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Tell your health care provider if thai food main ingredients in viagra are taking any other medicines, especially any of the following: Alpha-blockers (eg, doxazosin), medicines for high blood pressure, nitrates (eg, isosorbide, nitroglycerin), or nitroprusside because severe low blood pressure with dizziness, lightheadedness, and fainting may occur Azole antifungals (eg, itraconazole, ketoconazole), H 2 antagonists (eg, cimetidine), HIV protease inhibitors (eg, ritonavir, saquinavir), macrolide antibiotics (eg, erythromycin), narcotic analgesics (eg, dihydrocodeine), or telithromycin because they may increase the risk of Viagra's side effects Bosentan or rifampin because they may decrease Viagra's effectiveness. 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. Important safety information: Viagra may cause dizziness, drowsiness, fainting, or blurred vision. These effects may be worse if you take it with alcohol viagra uk pay with paypal certain medicines. Use Viagra with caution.

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Detailed information

Viagra can decrease blood flow to the optic nerve of the eye, causing sudden vision loss. This has occurred in a small number of people taking sildenafil, most of whom also had heart disease, diabetes, high blood pressure, high cholesterol, or certain pre-existing eye problems, and in those who smoked or were over 50 years old. It is not clear whether sildenafil is the actual cause of vision loss. Viagra is not expected to harm an unborn baby.

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Jackson G "Treatment of erectile dysfunction in patients with cardiovascular disease : guide to drug selection. " Drugs 64 (2004): 1533-45. McMahon CG, Smali R, Johnson H "Efficacy, safety and patient acceptance of sildenafil citrate as treatment for erectile dysfunction.]