Sildenafil citrate, sold as Viagra, Revatio and under various other trade names, is a drug used to treat erectile dysfunction and pulmonary arterial hypertension (PAH). It was originally developed by British scientists and then brought to market by the US-based pharmaceutical company Pfizer.
Dapoxetine also known as Sustinex is a new drug that has gained most of the people's interest and it is used as a treatment for premature ejaculation. The generic name for the drug is dapoxetine hydrochloride. It is useful for men as a treatment for their inability to sustain ejaculation and is suffering from premature ejaculation. It is one of a unique drug of its kind which regulates the ejaculation process in males. Premature ejaculation means the biological problem due to which a man ejaculates sooner than his actual carvings. It is a common male dysfunction for many men that need to be treated as soon as possible.
Tadalafil Cialis is a PDE5 inhibitor, currently marketed in pill form for treating erectile dysfunction (ED) under the name Cialis; and under the name Adcirca for the treatment of pulmonary arterial hypertension.
Vardenafil is used to treat male sexual function problems (impotence or erectile dysfunction) by blocking a certain enzyme (phosphodiesterase-PDE5). In combination with sexual stimulation, vardenafil works by helping the blood flow into the penis to achieve and maintain an erection.