The possible categorical responses to these questions were 0 no attempted intercourse, 1 never or almost never, 2 a few times, 3 sometimes, 4 most times, and 5 almost always or always. Store in the original package, in order to protect from moisture. Efficacy Results from Controlled Clinical Studies The effect on one of the major end points, maintenance of erections after penetration, is shown in Figure 6, for the pooled results of 5 fixed-dose, dose-response studies of greater than one month duration, showing response according to baseline function. Prolonged erections can be dangerous. Sildenafil treats PAH by relaxing the blood vessels in the lungs to allow blood to flow easily.Prices for Sildenafil (Viagra) are as low as $ with a GoodRx coupon. See coupons. What are the side effects of Sildenafil (Viagra)? 25mg. 50mg. mg. Typical dosing for Sildenafil (Viagra) The typical dose is to take 50 mg of sildenafil (Viagra) by mouth, about 1 hour before sex, as needed. The maximum recommended dose is . Headache, flushing, and upset stomach are common Viagra side effects. These effects are usually mild and often resolve on their own. While rare, Viagra can cause an erection that lasts longer than 4 hours (priapism). This can result in permanent damage if left untreated. Vision changes are also possible. “Viagra (Sildenafil) 25mg Tablets will improve your intimate relationships. a reliable approach to better performance and fulfillment. Do it now.” info@ .

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