Vidalista 20mg is an FDA-approved drug. It is used to treat men suffering from erectile dysfunction. The effect of this drug lasts for 36 hours. The drug is manufactured by Centurion Lab in India. vidalista 20 belongs to a group of drugs called phosphodiesterase type inhibitors. If you are taking a drug called nitrate, do not take a vidalista tablet and consult a doctor if you need to take it.