Vidalista 80 medicine is considered safe for people to take. The active ingredient, Tadalafil, has been tested for years and is known as a safe and easily tolerated drug. Vidalista has undergone vigorous testing in clinical trials and the results have determined that it is an effective and safe treatment for men suffering from ED. Vidalista 20 mg should not be taken by patients under 18 years of age. Tadalafil present in this medicine is known as the main ingredient.