Vidalista 40mg is a medication used to treat erectile dysfunction (ED) in men, containing the active ingredient tadalafil. The effects of Vidalista 40 mg can last for up to 36 hours after taking a dose. This long duration allows for greater spontaneity in sexual activity, as men can achieve an erection when sexually stimulated during this time. It is recommended to take the tablet about 30 minutes to an hour before planned sexual activity for optimal results. However, it is important to note that Vidalista 40 mg will only work if there is sexual arousal; it does not cause an erection on its own. Users should not take more than one tablet in 24 hours.