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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 ]
Generic sildenafil (and brand-name Viagra) is a medication for the treatment of ED, Raynaud’s phenomenon, and pulmonary arterial hypertension. To understand how Viagra works, we need to look at ...
Viagra (or sildenafil) lasts three to five hours after it’s consumed. Cialis (tadalafil) has a half-life of 17.5 hours, meaning this drug lasts up to 36 hours after it’s consumed.
Sildenafil is the OG prescription medication for ED. It came onto the market in the late ’90s under the brand name Viagra. For several years, it was the only medication available for men with ED.
However, it remains difficult for a patient to ascertain whether an online pharmacy is legitimate. Medicines obtained from rogue online pharmacies come with no guarantees concerning their identity, history, and source. A study in three cities in the Netherlands found that over 60% of the consumed sildenafil was obtained from illegal sources. [12]
The name "herbal viagra" is taken from the brand name Viagra, under which drug company Pfizer sells sildenafil citrate, a drug used to treat erectile dysfunction. [3] Viagra has become a generic term for many people discussing drugs designed to treat erectile dysfunction, even those which do not contain sildenafil. [4]
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