One medication that produces and sustains an erection with adequate sexual desire is Vidalista 80 mg Vidalista 80 mg. It is typically used to treat impotence or erectile dysfunction. It is a pill, same as Cialis, and contains tadalafil as its active ingredient. The active components of Vidalista 80 mg enter the bloodstream rapidly. It should start acting in around 30 to 60 minutes and last for 36 hours, just like Cialis. However, this may differ from person to person. Drink a glass of water and swallow the tablet whole. Avoid chewing or crushing it. Never take Vidalista 80 mg without first talking to your physician. If you have ever experienced a side reaction to this medicine, do not use it.