Tuesday, May 29, 2007

Before using Viagra

Some medical conditions may interact with Viagra . Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:
if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
if you have allergies to medicines, foods, or other substances
if you have life-threatening irregular heartbeat, uncontrolled high blood pressure, cancer of the blood (eg, leukemia, myeloma), bleeding disorders, or an active stomach ulcer
if you have a deformed penis or conditions that may cause a prolonged erection (eg, sickle cell anemia)
if you have kidney problems, bleeding disorders, active stomach ulcers, eye problems (eg, retina diseases like retinitis pigmentosa), or if you have ever had severe loss of vision

Some MEDICINES MAY INTERACT with Viagra . Tell your health care provider if you are taking any other medicines, especially any of the following:
Alpha-blockers (eg, prazosin), azole antifungals (eg, itraconazole), barbiturates (eg, phenobarbital), carbamazepine, delavirdine, H2 antagonists (eg, famotidine), HIV protease inhibitors (eg, indinavir), hydantoins (eg, phenytoin), ketolides (eg, telithromycin), macrolides (eg, erythromycin), mibefradil, nonnucleoside reverse transcriptase inhibitors (eg, efavirenz), rifabutin, rifampin, or ritonavir because side effects of Viagra may be increased
Anticoagulants (eg, warfarin), nitrates (eg, isosorbide ), nitroglycerin (eg, tablet, patch, ointment), or nitroprusside because the risk of side effects such as bleeding or severe low blood pressure may be increased
Bosentan because side effects may be increased by Viagra

This may not be a complete list of all interactions that may occur. Ask your health care provider if Viagra may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

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