Metronidazole (brand name Flagyl) is an antibiotic medicine used to kill certain bacteria that cause skin and soft tissue abscesses, sexually transmitted diseases (STDs), giardia, some vaginal and amoebic infections.
Stomach upset, nausea and constipation are common side effects of metronidazole. You can minimize these effects by taking your dose with a meal, or a snack and a glass of milk, and sticking to simple foods.
For the diarrhea try eating yoghurt and be sure to drink water and stay hydrated. Antibiotic-associated diarrhea, while unpleasant, is usually a short-lived side effect and will usually clear up a few days after antibiotics are stopped.
If you simply cannot tolerate the side effects, speak with your health care provider about what other options you might have.
For more information visit: