Cialis Drug Interactions

Other medicines and CIALIS: Tell the doctor if the patient is taking, have recently taken or might take any other medicines.
Do not take CIALIS if the patient is already taking nitrates.
Some medicines may be affected by CIALIS or they may affect how well CIALIS will work. Tell the doctor or pharmacist if the patient is already taking: an alpha blocker (used to treat high blood pressure or urinary symptoms associated with benign prostatic hyperplasia); other medicines to treat high blood pressure; riociguat; a 5-alpha reductase inhibitor (used to treat benign prostatic hyperplasia); medicines such as ketoconazole tablets (to treat fungal infections) and protease inhibitors for treatment of AIDS or HIV infection; phenobarbital, phenytoin and carbamazepine (anticonvulsant medicines); rifampicin, erythromycin, clarithromycin or itraconazole; other treatments for erectile dysfunction.
CIALIS with drink and alcohol: Information on the effect of alcohol is in Dosage & Administration. Grapefruit juice may affect how well CIALIS will work and should be taken with caution. Talk to the doctor for further information.