Side effects may include...

I participated yesterday in the Philadelphia Dragon Boat Festival, a great event on a picture-perfect day. I couldn't help but be amused by a team in a tent near ours, though -- one from whatever pharmaceutical giant manufactures Levitra, one of the popular ED drugs. Their uniform shirts had a big Levitra logo on back and banners on their tent proudly advertised their product. But I couldn't help but think that their team should have had a disclaimer: If you are still paddling with long, deep strokes after four hours, you should contact a physician immediately.