With the use of Bigfun you can feel better about sex, i.e. if you are suffering from a problem like impotence, and are looking for a drug to solve it, then Bigfun is one of the best pills. Bigfun 100 is taken 1 hour before sex, after which the effect lasts for 4-5 hours. It is advisable to consult a doctor before taking Bigfun 100. BigFun 100mg is a bets drug used by men.