Levo-Albuterol hydrochloride is a chiral β2-sympathomimetic that acts on the β2-adrenergic receptors. The main effect is the relaxation of smooth muscle. An inhaler with Salbutamol can ease an asthmatic attack. The onset of action after a few seconds can be mitigated by other forms of administration (prolonged-release tablets) and delayed. In addition, salbutamol can be used as an anabolic and against tachycardia and tachyarrhythmia. Chirality affects efficacy, since only the (R)-enantiomer is active, it can be administered neatly. Since the counterpart has the same degradation mechanism, so the action time is extended. The (R)-enantiomer does not seem to possess a favorable profile of action.