Bismuth subnitrate is a mild astringent used in ointments and suppositories. It forms a protective film over irritated tissue, which reduces oozing and soreness. It is usually combined with other soothing ingredients rather than used alone.

What Bismuth Subnitrate Topicals Are Used For

  • Piles, including itching, soreness and minor bleeding
  • Anal fissures and irritation after passing hard stool
  • Minor skin and mucous membrane irritation

Common Side Effects

  • Local stinging or burning
  • Skin irritation with prolonged use
  • Staining of underclothes from the ointment base

Precautions

These products are for short term relief. Piles that keep bleeding, a lump that does not settle, or any change in bowel habit needs to be seen by a doctor rather than treated on repeat. Softening the stool with fibre and water usually matters more than the ointment. Keep it away from the eyes and do not apply to broken or infected skin without advice.

This page is general information only. It is not a substitute for advice from your doctor or pharmacist, and it does not include dosage. Always follow the directions given to you and read the leaflet inside the pack.

Medicines Containing Bismuth Subnitrate