bacterial infection
"An urgent Care Dr. prescribed Flagyl 500 mg 3 times a day for 10 days because of diarrhea and slight nausea from a possible parasite I caught in Mexico.  She didn't do the standard stool samples to confirm anything and started me on Flagyl.  I was fine from day 1-6.  However, day 7 was awful. I was so nauseous, my skin hurt and felt like it was on fire, my back hurt, I had a headache. I went to the ER on day 8 and they checked my blood, stool did a CT scan and nothing came back out of the ordinary. I completed the 10 days and am currently 6 days off.  My doctor said my stomach has suffered so much trauma it will take a while to get back to normal. I'm praying for some reprieve of this nausea."