Metronidazole is an antibiotic. It fights bacteria in your body.
Metronidazole is used to treat bacterial infections of the vagina, stomach, skin, joints, and respiratory tract. This medication will not treat a vaginal yeast infection.
Metronidazole may also be used for purposes not listed in this medication guide.
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have any of these serious side effects:
numbness or tingling in your hands or feet;
white patches or sores inside your mouth or on your lips;
pain or burning when you urinate;
diarrhea that is watery or bloody;
vision problems, pain behind your eyes;
trouble concentrating, slurred speech, mood or behavior changes, tremors, muscle twitching, seizure (convulsions);
fever, chills, muscle pain, confusion, headache, sore throat, neck stiffness, increased sensitivity to light, drowsiness, nausea and vomiting; or
severe skin reaction – fever, sore throat, swelling in your face or tongue, burning in your eyes, skin pain, followed by a red or purple skin rash that spreads (especially in the face or upper body) and causes blistering and peeling.