giardiasis
"I was (incorrectly) diagnosed with giardia and took Tindamax. I had a horrible reaction with nausea and diarrhea. This went on and I ended up hospitalized for days. The bad taste in your mouth lasts a LONG time after you take the medication. It takes a long time to clear your system as this is a long acting medication. The reaction I had sounds like what is supposed to happen if you drink alcohol while taking it. I am certain I did not drink alcohol, but I got this ill anyway. The real bummer is that after I took it I was told the lab made a mistake and I did not actually have giardia!!"