical trials in subjects aged 12 years and older with asthma and one 2-week clinical trial in subjects aged 4 to 11 years with asthma [see Adverse Reactions (6.1), Clinical Studies (14.1)].
The safety and effectiveness of albuterol sulfate HFA in pediatric patients younger than 4 years have not been established. Three trials have been conducted to evaluate the safety and efficacy of albuterol sulfate HFA in subjects younger than 4 years and the findings are described below.
Two 4-week randomized, double-blind, placebo-controlled trials were conducted in 163 pediatric subjects aged from birth to 48 months with symptoms of bronchospasm associated with obstructive airway disease (presenting symptoms included: wheeze, cough, dyspnea, or chest tightness). Albuterol sulfate HFA or placebo HFA was delivered with either an AeroChamber Plus Valved Holding Chamber or an Optichamber Valved Holding Chamber with mask 3 times daily. In one trial, albuterol sulfate HFA 90 mcg (n = 26), albuterol sulfate HFA 180 mcg (n = 25), and placebo HFA (n = 26) were administered to children aged between 24 and 48 months. In the second trial, albuterol sulfate HFA 90 mcg (n = 29), albuterol sulfate HFA 180 mcg (n = 29), and placebo HFA (n = 28) were administered to children aged between birth and 24 months. Over the 4-week treatment period, there were no treatment differences in asthma symptom scores between the groups receiving albuterol sulfate HFA 90 mcg, albuterol sulfate HFA 180 mcg, and placebo in either trial.
In a third trial, albuterol sulfate HFA was evaluated in 87 pediatric subjects younger than 24 months for the treatment of acute wheezing. Albuterol sulfate HFA was delivered with an AeroChamber Plus Valved Holding Chamber in this trial. There were no significant differences in asthma symptom scores and mean change from baseline in an asthma symptom score between albuterol sulfate HFA 180 mcg and albuterol sulfate HFA 360 mcg.
In vitro dose characterization studies were performed to evaluate the delivery of albuterol sulfate HFA via holding chambers with attached masks. The studies were conducted with 2 different holding chambers with masks (small and medium size). The in vitro study data when simulating patient breathing suggest that the dose of albuterol sulfate HFA presented for inhalation via a valved holding chamber with mask will be comparable to the dose delivered in adults without a spacer and mask per kilogram of body weight (Table 2). However, clinical trials in children younger than 4 years described above suggest that either the optimal dose of albuterol sulfate HFA has not been defined in this age group or albuterol sulfate HFA is not effective in this age group. The safety and effectiveness of albuterol sulfate HFA administered with or without a spacer device in children younger than 4 years have not been demonstrated.
Table 2. In Vitro Medication Delivery through AeroChamber Plus Valved Holding Chamber with a Mask a Centers for Disease Control growth charts, developed by the National Center for Health Statistics in collaboration with the National Center for Chronic Disease Prevention and Health Promotion (2000). Ranges correspond to the average of the 50th percentile weight for boys and girls at the ages indicated.
b A single inhalation of albuterol sulfate HFA in a 70-kg adult without use of a valved holding chamber and mask delivers approximately 90 mcg, or 1.3 mcg/kg.
Flow Rate (L/min)
Holding Time (seconds)
Mean Medication Delivery through AeroChamber Plus (mcg/actuation)
Body Weight 50th Percentile (kg)a
Medication Delivered per Actuation (mcg/kg)b
6 to 12 Months
2 to 5 Years
2 to 5 Years
8.5 Geriatric Use
Clinical trials of albuterol sulfate HFA did not include sufficient numbers of subjects aged 65 years and older to determine whether older subjects respond differently than younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients. In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.
The expected signs and symptoms with overdosage of albuterol are those of excessive beta-adrenergic stimulation and/or occurrence or exaggeration of any of the signs and symptoms of beta-adrenergic stimulation (e.g., seizures, angina, hypertension or hypotension, tachycardia with rates up to 200 beats/min, arrhythmias, nervousness, headache, tremor, muscle cramps, dry mouth, palpitation, nausea, dizziness, fatigue, malaise, insomnia, hyperglycemia, hypokalemia, metabolic acidosis).
As with all inhaled sympathomimetic medicines, cardiac arrest and even death may be associated with an overdose of Albuterol Sulfate HFA Inhalation Aerosol.
Treatment consists of discontinuation of Albuterol Sulfate HFA together with appropriate symptomatic therapy. The judicious use of a cardioselective beta-receptor blocker may be considered, bearing in mind that such medication can produce bronchospasm. There is insufficient evidence to determine if dialysis is beneficial for overdosage of Albuterol Sulfate HFA.
The active component of Albuterol Sulfate HFA is albuterol sulfate, USP, the racemic form of albuterol and a relatively selective beta2-adrenergic bronchodilator. Albuterol sulfate has the chemical name α1-[(tert-butylamino)methyl]-4-hydroxy-m-xylene-α, α′-diol sulfate (2:1)(salt) and the following chemical structure:
Albuterol sulfate is a white crystalline powder with a molecular weight of 576.7, and the empirical formula is (C13H21NO3)2•H2SO4. It is soluble in water and slightly soluble in ethanol.
The World Health Organization recommended name for albuterol base is salbutamol.
Albuterol Sulfate HFA is a blue plastic inhaler with a blue cap containing a pressurized metered-dose aerosol canister fitted with a counter. Each canister contains a microcrystalline suspension of albuterol sulfate in propellant HFA‑134a (1,1,1,2‑tetrafluoroethane). It contains no other excipients.
After priming, each actuation of the inhaler delivers 120 mcg of albuterol sulfate, USP in 75 mg of suspension from the valve and 108 mcg of albuterol sulfate, USP from the mouthpiece (equivalent to 90 mcg of albuterol base from the mouthpiece).
Prime Albuterol Sulfate HFA before using for the first time, when the inhaler has not been used for more than 2 weeks, or when the inhaler has been dropped. To prime Albuterol Sulfate HFA, release 4 sprays into the air away from the face, shaking well before each spray. Avoid spraying in eyes.
12 CLINICAL PHARMACOLOGY
12.1 Mechanism of Action
In vitro studies and in vivo pharmacologic studies have demonstrated that albuterol has a preferential effect on beta2-adrenergic receptors compared with isoproterenol. Although beta2-adrenoceptors are the predominant adrenergic receptors in bronchial smooth muscle and beta1-adrenoceptors are the predominant receptors in the heart, there are also beta2-adrenoceptors in the human heart comprising 10% to 50% of the total beta-adrenoceptors. The precise function of these receptors has not been established, but their presence raises the possibility that even selective beta2-agonists may have cardiac effects.
Activation of beta2-adrenergic receptors on airway smooth muscle leads to the activation of adenyl cyclase and to an increase in the intracellular concentration of cyclic-3′,5′-adenosine monophosphate (cyclic AMP). This increase of cyclic AMP leads to the activation of protein kinase A, which inhibits the phosphorylation of myosin and lowers intracellular ionic calcium concentrations, resulting in relaxation. Albuterol relaxes the smooth muscles of all airways, from the trachea to the terminal bronchioles. Albuterol acts as a functional antagonist to relax the airway irrespective of the spasmogen involved, thus protecting against all bronchoconstrictor challenges. Increased cyclic AMP concentrations are also associated with the inhibition of release of mediators from mast cells in the airway.
Albuterol has been shown in most controlled clinical trials to have more effect on the respiratory tract, in the form of bronchial smooth muscle relaxation, than isoproterenol at comparable doses while producing fewer cardiovascular effects. Controlled clinical studies and other clinical experience have shown that inhaled albuterol, like other beta-adrenergic agonist drugs, can produce a significant cardiovascular effect in some patients, as measured by pulse rate, blood pressure, symptoms, and/or electrocardiographic changes [see Warnings and Precautions (5.4)].
The systemic levels of albuterol are low after inhalation of recommended doses. A trial conducted in 12 healthy male and female subjects using a higher dose (1,080 mcg of albuterol base) showed that mean peak plasma concentrations of approximately 3 ng/mL occurred after dosing when albuterol was delivered using propellant HFA-134a. The mean time to peak concentrations (Tmax) was delayed after administration of Albuterol Sulfate HFA (Tmax = 0.42 hours) as compared with CFC-propelled albuterol inhaler (Tmax = 0.17 hours). Apparent terminal plasma half-life of albuterol is approximately 4.6 hours. No further pharmacokinetic trials for albuterol sulfate HFA were conducted in neonates, children, or elderly subjects.
13 NONCLINICAL TOXICOLOGY
13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility
In a 2-year study in Sprague-Dawley rats, albuterol sulfate caused a dose-related increase in the incidence of benign leiomyomas of the mesovarium at and above dietary doses of 2 mg/kg (approximately 15 and 6 times the MRHDID for adults and children, respectively, on a mg/m2 basis). In another study this effect was blocked by the coadministration of propranolol, a non-selective beta-adrenergic antagonist. In an 18-month study in CD-1 mice, albuterol sulfate showed no evidence of tumorigenicity at dietary doses of up to 500 mg/kg (approximately 1,900 and 740 times the MRHDID for adults and children, respectively, on a mg/m2 basis). In a 22-month study in Golden hamsters, albuterol sulfate showed no evidence of tumorigenicity at dietary doses of up to 50 mg/kg (approximately 250 and 100 times the MRHDID for adults and children, respectively, on a mg/m2 basis).
Albuterol sulfate was not mutagenic in the Ames test or a mutation test in yeast. Albuterol sulfate was not clastogenic in a human peripheral lymphocyte assay or in an AH1 strain mouse micronucleus assay.
Fertility and reproductive performance in rats demonstrated no evidence of impaired fertility at oral doses up to 50 mg/kg (approximately 380 times the MRHDID for adults on a mg/m2 basis).
13.2 Animal Toxicology and/or Pharmacology
Intravenous studies in rats with albuterol sulfate have demonstrated that albuterol crosses the blood-brain barrier and reaches brain concentrations amounting to approximately 5% of the plasma concentrations. In structures outside the blood-brain barrier (pineal and pituitary glands), albuterol concentrations were found to be 100 times those in the whole brain.
Studies in laboratory animals (minipigs, rodents, and dogs) have demonstrated the occurrence of cardiac arrhythmias and sudden death (with histologic evidence of myocardial necrosis) when beta-agonists and methylxanthines are administered concurrently. The clinical relevance of these findings is unknown.
14 CLINICAL STUDIES
14.1 Bronchospasm Associated with Asthma
Adult and Adolescent Subjects Aged 12 Years and Older
The efficacy of albuterol sulfate HFA was evaluated in two 12-week, randomized, double-blind, placebo-controlled trials in subjects aged 12 years and older with mild to moderate asthma. These trials included a total of 610 subjects (323 males, 287 females). In each trial, subjects received 2 inhalations of albuterol sulfate HFA, CFC 11/12-propelled albuterol, or HFA-134a placebo 4 times daily for 12 weeks’ duration. Subjects taking the HFA-134a placebo inhaler also took albuterol sulfate HFA for asthma symptom relief on an as-needed basis. Some subjects who participated in these clinical trials were using concomitant inhaled steroid therapy. Efficacy was assessed by serial forced expiratory volume in 1 second (FEV1). In each of these trials, 2 inhalations of albuterol sulfate HFA produced significantly greater improvement in FEV1 over the pretreatment value than placebo. Results from the 2 clinical trials are described below.
In a 12-week, randomized, double-blind trial, albuterol sulfate HFA (101 subjects) was compared with CFC 11/12-propelled albuterol (99 subjects) and an HFA-134a placebo inhaler (97 subjects) in adolescent and adult subjects aged 12 to 76 years with mild to moderate asthma. Serial FEV1 measurements [shown below as percent change from test-day baseline at Day 1 (n = 297) and at Week 12 (n = 249)] demonstrated that 2 inhalations of albuterol sulfate HFA produced significantly greater improvement in FEV1 over the pretreatment value than placebo.
FEV1 as Percent Change from Predose in a Large, 12-Week Clinical Trial
In the responder population (≥15% increase in FEV1 within 30 minutes postdose) treated with albuterol sulfate HFA, the mean time to onset of a 15% increase in FEV1 over the pretreatment value was 5.4 minutes, and the mean time to peak effect was 56 minutes. The mean duration of effect as measured by a 15% increase in FEV1 over the pretreatment value was approximately 4 hours. In some subjects, duration of effect was as long as 6 hours.
The second 12-week randomized, double-blind trial was conducted to evaluate the efficacy and safety of switching subjects from CFC 11/12-propelled albuterol to albuterol sulfate HFA. During the 3-week run-in phase of the trial, all subjects received CFC 11/12-propelled albuterol. During the double-blind treatment phase, albuterol sulfate HFA (91 subjects) was compared to CFC 11/12-propelled albuterol (100 subjects) and an HFA-134a placebo inhaler (95 subjects) in adult and adolescent subjects with mild to moderate asthma. Serial FEV1 measurements demonstrated that 2 inhalations of albuterol sulfate HFA produced significantly greater improvement in pulmonary function than placebo. The switching from CFC 11/12-propelled albuterol inhaler to albuterol sulfate HFA did not reveal any clinically significant changes in the efficacy profile.
In the 2 adult trials, the efficacy results from albuterol sulfate HFA were significantly greater than placebo and were clinically comparable to those achieved with CFC 11/12-propelled albuterol, although small numerical differences in mean FEV1 response and other measures were observed. Physicians should recognize that individual responses to beta-adrenergic agonists administered via different propellants may vary and that equivalent responses in individual patients should not be assumed.
Pediatric Subjects Aged 4 to 11 Years
The efficacy of albuterol sulfate HFA was evaluated in one 2-week, randomized, double-blind, placebo-controlled trial in 135 pediatric subjects aged 4 to 11 years with mild to moderate asthma. In this trial, subjects received albuterol sulfate HFA, CFC 11/12-propelled albuterol, or HFA-134a placebo. Serial pulmonary function measurements demonstrated that 2 inhalations of albuterol sulfate HFA produced significantly greater improvement in pulmonary function than placebo and that there were no significant differences between the groups treated with albuterol sulfate HFA and CFC 11/12-propelled albuterol. In the responder population treated with albuterol sulfate HFA, the mean time to onset of a 15% increase in peak expiratory flow rate (PEFR) over the pretreatment value was 7.8 minutes, and the mean time to peak effect was approximately 90 minutes. The mean duration of effect as measured by a 15% increase in PEFR over the pretreatment value was greater than 3 hours. In some subjects, duration of effect was as long as 6 hours.
14.2 Exercise-Induced Bronchospasm
One controlled clinical trial in adult subjects with asthma (N = 24) demonstrated that 2 inhalations of albuterol sulfate HFA taken approximately 30 minutes prior to exercise significantly prevented exercise-induced bronchospasm (as measured by maximum percentage fall in FEV1 following exercise) compared with an HFA-134a placebo inhaler. In addition, albuterol sulfate HFA was shown to be clinically comparable to a CFC 11/12-propelled albuterol inhaler for this indication.
16 HOW SUPPLIED/STORAGE AND HANDLING
Albuterol Sulfate HFA Inhalation Aerosol is supplied in the following box of 1 as a pressurized aluminum canister fitted with a counter and supplied with a blue plastic actuator with a blue cap:
NDC 66993-019-68 18-g canister containing 200 actuations
Each inhaler is packaged with a Patient Information leaflet.
The blue actuator supplied with Albuterol Sulfate HFA should not be used with any other product canisters, and actuators from other products should not be used with an Albuterol Sulfate HFA canister.
Albuterol Sulfate HFA has a counter attached to the canister. The counter starts at 204 and counts down each time a spray is released. The correct amount of medication in each actuation cannot be assured after the counter reads 000, even though the canister is not completely empty and will continue to operate. The inhaler should be discarded when the counter reads 000.
Contents Under Pressure
Do not puncture. Do not use or store near heat or open flame. Exposure to temperatures above 120°F may cause bursting. Never throw canister into fire or incinerator.
Store at room temperature between 68°F and 77°F (20°C and 25°C); excursions permitted from 59°F to 86°F (15°C to 30°C) [See USP Controlled Room Temperature]. Store the inhaler with the mouthpiece down. For best results, the inhaler should be at room temperature before use.
17 PATIENT COUNSELING INFORMATION
Advise the patient to read the FDA-approved patient labeling (Patient Information and Instructions for Use).
Frequency of Use
Inform patients that the action of Albuterol Sulfate HFA should last up to 4 to 6 hours. Do not use Albuterol Sulfate HFA more frequently than recommended. Instruct patients not to increase the dose or frequency of doses of Albuterol Sulfate HFA without consulting the physician. Instruct patients to seek medical attention immediately if treatment with Albuterol Sulfate HFA becomes less effective for symptomatic relief, symptoms become worse, and/or they need to use the product more frequently than usual.
Instruct patients to prime Albuterol Sulfate HFA before using for the first time, when the inhaler has not been used for more than 2 weeks, or when the inhaler has been dropped. To prime Albuterol Sulfate HFA, release 4 sprays into the air away from the face, shaking well before each spray. Avoid spraying in eyes.
To ensure proper dosing and to prevent actuator orifice blockage, instruct patients to wash the actuator with warm water and let it air-dry completely at least once a week. Inform patients that detailed cleaning instructions are included in the Patient Information leaflet.
Inform patients that Albuterol Sulfate HFA can produce paradoxical bronchospasm. Instruct them to discontinue Albuterol Sulfate HFA if paradoxical bronchospasm occurs [see Warnings and Precautions (5.1)].
Concomitant Drug Use
Advise patients that while they are using Albuterol Sulfate HFA, other inhaled drugs and asthma medications should be taken only as directed by the physician.
Common Adverse Effects
Common adverse effects of treatment with inhaled albuterol include palpitations, chest pain, rapid heart rate, tremor, and nervousness.
Pregnancy Exposure Registry
Inform women there is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to asthma medications, including Albuterol Sulfate HFA, during pregnancy and that they can enroll in the Pregnancy Exposure Registry by calling 1-877-311-8972 or by visiting https://mothertobaby.org/ongoing-study/asthma [see Use in Specific Populations (8.1)].
Mason, OH 45040 USA
Research Triangle Park, NC 27709
PATIENT PACKAGE INSERT
Albuterol Sulfate HFA
for oral inhalation use
What is Albuterol Sulfate HFA?
- Albuterol Sulfate HFA is a prescription inhaled medicine used in people aged 4 years and older to:
- treat or prevent bronchospasm in people who have reversible obstructive airway disease.
- prevent exercise-induced bronchospasm.
- It is not known if Albuterol Sulfate HFA is safe and effective in children younger than 4 years of age.
Do not use Albuterol Sulfate HFA:
- if you are allergic to albuterol sulfate propionate or any of the ingredients in Albuterol Sulfate HFA. See the end of this Patient Information for a complete list of ingredients in Albuterol Sulfate HFA.
Before using Albuterol Sulfate HFA, tell your healthcare provider about all of your medical conditions, including if you:
- have heart problems.
- have high blood pressure.
- have seizures.
- have thyroid problems.
- have diabetes.
- have low potassium levels in your blood.
- are pregnant or plan to become pregnant. It is not known if Albuterol Sulfate HFA may harm your unborn baby.
- Pregnancy Registry. There is a pregnancy registry for women with asthma who receive asthma medications, including Albuterol Sulfate HFA, while pregnant. The purpose of the registry is to collect information about the health of you and your baby. You can talk to your healthcare provider about how to take part in this registry or you can get more information and register by calling 1-877-311-8972 or go to https://mothertobaby.org/ongoing-study/asthma.
- are breastfeeding. It is not known if the medicine in Albuterol Sulfate HFA passes into your milk and if it can harm your baby.
Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. Albuterol Sulfate HFA and certain other medicines may interact with each other. This may cause serious side effects. Especially tell your healthcare provider if you take:
- other inhaled medicines or asthma medicines
- beta-blocker medicines
- monoamine oxidase inhibitors
- tricyclic antidepressants
Know the medicines you take. Keep a list of them to show your healthcare provider and pharmacist when you get a new medicine.
How should I use Albuterol Sulfate HFA?
Read the step-by-step instructions for using Albuterol Sulfate HFA at the end of this Patient Information.
- Do not use Albuterol Sulfate HFA unless your healthcare provider has taught you how to use the inhaler and you understand how to use it correctly.
- Children should use Albuterol Sulfate HFA with an adult’s help, as instructed by the child’s healthcare provider.
- Use Albuterol Sulfate HFA exactly as your healthcare provider tells you to use it. Do not use Albuterol Sulfate HFA more often than prescribed.
- Do not increase your dose or take extra doses of Albuterol Sulfate HFA without first talking to your healthcare provider.
- Each dose of Albuterol Sulfate HFA should last up to 4 hours to 6 hours.
- Get medical help right away if Albuterol Sulfate HFA no longer helps your symptoms.
- Get medical help right away if your symptoms get worse or if you need to use your inhaler more often.
- While you are using Albuterol Sulfate HFA, use other inhaled medicines and asthma medicines only as directed by your healthcare provider.
- Call your healthcare provider if your asthma symptoms like wheezing and trouble breathing become worse over a few hours or days. Your healthcare provider may need to give you another medicine to treat your symptoms.
What are the possible side effects with Albuterol Sulfate HFA?
Albuterol Sulfate HFA can cause serious side effects, including:
- worsening trouble breathing, coughing, and wheezing (paradoxical bronchospasm). If this happens, stop using Albuterol Sulfate HFA and call your healthcare provider or get emergency help right away. Paradoxical bronchospasm is more likely to happen with your first use of a new canister of medicine.
- heart problems, including faster heart rate and higher blood pressure.
- possible death in people with asthma who use too much Albuterol Sulfate HFA.
- serious allergic reactions. Call your healthcare provider or get emergency medical care if you get any of the following symptoms of a serious allergic reaction:
- swelling of your face, mouth, and tongue
- breathing problems
- changes in laboratory blood levels (sugar, potassium).
Common side effects of Albuterol Sulfate HFA include:
- sore throat
- upper respiratory tract infection, including viral infection
- muscle pain
- your heart feels like it is pounding or racing (palpitations)
- chest pain
- fast heart rate
These are not all the possible side effects of Albuterol Sulfate HFA.
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
How should I store Albuterol Sulfate HFA?
- Store Albuterol Sulfate HFA at room temperature between 68°F and 77°F (20°C and 25°C) with the mouthpiece down.
- The contents of your Albuterol Sulfate HFA are under pressure: Do not puncture. Do not use or store near heat or open flame. Temperatures above 120°F may cause the canister to burst.
- Do not throw into fire or an incinerator.
Keep Albuterol Sulfate HFA and all medicines out of the reach of children.
General information about the safe and effective use of Albuterol Sulfate HFA.
Medicines are sometimes prescribed for purposes other than those listed in a Patient Information leaflet. Do not use Albuterol Sulfate HFA for a condition for which it was not prescribed. Do not give Albuterol Sulfate HFA to other people, even if they have the same symptoms that you have. It may harm them.
You can ask your healthcare provider or pharmacist for information about Albuterol Sulfate HFA that was written for health professionals.
What are the ingredients in Albuterol Sulfate HFA?
Active ingredient: albuterol sulfate
Inactive ingredient: propellant HFA-134a
For more information about Albuterol Sulfate HFA, call 1-866-525-0688.
Manufactured for: Prasco Laboratories, Mason, OH 45040 USA
Manufactured by: GlaxoSmithKline, Research Triangle Park, NC 27709
This Patient Information has been approved by the U.S. Food and Drug Administration Revised: February 2020
- This Instructions for Use has been approved by the U.S.
- Food and Drug Administration Revised: September 2021
PRINCIPAL DISPLAY PANEL
PRINCIPAL DISPLAY PANEL
Albuterol Sulfate HFA
90 mcg per actuation
200 Metered Inhalations
For oral inhalation with Albuterol Sulfate HFA actuator only.
Discard when the counter reads 000.
Net Wt. 18 g
Mason, OH 45040 USA
Contents: A microcrystalline suspension of albuterol sulfate in propellant HFA-134a (1,1,1,2-tetrafluoroethane). Each actuation delivers 108 mcg of albuterol sulfate equivalent to 90 mcg albuterol base from the mouthpiece. See prescribing information for dosage information.
Important: Read accompanying directions carefully.
WARNING: Do not exceed the dose prescribed by your doctor.
If difficulty in breathing persists, get immediate medical help.
Contents Under Pressure: Do not puncture. Do not use or store near heat or open flame. Keep out of reach of children.
Shake the inhaler well before each spray.
Store at room temperature between 68oF and 77oF (20oC and 25oC) with the mouthpiece down.
- 62000000048044 Rev. 3/20
INGREDIENTS AND APPEARANCE
ALBUTEROL SULFATE HFA
albuterol sulfate aerosol, metered
Product Information Product Type HUMAN PRESCRIPTION DRUG Item Code (Source) NDC:66993-019 Route of Administration RESPIRATORY (INHALATION) Active Ingredient/Active Moiety Ingredient Name Basis of Strength Strength ALBUTEROL SULFATE (UNII: 021SEF3731) (ALBUTEROL - UNII:QF8SVZ843E) ALBUTEROL 90 ug Inactive Ingredients Ingredient Name Strength NORFLURANE (UNII: DH9E53K1Y8) Packaging # Item Code Package Description Marketing Start Date Marketing End Date 1 NDC:66993-019-68 1 in 1 CARTON 01/15/2019 1 200 in 1 INHALER; Type 2: Prefilled Drug Delivery Device/System (syringe, patch, etc.) Marketing Information Marketing Category Application Number or Monograph Citation Marketing Start Date Marketing End Date NDA authorized generic NDA020983 01/15/2019 Labeler - Prasco Laboratories (065969375) Registrant - GlaxoSmithKline LLC (167380711)