giardiasis
"I'm immunocompromised so sometimes end up with random bowel infections. I've been on a 2g stat dose of tinidazole a few times now. For violent bouts of uncontrolled and explosive diarrhea caused by suspected protozoal infections this stuff works amazingly, and quickly. Bad parts are the fatigue and metallic taste in your mouth (similar to radiotherapy) and no alcohol for 72 hours lest you end up with nasty issues."