Developed and marketed by the pharmaceutical company Pfizer, the drug works by inhibiting cGMP specific phosphodiesterase type 5, an enzyme that administers blood flow in the penis. Non-invasive Easy to employ Safe with only some mild side-effects Helps in long-lasting erections Disadvantages of Viagra It is advised to administer the drug after due consultation with your healthcare provider as the drug may cause the following side-effects. Like other drugs, Viagra has some disadvantages irrespective of treating erectile dysfunction. Erections may not be as rigid, expected, or long lasting as required Takes up to an hour before to act,. Advantages of Viagra There are a number of advantages associated with Viagra. Sold under various trade names such as Viagra, Revatio and so on, Viagra, generically known as Sildenafil citrate, is a popular drug that is used to treat erectile dysfunction (ED) and pulmonary arterial hypertension (PAH). Its primary competitors available on the market are tadalafil (Cialis) and vardenafil (Levitra).

Available since 1998, this proven FDA approved medication is apt for males who are unable to maintain harder erections.