Product Name L-Albuterol
CAS Registry Number 34391-04-3
Molecular Formula C13H21NO3
Molecular Weight 239.31
Grade Pharmaceutical Grade
Appearance White cystalline powder
Levosalbutamol, also known as levalbuterol, is a short-acting β2 adrenergic receptor agonist used in the treatment of asthma and chronic obstructive pulmonary disease (COPD). Evidence does not show that levosalbutamol works better than salbutamol, thus there may not be sufficient justification for prescribing it.The drug is the (R)-(−)-enantiomer of its prototype drug salbutamol.
Levosalbutamol's bronchodilator properties give it indications in treatment of COPD (chronic obstructive pulmonary disease, also known as chronic obstructive lung disease) and asthma. Like other bronchodilators, it acts by relaxing smooth muscle in the bronchial tubes, and thus shortening or reversing an acute "attack" of shortness of breath or difficulty breathing. Unlike some slower-acting bronchodilators, it is not indicated as a preventative of chronic bronchial constriction.
Comparison to salbutamol
A 2013 systematic review of the drug's use as a treatment for acute asthma found that it "was not superior to albuterol regarding efficacy and safety in subjects with acute asthma." The review concluded: "We suggest that levalbuterol should not be used over albuterol for acute asthma."Levalbuterol is notably more costly.