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There are no controlled clinical data on the safety and efficacy of Viagra patients who suffered a myocardial infarction (heart attack), stroke, or life-threatening arrhythmia within the last 6 months. Viagra is usually taken only when needed, 30 minutes to 1 hour before sexual activity. Osol says that when given to pregnant rats with induced hypertension, Viagra: Helped arteries of the uterus grow as they should during pregnancy. "Hypertension decreases the growth and alters contractility of blood vessels in the uterus," Osol says, "but giving Viagra reversed these effects, resulting in improved function of the uterine circulation." Arterial diameters of Viagra-treated animals didn't quite match control (normal) values, "but were significantly larger than those with hypertension, suggesting that it may have increased blood flow to the uterus and placenta," Osol adds.

Megan Uehara, PharmD Q: Is there a generic viagra available? Effects of VIAGRA on Vision At single oral doses of 100 mg and 200 mg, transient dose-related impairment of color discrimination was detected using the Farnsworth-Munsell 100-hue test, with peak effects near the time of peak plasma levels. The cost is the same fore each tablet, whether it is the 25mg, 50mg, or the 100mg.

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Do not give Viagra to anyone under 18 years old without medical advice. Your doctor will also need to know if you are required to take any other medication that could react negatively with Viagra Connect. This includes nitroglycerin (Nitrostat, Nitrolingual, Nitro-Dur, Nitro-Bid, and others), isosorbide dinitrate (Dilatrate-SR, Isordil, Sorbitrate), and isosorbide mononitrate (Imdur, ISMO, Monoket). Researchers observed an increased amount of arousal sensations, vaginal lubrication, and orgasm in study participants.

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Food and Drug Administration (FDA), for the treatment of erectile dysfunction. VIAGRA may affect the way other medicines work, and other medicines may affect the way VIAGRA works, causing side effects.

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The FDA has established a reporting service known as MedWatch where healthcare professionals and consumers can report serious problems they suspect may be associated with the drugs and medical devices they prescribe, dispense, or use. Cardiovascular, side effects viagra and alcohol side effects and even the preliminary results. Before you take VIAGRA, tell your healthcare provider if you: have or have had heart problems such as a heart attack, irregular heartbeat, angina, chest pain, narrowing of the aortic valve or heart failure have had heart surgery within the last 6 months have pulmonary hypertension have had a stroke have low blood pressure, or high blood pressure that is not controlled have a deformed penis shape have had an erection that lasted for more than 4 hours have problems with your blood cells such as sickle cell anemia, multiple myeloma, or leukemia have retinitis pigmentosa, a rare genetic (runs in families) eye disease have ever had severe vision loss, including an eye problem called non-arteritic anterior ischemic optic neuropathy (NAION) have bleeding problems have or have had stomach ulcers have liver problems have kidney problems or are having kidney dialysis have any other medical conditions Tell your healthcare provider about all the medicines you take*, including prescription and over-the-counter medicines, vitamins, and herbal supplements. Impairment of Fertility There was no impairment of fertility in rats given sildenafil up to 60 mg/kg/day for 36 days to females and 102 days to males, a dose producing an AUC value of more than 25 times the human male AUC. Do not take VIAGRA if you take medicines called guanylate cyclase stimulators which include: Riociguat (Adempas®) a medicine that treats pulmonary arterial hypertension and chronicthromboembolic pulmonary hypertension.