Indications
Bismuth Subgallate is used mainly in creams, ointments and suppositories for haemorrhoids (piles) and minor anal irritation. It helps soothe and protect the area and reduce minor oozing and itching. It has also been taken by mouth to reduce odour from stools or wind, for example in people with a stoma.
How It Works
Bismuth Subgallate is an astringent: it tightens and dries irritated tissue and forms a protective layer over it. It also has mild antiseptic and deodorising effects. Very little is absorbed through the skin or the lining of the rectum.
Dosage and Administration
Apply the ointment or insert one suppository as directed on the label, usually after a bowel movement and at bedtime, and once or twice more each day if needed. Clean and gently dry the area first and wash hands after use. For oral use, take only as directed on the label or by a doctor.
Interactions
Interactions are unlikely with topical use. Do not use other rectal products at the same time unless your doctor advises it.
Contraindications
Do not use if you are allergic to bismuth salts or any ingredient of the product.
Side Effects
- Mild local burning, itching or irritation
- Allergic skin reaction (rare)
- Taken by mouth, it can darken the stools and tongue; this is harmless
Get urgent medical help if you have heavy rectal bleeding, severe pain, fever, or signs of a severe allergic reaction such as swelling of the face or difficulty breathing.
Pregnancy and Lactation
Short-term topical use is generally considered low risk because little is absorbed, but check with a doctor before using it during pregnancy or breastfeeding. Avoid long-term oral use in pregnancy.
Precautions and Warnings
- See a doctor if symptoms do not improve within 7 days or if there is bleeding, as these can be signs of other bowel conditions.
- Do not use large amounts by mouth for long periods; high bismuth intake has been linked to rare nerve and brain effects.
- For external or rectal use only unless the product is labelled for oral use.
Overdose
Overdose is unlikely with topical use. Large oral amounts over time may cause bismuth poisoning with confusion, tremor or unsteady walking; seek medical help.
Therapeutic Class
Astringent and protective agent (anti-haemorrhoidal).
Storage
Store below 30°C in a dry place, away from light and out of the reach of children. Keep suppositories in a cool place so they do not melt.
Prepared by the Oshud Alo team from standard drug references. For information only; always follow your doctor's advice.