Head-to-head clinical analysis & difference comparison: details on mechanism of action, dosing, half-life, interactions, and maternal-fetal safety.
PROAIR HFA vs ACLOVATE
Clinician-reviewed, head-to-head comparison of mechanism, dosing, pharmacokinetics, and safety profiles.
Last clinically reviewed: July 2026 · OpiCalc Medical Review Team
Selective beta-2 adrenergic receptor agonist; relaxes bronchial smooth muscle by increasing intracellular cyclic AMP.
Aclovate (alclometasone dipropionate) is a synthetic corticosteroid with anti-inflammatory, antipruritic, and vasoconstrictive properties. Its mechanism involves binding to glucocorticoid receptors, modulating gene expression to inhibit phospholipase A2, reducing arachidonic acid release, and decreasing prostaglandin and leukotriene synthesis.
Treatment or prevention of bronchospasm in patients with reversible obstructive airway disease,Prevention of exercise-induced bronchospasm
Relief of inflammatory and pruritic manifestations of corticosteroid-responsive dermatoses (e.g., atopic dermatitis, contact dermatitis, eczema, psoriasis) - FDA approved,Off-label: Treatment of mild to moderate plaque psoriasis, seborrheic dermatitis, and lichen planus
Two inhalations (90 mcg each) via oral inhalation every 4-6 hours as needed; for prevention of exercise-induced bronchospasm, two inhalations 15-30 minutes before exercise.
Apply a thin film to affected skin areas twice daily. Not for ophthalmic, oral, or intravaginal use.
Terminal elimination half-life: 3.8 to 5 hours; clinically, this supports a dosing interval of every 4-6 hours as needed for symptom relief.
Terminal elimination half-life: approximately 6-8 hours after topical application; systemic absorption is minimal under normal use.
Primarily metabolized by catechol-O-methyltransferase (COMT) and to a lesser extent by sulfation; not metabolized by CYP450 enzymes.
Aclovate is metabolized in the skin and liver via ester hydrolysis to inactive metabolites. Systemic metabolism primarily involves cytochrome P450 enzymes (CYP3A4) for any absorbed fraction, but extensive first-pass metabolism limits systemic exposure.
Renal: approximately 72% as unchanged drug and metabolites; fecal: approximately 10%; biliary: minimal.
Renal (primarily as metabolites, <5% unchanged), biliary/fecal (minor).
Approximately 94% bound to human serum albumin.
Approximately 90%, primarily to albumin and corticosteroid-binding globulin (CBG).
Vd: 1.9 to 2.7 L/kg; this large Vd indicates extensive distribution into tissues, including lung tissue.
Not well-characterized in topical use; after systemic absorption, Vd is approximately 1-2 L/kg, indicating distribution into tissues.
Inhalation: approximately 10-20% of the administered dose reaches the lungs; the remainder is swallowed and undergoes first-pass metabolism resulting in negligible oral bioavailability.
Topical: approximately 1-3% systemic absorption on intact skin; increased up to 15% on occluded or damaged skin.
No dosage adjustment required for renal impairment.
No dose adjustment required. Topical use with minimal systemic absorption.
No dosage adjustment required for hepatic impairment.
No dose adjustment required. Topical use with minimal systemic absorption.
Children 4-11 years: Two inhalations (90 mcg each) via oral inhalation every 4-6 hours as needed; for exercise-induced bronchospasm, two inhalations 15-30 minutes before exercise. Children <4 years: Safety and efficacy not established.
Use smallest amount effective for shortest duration. Avoid prolonged use, occlusive dressings, or application to large surface areas. Safety in children <1 year not established.
No specific dose adjustment; use with caution due to potential for decreased renal function and increased sensitivity to beta-agonists.
Use with caution due to increased risk of skin atrophy and systemic absorption. Limit frequency and duration; avoid occlusive dressings.
Not applicable; no black box warning.
No FDA black box warning.
Paradoxical bronchospasm may occur,Cardiovascular effects: increased heart rate, blood pressure, or ECG changes,Immediate hypersensitivity reactions,Potentially severe hypokalemia,May exacerbate diabetes and ketoacidosis
Topical corticosteroids can cause hypothalamic-pituitary-adrenal (HPA) axis suppression, especially with prolonged use, large surface area, occlusion, or in pediatric patients.,Reversible HPA axis suppression may occur after discontinuation.,Systemic effects including Cushing's syndrome, hyperglycemia, and glucosuria have been reported.,Local adverse reactions: burning, itching, irritation, dryness, folliculitis, hypopigmentation, allergic contact dermatitis, maceration, secondary infection, skin atrophy, striae, and miliaria.,Use caution in patients with impaired skin integrity or areas of skin atrophy.,Pediatric patients may be more susceptible to systemic toxicity due to higher skin surface-to-body-weight ratio.
Hypersensitivity to albuterol or any component of the formulation
Hypersensitivity to alclometasone dipropionate or any component of the formulation.,Untreated bacterial, fungal, or viral skin infections (e.g., herpes simplex, varicella, tuberculosis of the skin).
No significant food interactions. Avoid caffeine and stimulants as they may increase cardiovascular side effects (tachycardia, palpitations). No dietary restrictions required.
No known food interactions with topical Aclovate.
FDA Pregnancy Category C. No adequate well-controlled studies in pregnant women. In animal studies, albuterol sulfate caused fetal malformations (cleft palate, limb defects) at doses 0.4-1.2 times the maximum human daily inhalation dose. Risk cannot be ruled out; use only if potential benefit justifies potential risk. For trimester-specific risks: first trimester: potential for orofacial clefts and limb defects; second/third trimesters: risk of maternal tachycardia and hypoglycemia in neonate; labor inhibition near term; possible neonatal transient hypoglycemia.
Topical corticosteroids like ACLOVATE (alclometasone dipropionate) are generally considered low risk in pregnancy, but systemic absorption can occur. Class C: Fetal risk cannot be ruled out. Avoid extensive use or prolonged treatment, especially in first trimester. Second and third trimester: Use only if clearly needed, minimal area and duration.
Albuterol is excreted into human breast milk in small amounts (M/P ratio not established). No reported adverse effects in nursing infants. Use with caution in lactating women; benefit of breastfeeding should outweigh potential risk to infant. Monitor infant for signs of beta-adrenergic stimulation (tachycardia, irritability).
Safety unknown; likely minimal systemic absorption due to low potency. M/P ratio not established. Avoid application to breasts or large areas; use caution.
No specific dose adjustment required; however, pharmacokinetic changes in pregnancy (increased volume of distribution, increased clearance) may theoretically require dose frequency adjustment. Use the lowest effective dose and monitor clinical response. No dose adjustment needed based on current evidence.
No standard dose adjustment required; however, limit potency, frequency, and duration to lowest effective due to altered skin permeability. No pharmacokinetic changes necessitate dose change.
Primarily a rescue inhaler for acute asthma exacerbations. Not for maintenance therapy. Shake well before each use. Prime with 3 test sprays when new or not used for >2 weeks. Use spacer device to improve lung deposition and reduce oropharyngeal side effects. Monitor for paradoxical bronchospasm. Tachycardia and hypokalemia can occur with overuse. Replace canister after 200 actuations.
Topical corticosteroids like Aclovate are classified as low-potency (Group VI). They are suitable for thin skin areas (e.g., face, flexures) and for children. Avoid prolonged use without interruption to minimize systemic absorption, especially in pediatric patients due to higher skin surface area-to-body weight ratio.
Use only as needed for shortness of breath, wheezing, or chest tightness.,Do not use more frequently than prescribed; overuse can lead to serious side effects.,Shake the inhaler vigorously for 5 seconds before each spray.,Prime the inhaler by releasing 3 test sprays into the air before first use or if not used for more than 2 weeks.,Use a spacer device if prescribed to improve medication delivery to the lungs.,Rinse mouth with water after each use to prevent thrush (oral fungal infection).,Seek immediate medical help if symptoms worsen or if you need more than 2 puffs per week for relief.,Store at room temperature away from moisture and heat; do not freeze.
Apply a thin layer to affected skin only, not to normal surrounding skin.,Do not cover with bandages or dressings unless directed by your doctor.,Use for the prescribed duration; do not use longer than 2 weeks at a time.,Avoid contact with eyes, mouth, and open wounds.,Report any signs of skin thinning, redness, or irritation to your healthcare provider.
No interactions on record
No interactions on record
Explore head-to-head clinical comparisons of other medications in the same therapeutic classes.
Common clinical questions about PROAIR HFA vs ACLOVATE, answered by our medical review team.
PROAIR HFA is a Beta-2 Agonist Bronchodilator that works by Selective beta-2 adrenergic receptor agonist; relaxes bronchial smooth muscle by increasing intracellular cyclic AMP.. ACLOVATE is a Topical Corticosteroid that works by Aclovate (alclometasone dipropionate) is a synthetic corticosteroid with anti-inflammatory, antipruritic, and vasoconstrictive properties. Its mechanism involves binding to glucocorticoid receptors, modulating gene expression to inhibit phospholipase A2, reducing arachidonic acid release, and decreasing prostaglandin and leukotriene synthesis.. They differ in pharmacokinetic profiles, FDA-approved indications, and side effect profiles.
Potency comparisons between PROAIR HFA and ACLOVATE depend on the specific clinical indication. These are agents from distinct pharmacological classes and are not directly interchangeable by dose. A physician or clinical pharmacist should guide any therapeutic switching decisions.
The standard adult dose of PROAIR HFA is: Two inhalations (90 mcg each) via oral inhalation every 4-6 hours as needed; for prevention of exercise-induced bronchospasm, two inhalations 15-30 minutes before exercise.. The standard adult dose of ACLOVATE is: Apply a thin film to affected skin areas twice daily. Not for ophthalmic, oral, or intravaginal use.. Dosing should always be individualized based on indication, renal and hepatic function, age, and other patient factors.
No direct drug-drug interaction has been formally documented between PROAIR HFA and ACLOVATE in current clinical databases. However, individual patient risk factors including other medications, organ function, and comorbidities should always be evaluated by a qualified healthcare provider.
The maternal-fetal safety profiles differ. PROAIR HFA is classified as Category C. FDA Pregnancy Category C. No adequate well-controlled studies in pregnant women. In animal studies, albuterol sulfate caused fetal malformations (cleft palate, limb defects) at dos. ACLOVATE is classified as Category C. Topical corticosteroids like ACLOVATE (alclometasone dipropionate) are generally considered low risk in pregnancy, but systemic absorption can occur. Class C: Fetal risk cannot be . Always consult a maternal-fetal medicine specialist before taking either drug during pregnancy or lactation.