Metronidazole (Metrocream, Metrogel, Metrogel-Vaginal, Metrolotion, Flagyl) is an inexpensive drug used to treat certain kinds of bacterial and protozoal infections. This drug is more popular than comparable drugs. It is available in multiple generic and brand versions. Generic metronidazole is covered by most Medicare and insurance plans, but some pharmacy coupons or cash prices may be lower. Get Metronidazole for as low as $47.24, which is 75% off the average retail price of $189.09 for the most common version, by using a GoodRx coupon.