bacterial vaginitis
"I have been on Metronidazole 500 Mg. 2x a day for 5 days, and every day I have had an insanely painful headache, lethargic, hard time concentrating and lack of appetite.  My Dr. did say that headaches are common and there is a cream form but I have decided to just fight through the side effects of the pill. My bacterial infection did clear up, and I saw signs of it clearing up within a day.  

It does help to take the pill on a full stomach, and drink ALOT of water!"