medicines for blood clotting disorders or diabetes (e.g. warfarin)
medicines for some mental problems (psychiatric disorders)
medicines used to treat epilepsy (such as sodium valproate, carbamazepine, phenobarbital, phenytoin)
medicines for any heart trouble, or high blood pressure (e.g. Quinapril)
anti-biotics (e.g. tetracycline,rifampicin,rifabutin, penecillins, cephalosporins)
antihistamines for allergies
efavirenz or certain highly active protease-inhibitors (used to treat HIV)
halofantrine
tramadol (used to treat severe pain)
ketoconazole (used to treat fungal infections)
metoclopramide (used to treat nausea and vomiting)
etoposide (used to treat cancer)
medicines such as antacids containing aluminium, calcium or magnesium or other medicines containing iron, bismuth or zinc salts
Ciclosporin (used to affect the body's immune response following organ transplants)