Metronidazole
"If I could give a neg 100 I would. I hate this drug. Horrible side effects, I'm still dizzy and have brainfog after 3 months. I had a severe headache, vomiting, severe anxiety, horrible brainfog, fatigue,  no appetite.  I still have anxiety! Cipro, or any fluoroquinolone are usually prescribed with this. I have to say shame on all the doctors who give any fluoroquinolone out since Bayer themselves and the FDA sent out warning letters.  FDA safety review found that both oral and injectable fluroquinolones are associated with disabling side effects involving tendons, muscles, joints, nerves and the central nervous system. These side effects can occur hours to weeks after exposure to fluoroquinolones and may potentially be permanent. "