To take Vidalista 20 mg correctly, follow your doctor's instructions. Typically, take one tablet with a glass of water 30-60 minutes before sexual activity. Do not exceed one dose per day. You can take it with or without food, but avoid high-fat meals as they may slow down the medication's effect. Swallow the tablet whole without crushing or chewing. Alcohol can reduce the effectiveness, so limit its intake. Always adhere to prescribed dosage and consult your doctor for any concerns or if you experience side effects.