Vigora 100 mg, containing Sildenafil Citrate as its main active ingredient, belongs to the Phosphodiesterase type 5 (PDE5) inhibitors class of drugs. Sildenafil helps in treating Erectile Dysfunction by enhancing blood flow to the penis and helping one to attain an erection and fight impotence. Vigora 100 mg is an effective medication for Erectile Dysfunction (ED) and helps men attain or hold an erection.