Sales of Impotence Drugs Go Limp, Defying Expectations

Well duh. Virtually everyone I've spoken to who has used one of the magic picker-uppers report severe, throbbing headaches, and while throbbing can be a good thing it is a bad thing when focused between the temples. At $4-5 bucks a pop and guaranteed to give you the skull blaster of your life, is it any wonder sales are flaccid?