Indications
Boric Acid is a weak acid made from the element boron. It is used in small amounts in medicines and personal care products: as a mild antiseptic and buffering agent in eye washes, ear drops, skin powders and ointments, and in some vaginal preparations prescribed for recurrent yeast infections. Some bone and joint supplements (for example combinations of calcium, vitamin D and minerals) use it as a source of boron, a trace mineral that may support bone health, though evidence is limited.
How It Works
On the skin and in the eye, boric acid slightly slows the growth of bacteria and fungi and helps keep the product at a comfortable, stable acidity. In supplements, the small amount of boron provided takes part in the body’s handling of calcium, magnesium and vitamin D.
Dosage and Administration
Use only as directed on the label of the specific product or by your doctor. Supplements contain only a few milligrams of boron per dose; do not take more than the label says. Topical, eye and ear products are for external use only. Vaginal capsules are inserted into the vagina, never swallowed, and only when prescribed.
Interactions
No important interactions are known at the small amounts used in supplements and topical products. Avoid using several boron-containing products at the same time.
Contraindications
- Allergy or sensitivity to boric acid
- Do not swallow topical, eye, ear or vaginal products
- Do not use on broken, raw or large areas of skin
- Do not use on infants or young children, including nappy area
- Vaginal boric acid in pregnancy
- Kidney failure (for supplements)
Side Effects
Topical or vaginal use may cause local irritation, burning or watery discharge. Supplements at label doses rarely cause side effects; stomach upset may occur.
Get urgent medical help if a product is swallowed in any significant amount, especially by a child, or if there is vomiting, diarrhoea, a red peeling rash, drowsiness or fits, as boric acid is poisonous in large amounts.
Pregnancy and Lactation
Do not use vaginal boric acid during pregnancy. Supplements containing boron should be used during pregnancy or breastfeeding only if your doctor advises. Small amounts in eye or ear drops are unlikely to be a concern, but ask your doctor.
Precautions and Warnings
Keep all boric acid products away from children; accidental swallowing can be fatal. Do not apply to large wounds or burns, where it can be absorbed. Stop using if irritation develops.
Overdose
Swallowing large amounts or heavy skin absorption can cause vomiting, diarrhoea, a bright red skin rash that peels, kidney damage, seizures and collapse. Seek emergency help at once.
Therapeutic Class
Antiseptic and buffering agent; boron source (trace mineral)
Storage
Store below 30°C in a dry place, away from light, tightly closed, and out of the reach of children.
Prepared by the Oshud Alo team from standard drug references. For information only; always follow your doctor's advice.