Viagra is a brand name for the medication sildenafil, which is primarily used to treat erectile dysfunction (ED), a condition where a man has difficulty achieving or maintaining an erection during sexual activity. It belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors. Viagra works by inhibiting the enzyme phosphodiesterase type 5, which regulates blood fl... https://drugscripter.com/product-category/buy-viagra-online/