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Some of these products have been found to contain sildenafil (the active ingredient in Viagra) or a substance similar to vardenafil (the active ingredient in Levitra and Staxyn). Viagra is only available as an oral tablet, and there are also several generic versions of the drug available at a lower price. It should only be taken once a day, as needed. These medicines all work well for ED. When choosing one, tell your doctor or other health care professional what your preferences are, such as cost, ease of use, how long the drug’s effects last and side effects. Generic versions of sildenafil, vardenafil and tadalafil are available. were to buy viagra Buy Viagra Connect online at Boots.com Available to purchase in packs of 4, 8, tablets without a prescription (Subject to pharmacist or clinician approval) Transfer your prescription for Teva Pharma SILDENAFIL 25 MG TABLET (1 Tablet) on Amazon Pharmacy. FREE SHIPPING for Prime members. If you buy sildenafil for erectile dysfunction, it can also be known by the brand names Viagra, Aronix, Liberize and Nipatra. Sildenafil for pulmonary hypertension can also be known by the brand names Revatio and Grandipam. This medicine is available on prescription and you can also buy it from most pharmacies.

Viagra takes around 30 minutes to become effective and lasts about 4 hours. Cialis lasts much longer – up to 36 hours in some cases. Stendra can start doing its thing in as little as 15 minutes

Viagra (sildenafil) is a brand-name prescription drug that s used to treat erectile dysfunction (ED). Learn about side effects, warnings, dosage, and more. 4.1 Nitrates. Consistent with its known effects on the nitric oxide/cGMP pathway [see Clinical Pharmacology (12.1, 12.2)], VIAGRA was shown to potentiate the hypotensive effects of nitrates, and its administration to patients who are using nitric oxide donors such as organic nitrates or organic nitrites in any form either regularly and/or intermittently is therefore contraindicated. Sildenafil (Viagra) is a medicine used to treat erectile dysfunction (ED, also called impotence). Sildenafil works by helping to relax the blood vessels in the penis, allowing more blood to flow in and cause an erection. Sildenafil is the active ingredient in Viagra, as well as generic forms of Viagra with the same dose, purpose, and FDA label. From a chemical composition and scientific point of view, there are no differences between Viagra and sildenafil. same effect as viagra Taking sildenafil (Viagra) with medications, like oral azole antifungals and ritonavir (Norvir), can put you at higher risk for side effects, such as headaches, flushing, and vision changes. More on Sildenafil (Viagra) warnings

Compare Sildenafil vs Viagra head-to-head with other drugs for uses, ratings, cost, side effects and interactions. Sildenafil and Viagra do the same job, they both contain the active ingredient sildenafil citrate. The difference is that Viagra is the well-known branded ED drug first launched by Pfizer. Whereas generic sildenafil is the non-branded version and is made by a number of manufacturers. Viagra and sildenafil are exactly the same medication. Taking either of the two will help with improving blood flow to the penis. They have the same active ingredient which is sildenafil citrate.