What is Flagyl used for?

Flagyl (metronidazole) is used to treat bacterial and parasitic infections. It is effective against bacterial infections in various parts of the body, such as the gastrointestinal tract, reproductive system, skin, bones and joints, heart, lungs, nervous system, and blood. Flagyl (metronidazole) is also used to treat an intestinal disease called amoebiasis, caused by a parasite called Entamoeba histolytica. This medication is used to treat sexually transmitted diseases (STDs) such as trichomoniasis. Extended-release (long-acting) Flagyl tablets are used to treat vaginal infections (bacterial vaginosis) in women.

How does Flagyl work?

Flagyl (metronidazole) works by stopping the growth of susceptible anaerobic bacteria and parasites  

What is the dosage of Flagyl?

The dose of Flagyl (metronidazole) depends on the type of infection. The medication is available in 250 mg and 500 mg tablets and 375 mg capsules. It is important to finish the full course of treatment with Flagyl even if you start feeling better. 

Anaerobic bacterial infections: The typical dose is 7.5 mg/kg every 6 hours by mouth (approximately 500 mg every 6 hours for a 70 kg adult). The maximum dose is 4 grams/day. The treatment duration is 7-10 days, although some infections may require longer treatment.

Trichomoniasis: A 1-day treatment in females consists of a 2-gram dose by mouth, taken either as a single dose or in two divided doses of 1 gram each. A 7-day course to treat trichomoniasis in females consists of 250 mg 3 times a day or 375 mg 2 times a day for 7 days.

Vaginal infections (bacterial vaginosis): 2 grams single dose or 500 mg twice a day by mouth for 7 days. The dose of extended-release (Flagyl ER) is 750 mg once a day for 7 days.

Amoebiasis: 500-750 mg 3 times a day for 5-10 days.

The dose of Flagyl (metronidazole) in children is based on body weight.