Suhagra 100mg Tablet contains Sildenafil, it works by inhibiting the action of phosphodiesterase type-5 in the body, it helps in widening (relaxing) the blood vessels which increases blood flow to the penis and produces an erection in the penis. .Sildenafil was the first major erectile dysfunction (ED) medication on the market and was first popularized by Pfizer under the brand Viagra.Sildenafil helps men achieve an erection by relaxing arteries and increasing blood flow to the male genitalia. However, Sildenafil doesn’t trigger an erection on its own and sexual stimulation is still required