How Viagra Works – HowStuffWorks

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. Teva sildenafil is a generic version of Viagra used to treat erectile dysfunction (ED) and some heart conditions. Learn more about Teva sildenafil and how to use it. what does viagra do exactly If you want to create a drug that increases blood flow to the penis, there are at least three ways to do it: Viagra uses method No. 3 – it eliminates the PDE that is decomposing the cGMP, so cGMP builds up in the penis and has a larger effect on the artery walls. Viagra (sildenafil) is a prescription drug that s used to treat erectile dysfunction (ED). The drug comes as an oral tablet. It s usually taken as needed about 1 hour before sexual activity.

Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly. How does sildenafil work? Sildenafil works by helping the blood vessels in the penis to relax. This allows more blood to flow in and cause an erection. If you have ED, this can make it easier to get an erection. Sildenafil doesn t cause erections on its own sexual stimulation is still needed. Sildenafil also does not: cure erectile does viagra work for impotence Of course, for those men who have already have erectile dysfunction before surgery, no amount of nerve sparing will return natural erections. Isn t Viagra very expensive? Viagra is indeed rather expensive. A box of four 100mg tablets (Viagra, Pfizer) will cost the NHS or you (by private prescription) 23.50 per box. Viagra (sildenafil) is a brand-name prescription medication. The Food and Drug Administration (FDA) has approved it to treat erectile dysfunction (ED).Doctors usually prescribe it to use as needed Obesity; Metabolic syndrome ; Parkinson’s disease; Drug use. Illicit drugs and certain prescription medications like barbiturates, antidepressants, and anti-seizure medications can actually cause or exacerbate ED or loss of libido as a side effect.