These results demonstrated that the effect of VIAGRA on the primary endpoint was statistically non-inferior to placebo. Results with all doses have been pooled, but scores showed greater improvement at the 50 and mg doses than at 25 mg. You can take sildenafil with or without food. If you experience chest pain, dizziness, or nausea during sex, seek immediate medical help. If you experience chest pain, dizziness, or nausea during sexual activity, call your doctor immediately and avoid sexual activity until your doctor tells you otherwise. Maximum observed plasma concentrations are reached within 30 to minutes median 60 minutes of oral dosing in the fasted state. Sudden vision loss in one or both eyes can be a sign of a serious eye problem called non-arteritic anterior ischemic optic neuropathy NAION.Still, if your doctor says it’s okay for you to use and you end up paying out-of-pocket, you can still get the generic for a lot less than Viagra. According to price-comparison site test1.ru Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Sildenafil (Liqrev, Revatio) is used to improve the ability to exercise in adults (Liqrev, Revatio) and children 1 year of age and older (Revatio) with pulmonary arterial hypertension (PAH; high blood pressure in the vessels carrying blood to the . Yes. Walmart Pharmacy offers an easy prescription experience, from medication refills with just a few clicks to low-cost generic meds starting at just $4. You can also transfer your .