Metronidazole and headaches

I started taking the Metronidazole (prescribed 1 tablet, 2x/day) 500 mg. After three days, I experienced fatigue, headaches, which got worse. By Friday, I had to leave work, and I was in bed w/flu-like symptoms: my head felt like it was to blow off, nausea, and hollow back pain in lower. I had to stop taking the meds. All symptoms subsided within one day, except my back hurts when I walk, and the headaches are infrequent but still remain. I called to report to my doctor. The nurse said that she had not heard of anyone having side effects from the drug.

I have been taking Metronidazole for 10 days 500mg 3 times a day for a bacteria in my colon and in all honesty i have the metallic taste in my mouth , nausea , headaches , and cannot get erect.. I think it has affected me sexually because i am taking so much of it..This is the worst medication i have ever been on.

I only took 5 400mg metronidazole tablets and had severe lower back pain headaches lightheadedness etc had to stop taking tablets. 2 weeks later still having pain but not so severe. How long does it take for the side effects to go away?

I've taken metronidazole twice in the past year for intestinal parasite. 700 mg, 3x a day for ten days.

I have an awful metallic taste in mouth, dark brown urine, lost of appetite, fatigue, and headaches. Some days are better than others.

I have found that drinking beverages at room temp with out ice helps along with hot food. Something to do with the temp of the food brings out the metalic taste.

I also chew gums and suck on peppermint candy to mask the taste.

headaches, drowsiness..diarrhea after drinking alcohol and dizziness ..all the while feeling unable to concentrate..foggy sort of