Taking or using metronidazole with other medicines and herbal supplements

Metronidazole may not mix well with some other medicines. This can be a problem with metronidazole tablets, suppositories, liquid or vaginal gel. It is not usually a problem if you are using a skin gel or cream, as only a small amount of metronidazole is absorbed into the body.

Check with a pharmacist or your doctor if you're taking any other medicines, including:

• warfarin, a medicine that helps to treat and prevent blood clots
• lithium, used to treat some types of mental health conditions
• disulfiram, used to help people stay off alcohol
• phenytoin or phenobarbitone, used to treat epilepsy
• ciclosporin, used to reduce the activity of the immune system
• fluorouracil or busulfan, used to treat some types of cancer
• any medicines that you take as a liquid, in case these contain alcohol

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