The duration of Vidalista 20 is typically up to 36 hours, which provides flexibility for sexual activity during that time. It’s important to follow the prescribed dosage and consult with your doctor to ensure it’s appropriate for you. Tadalafil works by increasing blood flow to the penis in response to sexual arousal, helping men with ED achieve and maintain an erection. The medication can remain effective for up to 36 hours after taking it. This extended duration is why Tadalafil is sometimes referred to as the "weekend pill," allowing more spontaneity for sexual activity within that time frame.