Bigfun 100 mg Tablet is used to treat erectile dysfunction in men. It works by improving blood flow to the penis, helping men achieve and maintain an erection when sexually aroused. The medicine relaxes blood vessels in the penis, allowing better blood flow during sexual stimulation.

You can take Bigfun 100 mg with or without food, about one hour before sexual activity. The onset time varies, but it typically starts working within 30 to 60 minutes. It only works when you're sexually stimulated, and should not be taken if you do not have erectile dysfunction.