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In many of these studies, the researchers found more than 10 percent of men having intimacy with men used sildenafil citrate — and that its use is associated with higher risks of unprotected ...
Sildenafil could also cause an increased risk of heart attack or other heart problems. If you have an irregular heartbeat, hearing loss, vision loss, an allergic reaction, Peyronie’s disease, or ...
Sildenafil, sold under the brand name Viagra among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. [4] [8] It is also sometimes used off-label for the treatment of certain symptoms in secondary Raynaud's phenomenon. [9]
Sildenafil is most commonly prescribed to be taken one time per day in doses between 25 and 100 mg for ED. Your healthcare provider will determine the best dosage for you based on a number of factors.
Chemical structure of sildenafil (Viagra), the prototypical PDE5 inhibitor. A phosphodiesterase type 5 inhibitor (PDE5 inhibitor) is a vasodilating drug that works by blocking the degradative action of cGMP-specific phosphodiesterase type 5 (PDE5) on cyclic GMP in the smooth muscle cells lining the blood vessels supplying various tissues.
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Sildenafil (Viagra), tadalafil (Cialis) and vardenafil (Levitra) typically start working within 30 to 60 minutes, while avanafil (Stendra) works within 15 to 30 minutes. As with most prescription ...
That’s the 30-thousand-foot view, so let’s zoom in closer. ... By slowing down your body’s ability to absorb sildenafil, Viagra may take longer to work and produce less noticeable results ...