- Anti-coagulants (blood thinning agents), such as warfarin.
- Lithium.
- Medicines used to treat epilepsy, such as phenytoin, primidone, phenobarbitone.
- 5-fluorouracil (for cancer).
- Busulfan for leukaemia (cancer of the blood cells).
- Ciclosporin (for organ rejection).
- Cimetidine (for stomach problems).
- Disulfiram (for alcoholism).