The Bigfun drug acts as the main ingredient in the drug sildenafil. Bigfun tablets are also found in different strengths. The Bigfun drug is taken 1 hour before sex, after which the effect lasts for 5-6 hours. With the use of these tablets, you can feel sex better. Bigfun tablets are widely used, and the effect lasts for a few hours after taking them. It is advisable to consult a doctor before taking Bigfun.