The time it takes for Bigfun to start working varies from person to person, but it normally does so in 30 to 60 minutes. After it becomes active, it remains effective for four to six hours, providing a window of opportunity for better erectile performance.

Men with erectile dysfunction (ED) can be treated with the drug Bigfun 100. An erection that is firmer and lasts longer is produced by sildenafil citrate, which increases blood flow to the penis.

This drug is classified as a PDE5 inhibitor. Sildenafil citrate is the generic medication used to treat erectile dysfunction or impotence in men. The active component of Bigfun, sildenafil citrate, is a type 5 (PDE5) selective inhibitor. The smooth muscles in the penile area relax when this enzyme is selectively inhibited.