Since I never even inhaled, I wouldn't know.

I've always been very conservative about taking any pills. If there is a side effect, I will have it. When my wisdom teeth were removed, the doc gave me Vicodin. I think the label said it "might cause drowsiness"; it knocked me out cold for 4 hours. A shot of Darvon after my wrist surgery made me loopy. I'd hate to think what illegal drugs would have done to me.