Levalbuterol is marketed as a 'pure' version of Albuterol because it contains only which isomer?
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Correct answer: The (R)-enantiomer
Standard Albuterol is a racemic mixture of (R) and (S) isomers. Levalbuterol contains only the (R)-enantiomer, which is responsible for the bronchodilatory effects, whereas the (S)-isomer was once thought to potentially promote inflammation.
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