Taking peppermint oil with other medicines and herbal supplements

Some medicines may affect how peppermint oil works.

Do not take indigestion medicines up to 2 hours before or after you take peppermint oil capsules. These include:

• antacids like Gaviscon (alginic acid) or Pepto-Bismol (bismuth subsalicylate)
• proton pump inhibitors (PPIs) such as omeprazole or lansoprazole
• H2 blockers such as nizatidine or famotidine

These can stop peppermint oil working as it should.

These are not all the medicines that may cause problems if you take them with peppermint oil. For a full list check the leaflet inside your medicine packet.