PharmaceuticalBeta-2 agonistSympathomimeticBronchodilator

Salbutamol / Albuterol

Also known as Albuterol · Ventolin · ProAir

Written by enwyReviewed 15 Jul 20261 sources0 comments

Salbutamol (albuterol in the US) is a short-acting beta-2 agonist and one of the most widely used asthma reliever medications worldwide. It is sometimes used off-label for fat loss as a milder, shorter-acting alternative to clenbuterol, but its very short half-life and weaker thermogenic effect make it far less potent for that purpose.

01 Overview

Salbutamol is a selective beta-2 adrenergic agonist used as a rescue bronchodilator in asthma and COPD. It is extremely well characterised, with decades of clinical use across inhaled, oral and intravenous routes. Its safety profile at therapeutic inhaled doses is excellent.

As a fat-loss agent it is used off-label at oral doses, favoured by some because its short half-life clears quickly and side effects are more transient than clenbuterol. However the thermogenic effect is modest and tolerance to the metabolic effect develops. Oral use carries the same sympathomimetic side effects as other beta agonists.

02 Mechanism

Short-acting selective beta-2 adrenergic agonist. Relaxes bronchial smooth muscle and produces a modest, transient increase in metabolic rate and lipolysis.

03 Dosing

Tier	Dose	Route	Notes
Off-label oral	4–8 mg/day	Oral	Off-label fat-loss oral dosing; sympathomimetic effects similar to other beta agonists.
Asthma reliever	100–200 mcg	Inhaled	Standard inhaled rescue dose, repeated as needed.

04 Effects

Effect	Magnitude	Evidence
BronchodilationFast relief of bronchospasm, its licensed use.	rapid relief	Clinical
Modest thermogenesisSmall transient increase in metabolic rate at oral doses; weaker than clenbuterol.	small, transient	Observational

05 Side effects

Effect	Severity	Frequency	Evidence
TremorFine tremor and jitteriness, dose-dependent and more pronounced with oral use.	Mild	Very common orally	Clinical
TachycardiaIncreased heart rate and palpitations, especially with oral or high inhaled doses.	Mild	Common	Clinical
HypokalaemiaBeta-agonists drive potassium into cells, lowering serum potassium at high or repeated doses.	Moderate	With high/frequent doses	Clinical

06 Legal status

United States

Prescription drug

FDA-approved reliever medication; WADA restricts non-inhaled and high-dose use in sport. · as of Jan 2026

07 References

Albuterol (salbutamol) — pharmacology and clinical useStatPearls / NCBI Bookshelf

08 Discussion0 comments

Create account

Discussion is moderated. No sourcing, vendor names or price talk — those comments are removed, and repeat posts are banned.

This page is reference information, not medical advice. Doses and protocols are documented as they appear in the clinical literature and in practice — describing them is not a recommendation to use them. Countermeasures listed here are not a substitute for a physician. Legal status varies by jurisdiction and changes.