While recovering from knee surgery, Judy Shurman took only three doses of the antibiotic Levaquin before she started feeling completely paranoid. “I locked the bedroom door. I wouldn’t let anybody in. At some point I was beside the bed hiding on the floor,” she said. The popular antibiotic carries the FDA’s “black box” warning, recommending that physicians and patients take great care prescribing or using the drug, due to a host of serious side effects. Other patients have reported a destroyed immune system, severe tendon damage, psychological distress, and central nervous system impairment, which may have been avoided had the side effects of the drug been clearly and fully communicated.