new form of salbutamol called Xopenex

You'll hear about a new form of salbutamol called Xopenex. It's being introduced now in the U.S...later in Canada.

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

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

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