Boric Acid Suppositories — Consumer Medicine Information and Ordering
Quick Answer: Boric acid suppositories are small, capsule-shaped vaginal inserts containing pharmaceutical-grade boric acid. They are used to treat recurrent bacterial vaginosis (BV) and vaginal yeast infections, particularly infections that haven’t responded to standard antibiotic or antifungal treatment. In Australia, boric acid suppositories are available on prescription from compounding pharmacies.
Recurrent bacterial vaginosis and persistent yeast infections affect a significant number of Australian women and can be frustrating to manage when standard treatments stop working. Boric acid suppositories have decades of clinical use as an alternative treatment for these conditions, and their effectiveness for recurrent infections is increasingly recognised in clinical guidelines.
This page covers what boric acid suppositories are, how they work, how to use them safely, and how to order a compounded preparation from NCC.
📄 Download Consumer Medicine Information (CMI) PDF
What Are Boric Acid Suppositories Used For?
Boric acid suppositories are used vaginally to treat:
- Recurrent bacterial vaginosis (BV): BV is caused by an imbalance in the vaginal bacterial environment. Standard treatment is metronidazole or clindamycin, but recurrence rates are high. Studies suggest 50–70% of women experience recurrence within 12 months. Boric acid is effective at restoring vaginal pH and reducing recurrence.
- Recurrent or azole-resistant vaginal yeast infections (candidiasis): Fluconazole and clotrimazole are first-line treatments for yeast infections, but some species, particularly Candida glabrata, show resistance to azole antifungals. Boric acid is effective against azole-resistant candida.
- Vulvovaginitis: Vaginal inflammation related to pH imbalance sometimes responds to boric acid when other treatments have been insufficient.
Boric acid suppositories are not a first-line treatment. They are typically prescribed when standard treatments have failed or when recurrent infection is a documented problem. If you are experiencing vaginal discomfort for the first time, see your GP before assuming boric acid is appropriate.
How Do Boric Acid Suppositories Work?
Boric acid (also known as hydrogen borate) acts as a mild antifungal and antibacterial agent in the vaginal environment. Its primary mechanism is acidification: boric acid lowers vaginal pH, creating an environment that is hostile to the bacteria and fungi responsible for BV and yeast infections.
The normal vaginal pH for reproductive-age women is 3.8–4.5 acidic, and dominated by Lactobacillus bacteria that produce lactic acid to maintain this environment. BV and candida overgrowth are associated with a rise in vaginal pH above this range. Boric acid restores the acidic environment that supports healthy vaginal flora.
It also has direct antifungal and antibacterial activity against a number of organisms, including Candida glabrata, which is the most common azole-resistant candida species encountered in clinical practice. For background on boric acid and vaginal pH, see our full guide.
How to Use Boric Acid Suppositories
Always follow the dosage and duration specified on your prescription. The following is general guidance that applies to most standard prescriptions:
- Step 1: Wash your hands thoroughly before handling the suppository.
- Step 2: Insert the suppository as deep into the vagina as possible, ideally using the applicator provided or your finger. Insertion is easiest lying down with your knees bent, or standing with one foot raised on the toilet.
- Step 3: Apply at night before sleeping as boric acid suppositories dissolve overnight. Insertion before sleep reduces leakage and maximises contact time.
- Step 4: Wear a panty liner to catch any discharge from the dissolving capsule.
- Step 5: Use for the duration specified on your prescription, typically 7–14 days for acute treatment, or up to 21 days for more resistant infections. Do not stop early even if symptoms resolve.
🔴 Do not use boric acid suppositories during pregnancy. Boric acid is harmful to a developing fetus and is contraindicated in pregnancy. If you are pregnant or trying to conceive, speak with your GP about alternative treatments.
🔴 Do not take boric acid orally. Boric acid suppositories are for vaginal use only. Oral ingestion of boric acid is toxic. Store out of reach of children.
Side Effects of Boric Acid Suppositories
Boric acid suppositories are generally well tolerated. The most commonly reported side effects are:
- Watery vaginal discharge during treatment – this is normal and expected as the suppository dissolves
- Mild vaginal discomfort, warmth, or irritation – usually settles after the first few days
- Redness around the vaginal opening – reduce if significant and contact your pharmacist or GP
Contact your doctor or pharmacist if you experience: significant burning or pain that does not settle within the first few days; pelvic pain; fever; or any unusual smell or discharge that concerns you.
Who Should Not Use Boric Acid Suppositories?
- Pregnant women as boric acid is harmful to a developing fetus and is contraindicated in pregnancy
- Anyone with open wounds or cuts in or around the vaginal area
- Children
- Anyone with a known sensitivity or allergy to boric acid
Use with caution and only under medical supervision if you have a compromised immune system or any other condition your doctor considers relevant.
Ordering Compounded Boric Acid Suppositories from NCC
NCC compounds boric acid suppositories for patients across Australia. Your GP or gynaecologist can prescribe boric acid suppositories. They will specify the dose (typically 600mg), capsule size, and duration. NCC will prepare your prescription fresh and dispatch it to you Australia-wide.
To order:
- Ask your doctor to prescribe compounded boric acid suppositories and to send the prescription to NCC, or obtain a written prescription to upload yourself.
- Upload your prescription via our online order system or contact our team directly.
- We compound and dispatch, typically within 2–5 business days of receiving a valid prescription.
Frequently Asked Questions — Boric Acid Suppositories
Are boric acid suppositories available over the counter in Australia?
No. Boric acid for vaginal use is not commercially available over the counter in Australia. It must be obtained from a compounding pharmacy on prescription. This is different from some other countries where boric acid suppositories are available without a prescription. You will need to see your GP or gynaecologist to obtain a prescription before NCC can compound your medication.
How long do boric acid suppositories take to work?
Symptom relief from BV is often noticed within 2–3 days, but the full course should be completed even if symptoms resolve earlier. For yeast infections, particularly azole-resistant strains, the full 14-day course is important. If symptoms have not improved after 7 days of treatment, contact your GP.
Can I have sex while using boric acid suppositories?
No, avoid vaginal intercourse and the use of barrier contraceptives (condoms or diaphragms) while using boric acid suppositories. Boric acid can degrade latex and may interfere with the effectiveness of condoms. Your prescriber will advise on when it is safe to resume sexual activity after completing your course.
What is the standard dose of boric acid for BV or yeast infections?
The most commonly prescribed dose is 600mg administered vaginally once daily at night, for 7–14 days. Some protocols extend to 21 days for resistant infections, or use a maintenance dose (e.g., twice weekly) after the acute course to prevent recurrence. Your prescriber will specify the dose, frequency, and duration appropriate for your situation.
Can boric acid suppositories be used during menstruation?
Treatment is generally paused during menstruation and resumed afterward. However, this depends on your prescriber’s protocol. Follow the instructions provided with your prescription.
Are there any drug interactions with boric acid suppositories?
No significant systemic drug interactions have been identified for boric acid used vaginally at standard doses, as systemic absorption is minimal. However, boric acid can interfere with the integrity of latex contraceptives. Do not use condoms or a diaphragm as contraception during treatment. Always inform your pharmacist and prescriber of all medications you are currently taking.
How do I store boric acid suppositories?
Store at room temperature, away from heat and direct sunlight. Do not refrigerate unless your prescription label specifies this. Keep out of reach of children as boric acid is toxic if ingested orally. Check the storage instructions on your dispensed prescription label as NCC’s pharmacist will confirm the appropriate storage conditions for your specific preparation.