Tadalafil is the active ingredient in the medicine Vidalista 60. The main indication for the phosphodiesterase type 5 (PDE5) inhibitor tadalafil is erectile dysfunction (ED) in males. Like other tadalafil-containing drugs, Vidalista 60 mg does not automatically result in an erection; sexual stimulation is still necessary to provide the intended result. Vidalista effects linger for three to four hours. As a result, you will have an erection for three to four hours, or until you ejaculate. In a similar circumstance, do get a prescription from your physician.