Tadalafil is the active ingredient in the medicine Vidalista 20. The main indication for the phosphodiesterase type 5 (PDE5) inhibitor tadalafil is erectile dysfunction (ED) in males. A guy suffering from erectile dysfunction finds it difficult to get or keep an erection strong enough for sexual engagement. The effects of the medicine may persist for up to 36 hours, encouraging more impromptu sex. Observe the guidance provided by your physician. Vidalista 20 can be taken one tablet at least one hour before engaging in any sexual activity. For more information, speak with your pharmacist or doctor. Do not take more than once a day.