Viagra drug interactions
See also How To Use Viagra
section for drug-food interactions.
This drug should not be used with the following
medications because very serious (possibly fatal) interactions
may occur: 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 sildenafil.
Before using this medication, tell your doctor
or pharmacist of all prescription and nonprescription products
you may use, especially of: other medications for impotence, azole
antifungals (e.g., itraconazole, ketoconazole), cimetidine, erythromycin,
mibefradil, rifamycins (e.g., rifampin), high blood pressure medicines,
delavirdine.
If you are taking an HIV protease inhibitor (e.g.,
ritonavir, saquinavir), do not take more than a 25mg dose of sildenafil
in a 48 hour period.
If you are taking more than a 25mg dose of sildenafil
and are also taking an alpha-blocker medication (e.g., doxazosin,
prazosin, terazosin) for various conditions (e.g., enlarged prostate),
separate the time between taking these medications by more than
4 hours.
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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