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Boric Acid Suppositories

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Boric Acid Vaginal Suppositories: Everything You Need to Know


Boric Acid (BA) is an antiseptic and it helps to promote the normal pH (acid balance) in the vagina. It has anti-fungal and antibacterial properties plus destroys biofilms when used vaginally. It also never expires!

BA is available in gelatin or vegan capsules that can be inserted into the vagina (suppositories).  A typical dose is 600 milligrams per day, usually inserted at night before bedtime.



What are BA suppositories used for?

They are used to help treat yeast infections of the vagina (thrush). Symptoms can include itching, discomfort, thick (cottage cheese-like) vaginal discharge, burning when urinating, and pain during sex.

BA suppositories may be especially useful as an alternative treatment for recurrent vaginal yeast infections that keep occurring despite antifungal treatment. Boric acid is also highly effective for thrush resistant to fluconazole/or for diabetics who have a more persistent type of thrush.


BA suppositories are also an effective alternative treatment for Bacterial Vaginosis (BV) which is the result of an imbalance of “good” and “harmful” bacteria in the vagina.

BV often comes with a white or grey discharge with a strong odour. While most people do not experience any discomfort, sometimes there may be symptoms like vaginal discomfort or pain when urinating. 


How long does it take for BA suppositories to work?

Typically, within 1-3 days of starting treatment, you may notice improvements in symptoms. Many infections will resolve in 3 days, but some may take up to 7 days. If there is no improvement after 7 days, then this is almost diagnostic that something else is going on and further testing by a health practitioner is recommended.

BA suppositories can take up to 24 hours to completely dissolve. There is no absorption into the bloodstream. Fun fact - the BA doesn't actually dissolve only the outer capsule does. The BA doesn't even stay in the vagina but comes out in some exit water! It's very similar to how a mouthwash works.

BA suppositories side effects: 

BA suppositories have been used for many years as an effective treatment. Using them as per instructions is generally very safe. Side effects are mild and may include vaginal irritation or watery discharge (you may wish to wear a panty liner to protect your clothing from discharge from the suppository). No serious side effects or death have been reported.

You can use some lube if you are experiencing dryness plus you can use nappy rash cream with zinc if your vulva membranes are irritated. This helps to protect your skin barrier if it's degraded. Don't worry BA gets easier to tolerate as your overall symptoms resolve.

Some important restrictions to keep in mind:


Boric Acid shouldn't be used during pregnancy and is toxic to the developing fetus.

BA is poisonous when taken orally but dose-dependent (eg one capsule won't be fatal to a grown adult but will be harmful to a child).

It should only be used as a vaginal suppository and not consumed. Please keep out of reach of children.

When used as directed BA is considered a safe effective gentle treatment that has few if any adverse side effects for users who need them.


Antifungal mechanisms supporting boric acid therapy of Candida vaginitis

Francesco De Seta, Martin Schmidt, Bao Vu, Michael Essmann, Bryan Larsen

Journal of Antimicrobial Chemotherapy, Volume 63, Issue 2, February 2009, Pages 325–336,


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