How and when to take sildenafil – NHS

Sildenafil citrate is a white to off-white crystalline powder with a solubility of 3.5 mg/mL in water and a molecular weight of 666.7. VIAGRA is formulated as blue, film-coated rounded-diamond-shaped tablets equivalent to 25 mg, 50 mg, and 100 mg of sildenafil for oral administration. Take your dose of VIAGRA about one hour before you intend to have sex. The amount of time VIAGRA takes to start working varies from person to person, but it normally takes between half an hour Tell your healthcare provider about all of the medicines you (or your child take). Do not take this drug with: Regular and/or intermittent use of nitric oxide donors (e.g, organic nitrates or nitrites) in any form; Guanylate cyclase stimulators (e.g, riociguat) Other PDE5 inhibitors or products containing sildenafil take viagra with water For treating ED specifically, Viagra is the well-known brand-name version of this drug. Many factors can influence how long Viagra takes to start working. In general, Viagra takes about 30 minutes Sildenafil under the name Viagra is used to treat erectile dysfunction (impotence) in men. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women. Do not take Viagra while also taking Revatio. Warnings

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

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