Sildenafil – Wikipedia
The pleiotropic effects of inducible nitric oxide synthase (iNOS) on the physiology and pathology of penile erection. Viagra (sildenafil) is an oral medication that treats erectile dysfunction (ED). It works by causing more blood flow to the penis. This helps you to achieve and maintain an erection. You can take Viagra 30 minutes to 4 hours before sexual activity. But it shouldn t be taken more than once daily. For most men, Viagra begins to work within an hour. The animals were divided into a control group and two experimental groups containing six rats each. The animals were treated with a solution of sildenafil citrate dissolved in distilled water. Histomorphological changes were observed by light microscopy and the levels of nitric oxide (NO) and PDE in the heart were measured by spectrophotometry. nitric oxide viagra But even though heart disease and erectile dysfunction are conditions many people experience in tandem, Viagra and nitrates aren t medications you want to mix. Prescription ED drugs like Viagra (active ingredient, sildenafil) make your blood vessels more sensitive to nitric oxide. If you take ED medications at the same time as nitrates, your Viagra can be taken after eating or on an empty stomach. However, if you take Viagra after a high-fat meal (e.g. fried food) you might find it takes longer to feel an effect. How does Viagra work? Viagra’s active ingredient (sildenafil citrate) increases blood flow to the penis. It enables a firmer, longer-lasting erection if you are sexually
Consistent with its known effects on the nitric oxide/cGMP pathway, VIAGRA was shown to potentiate the hypotensive effects of nitrates [see Dosage and Administration (2.3), Contraindications (4.1), Clinical Pharmacology (12.2)].
Your doctor will recommend the dosage of Viagra that s right for you. Form and strengths (25 mg, 50 mg, 100 mg) Viagra comes as an oral tablet, in these strengths: 25 milligram (mg), 50 mg, and Viagra usually starts working 30 60 minutes after taking a 50-milligram (mg) dose. It can then last for about 4 6 hours before the effects start to wear off. It can then last for about 4 6 can buy viagra singapore pharmacy Viagra dosage for erectile dysfunction (ED) is usually milligrams (mg), but those over 65 may start at 25 mg. Your doctor will also need to consider possible drug interactions. Sildenafil may be used to treat erectile dysfunction (ED or impotence) in men (Viagra brand) or pulmonary arterial hypertension in both men and women (Revatio