Xopenex (Zo-pen-ex), a new form of albuterol solution

May 1999

Some asthma patients will be using Xopenex (Zo-pen-ex), a new form of albuterol solution...for use in nebulizers.

Xopenex is levalbuterol...the R-isomer of albuterol. Albuterol is a mixture of both "R" and "S" isomers.

This is the latest example of the trend towards separating isomers...to see if one is more effective or less toxic.

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