Zenvia is a drug that is a combination of the therapeutically active ingredient dextromethorphan and quinidine, the enzyme inhibitor for increasing the bioavailability of dextromethorphan. Zenvia is used for treating Involuntary Emotional Expression Disorder (IEED) and DPN pain.

Though the company received an approvable letter for using Zenvia to treat IEED in October 2006, the company has initiated a confirmatory Phase III study to cater for new lower quinidine dose formulation of Ze...

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