Metronidazole 500 mg is a 500 mg dose of the antibiotic metronidazole. It is used to treat certain types of bacterial infections.
According to drugs.com, metronidazole is a prescription medication that is used in treating infections of the vagina, skin, joints, stomach and respiratory tract. It will not, however, treat vaginal yeast infections or viral infections such as colds or flu.
Side effects that may occur while taking metronidazole include nausea, vomiting, a fast heartbeat, redness or warmth under the skin and a tingly feeling. If someone taking this medication experiences any side effects, he should notify the doctor at once.
Metronidazole should be taken exactly as prescribed. If a dose is missed, it should be taken as soon as the patient remembers.