• birth control medicines (contraceptives) containing hormones, such as pills, injections, or
patches
• warfarin and acenocoumarol, medicines used to thin the blood
• digoxin, used to treat heart conditions
• medicines to treat fungal infections, such as ketoconazole, itraconazole, voriconazole and
posaconazole
• some calcium channel blockers, used to treat high blood pressure, such as diltiazem,
felodipine, nicardipine, nifedipine or verapamil
• medicines to treat cancer, such as cabazitaxel
• some medicines to lower fat (lipids) in the blood stream, such as gemfibrozil
• some medicines used to treat certain psychiatric conditions, such as haloperidol
• some antibiotics, such as clarithromycin, doxycyline and telithromycin
• some medicines for tuberculosis (TB), such as rifampicin
• some medicines that reduce cholesterol levels, such as atorvastatin and simvastatin
• some immunosuppressants, such as cyclosporin, tacrolimus and sirolimus
• some anti-inflammatory medicines, such as dexamethasone and methylprednisolone
• some medicines to treat HIV, such as ritonavir, amprenavir, indinavir, darunavir, delavirdine,
efavirenz, fosamprenavir, lopinavir, nelfinavir, tipranavir, saquinavir and atazanavir
• some medicines used for pain relief, such as fentanyl and methadone
• medicines to treat seizures (epilepsy), such as phenytoin, phenobarbital, primidone, valproic
acid or carbamazepine
• antidepressant medicines such as nefazodone and the herbal medicine St John’s wort
(Hypericum perforatum)