Sildenafil Citrate, the primary ingredient in Bigfun, is used to treat male erectile dysfunction. It was first made available in 1998 and is currently the most widely used drug for erectile dysfunction. For up to four hours, sildenafil sublingual acts as a fast-acting medicine. It should be taken as prescribed by your doctor; usually, this is before engaging in sexual activity.
The drug can be taken up to four hours before engaging in sexual activity, however it normally takes effect thirty to sixty minutes after taking it. Recall that Bigfun requires sexual stimulation in order to create an erection.