Viagra
Viagra is a prescription drug that is used to treat erectile dysfunction (ED) and is taken orally.
Viagra is a kind of oral medication that is meant to be used by men who are suffering from erectile dysfunction (ED). Its generic name is sildenafil citrate and is manufactured by Pfizer.
Viagra comes in little blue diamond-shaped pills with the word Pfizer imprinted on the side.
It is also sold under different names, one of which is Revatio. Though it is perhaps the most popular medication used to treat ED, it has other competitors in the market including Cialis (tadafil) and Levitra (vardenafil).