Bacterial vaginosis
A common change in vaginal bacteria causing discharge with a fishy smell. It is not a sexually transmitted infection.
How long does a course usually last?
Usually 5–7 days of tablets or gel, or a single dose in some cases.
Your prescriber sets the exact length for you. Finish the course you're given unless a healthcare professional tells you to stop.
Never re-use antibiotics
- Do not re-use this treatment, or take leftover or someone else's antibiotics, unless a healthcare professional has expressly told you to.
- The right antibiotic, dose and length depend on your current infection, which can be different from last time.
- Re-using antibiotics can be ineffective, cause side effects, and drives antibiotic resistance. Return leftovers to any pharmacy for safe disposal.
What the guidance says
Antibiotics as tablets, gel or cream usually clear bacterial vaginosis. It can come back; repeated episodes should be reviewed. See a sexual health clinic if you might have a sexually transmitted infection.
Based on NICE guidance — always follow your own prescriber's advice.
Antibiotics sometimes prescribed
When to seek help
If you are getting worse, develop a high fever, feel confused or breathless, or your symptoms are not improving as expected, contact your doctor or call NHS 111. See the warning signs page.