Bacterial vaginosis can occur in monogamous relationships, and it can occur even when the woman s partners always use condoms. If a woman has no symptoms, even if Gardnerella is present in the vagina, usually no treatment is required. Do not drink alcohol during treatment or for 3 days afterwards, or you may get a severe hangover. Metronidazole may cause nausea or an upset stomach. Taking the tablets after meals can reduce these effects.
Some people notice an unusual taste in the mouth while taking metronidazole.
This taste resolves when the antibiotic course is completed. If someone is unable to take metronidazole, other treatments are available. These may not be as effective as metronidazole, but usually have fewer side effects. Tinidazole tablets are taken as a single dose. The side effects may be similar to those of metronidazole.