Vidalista Tadalafil is a widely accessible medication used to treat erectile dysfunction. Both drugs require a prescription in most countries, however, some online vendors sell them without one. Even though they work similarly and are often taken in the same way, Vidalista and tadalafil are not the same. Consult a doctor before using anything. Tadalafil and the other phosphodiesterase type 5 inhibitors do not work in the absence of sexual stimulation.