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Viagra: Uses, Dosage & Side Effects Information

Publication date: 2018-04-22 13:49

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Tell all your healthcare providers that you take VIAGRA. If you need emergency medical care for a heart problem, it will be important for your healthcare provider to know when you last took VIAGRA.

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There is a potential for cardiac risk of sexual activity in patients with preexisting cardiovascular disease. Therefore, treatments for erectile dysfunction , including VIAGRA, should not be generally used in men for whom sexual activity is inadvisable because of their underlying cardiovascular status. The evaluation of erectile dysfunction should include a determination of potential underlying causes and the identification of appropriate treatment following a complete medical assessment.

Watermelon: A Natural Viagra? - WebMD

The most common side effects of VIAGRA: headache flushing upset stomach abnormal vision, such as changes in color vision
(such as having a blue color tinge) and blurred vision stuffy or runny nose back pain muscle pain nausea dizziness rash.

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Some medicines can cause unwanted or dangerous effects when used with Viagra. Tell your doctor about all your current medicines, especially riociguat (Adempas).

Watermelon may be a natural Viagra, says a researcher. That's because the popular summer fruit is richer than experts believed in an amino acid called citrulline, which relaxes and dilates blood vessels much like Viagra and other drugs meant to treat erectile dysfunction (ED).

This content has not been reviewed within the past year and may not represent WebMD's most up-to-date information.

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Watermelon is low in calories and provides potassium and the phytonutrients lycopene and beta-carotene, in addition to the citrulline.

At single oral doses of 655 mg and 755 mg, transient dose-related impairment of color discrimination was detected using the Farnsworth-Munsell 655-hue test, with peak effects near the time of peak plasma levels. This finding is consistent with the inhibition of PDE6, which is involved in phototransduction in the retina. Subjects in the study reported this finding as difficulties in discriminating blue/green. An evaluation of visual function at doses up to twice the maximum recommended dose revealed no effects of VIAGRA on visual acuity , intraocular pressure , or pupillometry.

"We have known that watermelon has citrulline," says Bhimu Patil, PHD, director of the Fruit and Vegetable Improvement Center at Texas A& M University, College Station. Until recently, he tells WebMD, scientists thought most of the citrulline was in the watermelon rind. "Watermelon has more citrulline in the edible part than previously believed," he says.

No evidence of teratogenicity, embryotoxicity or fetotoxicity was observed in rats and rabbits which received up to 755 mg/kg/day during organogenesis. These doses represent, respectively, about 75 and 95 times the Maximum Recommended Human Dose (MRHD) on a mg/m&sup7 basis in a 55 kg subject. In the rat pre-and postnatal development study, the no observed adverse effect dose was 85 mg/kg/day given for 86 days. In the nonpregnant rat the AUC at this dose was about 75 times human AUC.

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Viagra: Uses, Dosage & Side Effects Information Effect of Viagra

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