Stupid Human Tricks Taking Fish Antibiotics Isn't Wise, Say Experts, Unless You've Got Tail Rot or Body Slime (Washington Post) http://www.washingtonpost.com/wp-dyn/articles/A37306-2002Aug19.html Here's a new one: Guy with a bad sinus infection decides to treat it himself. Buys blister packs of penicillin and other antibiotics -- not at a drugstore but at a pet store. Takes medicines formulated for fish that don't require a prescription. Gets worse. Breaks down and goes to a clinic. For humans.