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Cialis (Tadalafil) Drug interactions

See also How To Use Cialis section for drug-food interactions.

This drug should not be used with the following medications because very serious (possibly fatal) interactions may occur: certain alpha-blocker medication (alfuzosin, doxazosin, prazosin, terazosin, or doses greater than 0.4mg daily of tamsulosin), nitrates (e.g., nitroglycerin, isosorbide), nitroprusside (or any "nitric oxide donor" drugs), recreational drugs called "poppers" containing amyl or butyl nitrite.

If you are currently using any of these medications, tell your doctor or pharmacist before starting tadalafil.

Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: drugs that affect certain liver enzymes (CYP 3A4 substrates, inhibitors and inducers such as cimetidine, rifamycins, St. John's wort, or certain anti-seizure drugs), high blood pressure medicines, other medications for impotence.

If you are taking ritonavir, erythromycin, ketoconazole, or itraconazole (examples of potent inhibitors of CYP 3A4), do not take more than a 10mg dose of tadalafil in a 72 hour period. For more details contact your doctor or pharmacist.

NOTES:
Do not share this medication with others, since they may have a problem that is not effectively treated by this drug, or they may have a condition that is complicated by this drug.



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