Albuterol Sulfate Inhalation Aerosol
For Oral Inhalation Only
TABLE OF CONTENTS
Albuterol sulfate is a relatively selective beta2-adrenergic agonist. Albuterol sulfate has the chemical name α1-[(tert-butylamino) methyl]-4-hydroxy-m-xylene-α,α’-diol sulfate (2:1) (salt). The molecular weight of albuterol sulfate is 576.7, the empirical formula is (C13H21NO3)2 H2SO4. and it has the following chemical structure:
Albuterol sulfate is a white to off-white crystalline powder. It is soluble in water and slightly soluble in ethanol. Albuterol sulfate is the official generic name in the United States, and salbutamol sulfate is the World Health Organization recommended generic name. Albuterol Inhalation Aerosol is a pressurized metered-dose aerosol unit for oral inhalation. It contains a microcrystalline suspension of albuterol sulfate in propellant HFA-134a (1, 1, 1, 2-tetrafluoroethane) and ethanol.
Prime the inhaler before using for the first time and in cases where the inhaler has not been used for more than 2 weeks by releasing three “test sprays” into the air, away from the face. After priming, each actuation delivers 108 mcg albuterol sulfate, from the actuator mouthpiece (equivalent to 90 mcg of albuterol base). Each canister provides 200 actuations (inhalations).
This product does not contain chlorofluorocarbons (CFCs) as the propellant.
|2. INDICATIONS AND USAGE|
Albuterol Inhalation Aerosol is indicated for the treatment or prevention of bronchospasm in patients 4 years of age and older with reversible obstructive airway disease.
2.2 Exercise-Induced Bronchospasm
Albuterol Inhalation Aerosol is indicated for the prevention of exercise-induced bronchospasm in patients 4 years of age and older.
|3. DOSAGE AND ADMINISTRATION|
Administer Albuterol Inhalation Aerosol by oral inhalation only. Shake Albuterol Inhalation Aerosol well before each spray.
For treatment of acute episodes of bronchospasm or prevention of symptoms associated with bronchospasm, the usual dosage for adults and children is 2 inhalations repeated every 4 to 6 hours; in some patients, 1 inhalation every 4 hours may be sufficient. More frequent administration or a larger number of inhalations is not recommended.
3.2 Exercise-Induced Bronchospasm
The usual dosage for adults and children 4 years of age and older is 2 inhalations 15 to 30 minutes before exercise.
3.3 Administration Information
Priming: Priming Albuterol Inhalation Aerosol is essential to ensure appropriate albuterol content in each actuation. Prime Albuterol Inhalation Aerosol 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 Inhalation Aerosol, release 4 sprays into the air away from the face, shaking well before each spray.
Cleaning: 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.
Dose Counter: Albuterol Inhalation Aerosol has a dose counter attached to the canister that starts at 204 or 64 and counts down each time a spray is released. When the counter reads 020, the patient should contact the pharmacist for a refill of medication or consult the physician to determine whether a prescription refill is needed.
Albuterol Inhalation Aerosol comes in a moisture-protective foil pouch, which should be removed prior to use. Discard Albuterol Inhalation Aerosol when the counter reads 000 or 12 months after removal from the moisture-protective foil pouch, whichever comes first.
See Patient Information tear-off leaflet for instructions on how to prime and clean the inhaler to ensure proper dosing and to prevent actuator orifice blockage.
Albuterol Inhalation Aerosol is contraindicated in patients with a history of hypersensitivity to albuterol and any other Albuterol Inhalation Aerosol components. Rare cases of hypersensitivity reactions, including urticaria, angioedema, and rash have been reported after the use of albuterol sulfate.
|5. MECHANISM OF ACTION|
Activation of beta2-adrenergic receptors on airway smooth muscle leads to the activation of adenylcyclase and to an increase in the intracellular concentration of cyclic-3', 5’-adenosine monophosphate (cyclic AMP). This increase of cyclic AMP is associated with the activation of protein kinase A, which in turn inhibits the phosphorylation of myosin and lowers intracellular ionic calcium concentrations, resulting in muscle relaxation. Albuterol relaxes the smooth muscle of all airways, from the trachea to the terminal bronchioles. Increased cyclic AMP concentrations are also associated with the inhibition of release of mediators from mast cells in the airway. Albuterol acts as a functional antagonist to relax the airway irrespective of the spasmogen involved, thus protecting against all bronchoconstrictor challenges. While it is recognized that beta2-adrenergic receptors are the predominant receptors on bronchial smooth muscle, data indicate that there are beta-receptors in the human heart, 10% to 50% of which are cardiac beta2-adrenergic receptors. The precise function of these receptors has not been established. However, all 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.
|6. USE IN SPECIFIC POPULATIONS|
6.1 Usage in Pregnancy
Pregnancy Category C
There are no adequate and well-controlled studies of Albuterol Inhalation Aerosol or albuterol sulfate in pregnant women. During worldwide marketing experience, various congenital anomalies, including cleft palate and limb defects, have been reported in the offspring of patients being treated with albuterol. Some of the mothers were taking multiple medications during their pregnancies. No consistent pattern of defects can be discerned, and a relationship between albuterol use and congenital anomalies has not been established. Animal reproduction studies in mice and rabbits revealed evidence of teratogenicity. Albuterol Inhalation Aerosol should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.
In a mouse reproduction study, subcutaneously administered albuterol sulfate produced cleft palate formation in 5 of 111 (4.5%) fetuses at exposures approximately equal to the maximum recommended human dose (MRHD) for adults on a mg/m2 basis and in 10 of 108 (9.3%) fetuses at approximately 8 times the MRHD. Similar effects were not observed at approximately one eleventh of the MRHD. Cleft palate also occurred in 22 of 72 (30.5%) fetuses from females treated subcutaneously with isoproterenol (positive control).
In a rabbit reproduction study, orally administered albuterol sulfate produced cranioschisis in 7 of 19 fetuses (37%) at approximately 680 times the MRHD.
In another rabbit study, an albuterol sulfate/HFA-134a formulation administered by inhalation produced enlargement of the frontal portion of the fetal fontanelles at approximately one third of the MRHD.
6.2 Labor and Delivery
Because of the potential for beta-agonist interference with uterine contractility, use of Albuterol HFA Inhalation Aerosol for relief of bronchospasm during labor should be restricted to those patients in whom the benefits clearly outweigh the risk.
6.3 Nursing Mothers
Plasma levels of albuterol sulfate and HFA-134a after inhaled therapeutic doses are very low in humans, but it is not known whether the components of Albuterol HFA Inhalation Aerosol are excreted in human milk.
Because of the potential for tumorigenicity shown for albuterol in animal studies and lack of experience with the use of Albuterol HFA Inhalation Aerosol by nursing mothers, a decision should be made whether to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother. Caution should be exercised when albuterol sulfate is administered to a nursing woman.
6.4 Pediatric Use
The safety and effectiveness of Albuterol Inhalation Aerosol in children 4 years of age and older has been established based upon two 12-week clinical trials in patients 12 years of age and older with asthma and one 2-week clinical trial in patients 4 to 11 years of age with asthma [see Adverse Reactions]. The safety and effectiveness of Albuterol Inhalation Aerosol in children under 4 years of age has not been established. Three studies have been conducted to evaluate the safety and efficacy of Albuterol Inhalation Aerosol in patients under 4 years of age and the findings are described below.
Two 4-week randomized, double-blind, placebo-controlled studies were conducted in 163 pediatric patients from birth to 48 months of age with symptoms of bronchospasm associated with obstructive airway disease (presenting symptoms included: wheeze, cough, dyspnea, or chest tightness). Albuterol Inhalation Aerosol 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 study, Albuterol Inhalation Aerosol 90 mcg (N = 26), Albuterol Inhalation Aerosol 180 mcg (N = 25), and placebo HFA (N = 26) were administered to children between 24 and 48 months of age. In the second study, Albuterol Inhalation Aerosol 90 mcg (N = 29), Albuterol Inhalation Aerosol 180 mcg (N = 29), and placebo HFA (N = 28) were administered to children between birth and 24 months of age. Over the 4-week treatment period, there were no treatment differences in asthma symptom scores between the groups receiving Albuterol Inhalation Aerosol 90 mcg, Albuterol Inhalation Aerosol 180 mcg, and placebo in either study.
In a third study, Albuterol Inhalation Aerosol was evaluated in 87 pediatric patients younger than 24 months of age for the treatment of acute wheezing. Albuterol Inhalation Aerosol was delivered with an AeroChamber Plus Valved Holding Chamber in this study. There were no significant differences in asthma symptom scores and mean change from baseline in an asthma symptom score between Albuterol Inhalation Aerosol 180 mcg and Albuterol Inhalation Aerosol 360 mcg.
In vitro dose characterization studies were performed to evaluate the delivery of Albuterol Inhalation Aerosol via holding chambers with facemasks. The studies were conducted with 2 different holding chambers with facemasks (small and medium size). The in vitro study data when simulated to patients suggest that the dose of Albuterol Inhalation Aerosol presented for inhalation via a valved holding chamber with facemask will be comparable to the dose delivered in adults without a spacer and facemask per kilogram of body weight (Table 1). However, clinical studies in children under 4 years of age described above suggest that either the optimal dose of Albuterol Inhalation Aerosol has not been defined in this age-group or Albuterol Inhalation Aerosol is not effective in this age-group. The safety and effectiveness of Albuterol Inhalation Aerosol administered with or without a spacer device in children under 4 years of age has not been demonstrated.
Table 1. In Vitro Medication Delivery Through AeroChamber Plus® Valved Holding Chamber With a Facemask
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 Inhalation Aerosol in a 70-kg adult without use of a valved holding chamber and facemask delivers approximately 90 mcg, or 1.3 mcg/kg.
6.5 Geriatric Use
Clinical studies of Albuterol Inhalation Aerosol did not include sufficient numbers of subjects aged 65 and over 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, 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.
|7. WARNINGS AND PRECAUTIONS|
7.1 Paradoxical Bronchospasm
Albuterol Inhalation Aerosol can produce paradoxical bronchospasm that may be life threatening. If paradoxical bronchospasm occurs, Albuterol HFA Inhalation Aerosol should be discontinued immediately and alternative therapy instituted. It should be recognized that paradoxical bronchospasm, when associated with inhaled formulations, frequently occurs with the first use of a new canister.
7.2 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 HFA Inhalation Aerosol than usual, this may be a marker of destabilization of asthma and requires re-evaluation of the patient and treatment regimen, giving special consideration to the possible need for anti-inflammatory treatment, e.g., corticosteroids.
7.3 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 antiinflammatory agents, e.g., corticosteroids, to the therapeutic regimen.
7.4 Cardiovascular Effects
Albuterol HFA Inhalation Aerosol, like other beta-adrenergic agonists, can produce clinically significant cardiovascular effects in some patients as measured by pulse rate, blood pressure, and/or symptoms. Although such effects are uncommon after administration of Albuterol HFA Inhalation Aerosol at recommended doses, if they occur, the drug may need to be discontinued. In addition, beta-agonists have been reported to produce ECG changes, such as flattening of the T wave, prolongation of the QTc interval, and ST segment depression. The clinical significance of these findings is unknown. Therefore, Albuterol HFA Inhalation Aerosol, like all sympathomimetic amines, should be used with caution in patients with cardiovascular disorders, especially coronary insufficiency, cardiac arrhythmias, and hypertension.
7.5 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.
7.6 Immediate Hypersensitivity Reactions
Immediate hypersensitivity reactions may occur after administration of albuterol sulfate, as demonstrated by rare cases of urticaria, angioedema, rash, bronchospasm, anaphylaxis, and oropharyngeal edema. The potential for hypersensitivity must be considered in the clinical evaluation of patients who experience immediate hypersensitivity reactions while receiving Albuterol HFA Inhalation Aerosol.
7.7 Coexisting Conditions
Albuterol HFA Inhalation Aerosol, like all sympathomimetic amines, should be used with caution in patients with cardiovascular disorders, especially coronary insufficiency, cardiac arrhythmias, and hypertension; in patients with convulsive disorders, hyperthyroidism, or diabetes mellitus; and in patients who are unusually responsive to sympathomimetic amines. Clinically significant changes in systolic and diastolic blood pressure have been seen in individual patients and could be expected to occur in some patients after use of any beta-adrenergic bronchodilator. Large doses of intravenous albuterol have been reported to aggravate preexisting diabetes mellitus and ketoacidosis.
As with other beta-agonists, Albuterol HFA Inhalation Aerosol may produce significant hypokalemia in some patients, possibly through intracellular shunting, which has the potential to produce adverse cardiovascular effects. The decrease is usually transient, not requiring supplementation.
|8. ADVERSE REACTIONS|
Use of Albuterol HFA may be associated with the following:
• Paradoxical bronchospasm [see Warnings and Precautions]
• Cardiovascular Effects [see Warnings and Precautions]
• Immediate hypersensitivity reactions [see Warnings and Precautions]
• Hypokalemia [see Warnings and Precautions]
8.1 Clinical Trials Experience
A total of 1090 subjects were treated with Albuterol HFA Inhalation Aerosol, or with the same formulation of albuterol as in Albuterol HFA Inhalation Aerosol, during the worldwide clinical development program.
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.
Adult and Adolescents 12 Years of Age and Older: The adverse reaction information presented in the table below concerning Albuterol HFA Inhalation Aerosol is derived from a 6-week, blinded study which compared Albuterol HFA Inhalation Aerosol (180 mcg four times daily) with a double-blinded matched placebo HFA-Inhalation Aerosol and an evaluator-blinded marketed active comparator HFA-134a albuterol inhaler in 172 asthmatic patients 12 to 76 years of age. The table lists the incidence of all adverse events (whether considered by the investigator drug related or unrelated to drug) from this study which occurred at a rate of 3% or greater in the Albuterol HFA Inhalation Aerosol treatment group and more frequently in the Albuterol HFA Inhalation Aerosol treatment group than in the matched placebo group. Overall, the incidence and nature of the adverse events reported for Albuterol HFA Inhalation Aerosol and the marketed active comparator HFA-134a albuterol inhaler were comparable.
Adverse events reported by less than 3% of the patients receiving Albuterol HFA Inhalation Aerosol but by a greater proportion of Albuterol HFA Inhalation Aerosol patients than the matched placebo patients, which have the potential to be related to Albuterol HFA Inhalation Aerosol, included chest pain, infection, diarrhea, glossitis, accidental injury (nervous system), anxiety, dyspnea, ear disorder, ear pain, and urinary tract infection.
Pediatric Patients 4 to 11 Years of Age: Adverse events reported in a 3-week pediatric clinical trial comparing the same formulation of albuterol as in Albuterol HFA Inhalation Aerosol (180 mcg albuterol four times daily) to a matching placebo HFA inhalation aerosol occurred at a low incidence rate (no greater than 2% in the active treatment group) and were similar to those seen in adult and adolescent trials.
8.2 Postmarketing Experience
The following adverse reactions have been identified during postapproval use of Albuterol HFA. 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. Reports have included rare cases of aggravated bronchospasm, lack of efficacy, asthma exacerbation (reported fatal in one case), muscle cramps, and various oropharyngeal side-effects such as throat irritation, altered taste, glossitis, tongue ulceration, and gagging.
The following adverse events have been observed in postapproval use of inhaled albuterol: urticaria, angioedema, rash, bronchospasm, hoarseness, oropharyngeal edema, and arrhythmias (including atrial fibrillation, supraventricular tachycardia, extrasystoles). In addition, albuterol, like other sympathomimetic agents, can cause adverse reactions such as: angina, hypertension or hypotension, palpitations, central nervous system stimulation, insomnia, headache, nervousness, tremor, muscle cramps, drying or irritation of the oropharynx, hypokalemia, hyperglycemia, and metabolic acidosis.
The expected symptoms with overdosage are those of excessive beta-adrenergic stimulation and/or occurrence or exaggeration of any of the symptoms listed under ADVERSE REACTIONS, e.g., seizures, angina, hypertension or hypotension, tachycardia with rates up to 200 beats per minute, arrhythmias, nervousness, headache, tremor, dry mouth, palpitation, nausea, dizziness, fatigue, malaise, and insomnia.
Hypokalemia may also occur. As with all sympathomimetic medications, cardiac arrest and even death may be associated with abuse of Albuterol HFA Inhalation Aerosol.
Treatment consists of discontinuation of the Inhalation Aerosol 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 HFA Inhalation Aerosol.
|10. DRUG INTERACTIONS|
Other short-acting sympathomimetic aerosol bronchodilators should not be used concomitantly with Albuterol HFA Inhalation Aerosol. If additional adrenergic drugs are to be administered by any route, they should be used with caution to avoid deleterious cardiovascular effects.
Beta-Blockers: Beta-adrenergic-receptor blocking agents not only block the pulmonary effect of beta-agonists, such as Albuterol HFA Inhalation Aerosol, but may produce severe bronchospasm in asthmatic patients. Therefore, patients with asthma should not normally be treated with beta-blockers. However, under certain circumstances, e.g., as prophylaxis after myocardial infarction, there may be no acceptable alternatives to the use of beta-adrenergic-blocking agents in patients with asthma. In this setting, cardioselective beta-blockers should be considered, although they should be administered with caution.
Diuretics: The ECG changes and/or hypokalemia which 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 beta-agonists with non-potassium sparing diuretics.
Digoxin: Mean decreases of 16% and 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 significance of these findings for patients with obstructive airway disease who are receiving 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 HFA Inhalation Aerosol.
Monoamine Oxidase Inhibitors or Tricyclic Antidepressants: Albuterol HFA Inhalation Aerosol 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 cardiovascular system may be potentiated.
The systemic levels of albuterol are low after inhalation of recommended doses. In a crossover study conducted in healthy male and female volunteers, high cumulative doses of Albuterol HFA Inhalation Aerosol (1,080 mcg of albuterol base administered over one hour) yielded mean peak plasma concentrations (Cmax) and systemic exposure (AUCinf) of approximately 4,100 pg/mL and 28,426 pg/mL*hr, respectively compared to approximately 3,900 pg/mL and 28,395 pg/mL*hr, respectively following the same dose of an active HFA-134a albuterol inhaler comparator. The terminal plasma half-life of albuterol delivered by Albuterol HFA Inhalation Aerosol was approximately 6 hours. Comparison of the pharmacokinetic parameters demonstrated no differences between the products.
The pharmacokinetic profile of Albuterol HFA Inhalation Aerosol was evaluated in a two-way cross-over study in 11 healthy pediatric volunteers, 4 to 11 years of age. A single dose administration of Albuterol HFA Inhalation Aerosol (180 mcg albuterol base) yielded a least square mean (SE) Cmax and AUC0-∞ of 1,100 (1.18) pg/mL and 5,120 (1.15) pg/mL*hr, respectively. The least square mean (SE) terminal plasma half-life of albuterol delivered by Albuterol HFA Inhalation Aerosol was 166 (7.8) minutes.
Metabolism and Elimination: Information available in the published literature suggests that the primary enzyme responsible for the metabolism of albuterol in humans is SULTIA3 (sulfotransferase). When racemic albuterol was administered either intravenously or via inhalation after oral charcoal administration, there was a 3- to 4-fold difference in the area under the concentration-time curves between the (R)- and (S)-albuterol enantiomers, with (S)-albuterol concentrations being consistently higher. However, without charcoal pretreatment, after either oral or inhalation administration the differences were 8- to 24-fold, suggesting that the (R)albuterol is preferentially metabolized in the gastrointestinal tract, presumably by SULTIA3.
The primary route of elimination of albuterol is through renal excretion (80% to 100%) of either the parent compound or the primary metabolite. Less than 20% of the drug is detected in the feces. Following intravenous administration of racemic albuterol, between 25% and 46% of the (R)-albuterol fraction of the dose was excreted as unchanged (R)-albuterol in the urine.
Geriatric, Pediatric, Hepatic/Renal Impairment: No pharmacokinetic studies for Albuterol HFA Inhalation Aerosol have been conducted in neonates or elderly subjects.
The effect of hepatic impairment on the pharmacokinetics of Albuterol HFA Inhalation Aerosol has not been evaluated.
The effect of renal impairment on the pharmacokinetics of albuterol was evaluated in 5 subjects with creatinine clearance of 7 to 53 mL/min, and the results were compared with those from healthy volunteers. Renal disease had no effect on the half-life, but there was a 67% decline in albuterol clearance. Caution should be used when administering high doses of Albuterol HFA Inhalation Aerosol to patients with renal impairment [see Use in Specific Populations].
|12. HOW SUPPLIED/STORAGE AND HANDLING|
1) How Available:
a) Brand names: PROAIR HFA, by Teva Global.
VENTOLIN HFA, by GlaxoSmithKline.
b) Generic drugs: None.
2) How Supplied:
PROAIR HFA (albuterol sulfate) Inhalation Aerosol is supplied as a pressurized aluminum canister with a red plastic actuator and white dust cap each in boxes of one. Each canister contains 8.5 g of the formulation and provides 200 actuations (NDC 59310-579-20). Each actuation delivers 120 mcg of albuterol sulfate from the canister valve and 108 mcg of albuterol sulfate from the actuator mouthpiece (equivalent to 90 mcg of albuterol base).
VENTOLIN HFA (albuterol sulfate HFA inhalation aerosol) is supplied as a pressurized aluminum canister fitted with a counter with a blue plastic actuator and a blue strapcap packaged within a moisture-protective foil pouch, each in boxes of 1 with patient’s instructions (NDC 0173-0682-20). The moisture-protective foil pouch also contains a desiccant that should be discarded when the pouch is opened.
Priming the inhalation aerosol is essential to ensure appropriate albuterol content in each actuation. To prime the inhaler, release 4 test sprays into the air away from the face, shaking well before each spray. The inhaler should be primed before using it for the first time, when the inhaler has not been used for more than 2 weeks, or when it has been dropped.
After priming, each actuation 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). The canister is labeled with a net weight of 18 g and contains 200 metered inhalations.
SHAKE WELL BEFORE USE. Store between 15° and 25°C (59° and 77°F). Contents under pressure. Do not puncture or incinerate. Protect from freezing temperatures and prolonged exposure to direct sunlight. Exposure to temperatures above 120ºF may cause bursting. For best results, canister should be at room temperature before use. Avoid spraying in eyes. Keep out of reach of children.
The red actuator supplied with PROAIR HFA Inhalation Aerosol or the blue actuator supplied with VENTOLIN HFA should not be used with the canister from any other inhalation aerosol products.
The labeled amount of medication in each actuation cannot be assured after 200 actuations, even though the canister may not be completely empty. Discard the inhaler (canister plus actuator) after 200 actuations have been used. Never immerse the canister into water to determine how full the canister is (“float test”).
PROAIR HFA or VENTOLIN HFA Inhalation Aerosol does not contain chlorofluorocarbons (CFCs) as the propellant.