PRODUCT INTRODUCTION Tadafil 20mg Tablet is used to treat erectile dysfunction (ED) in men and pulmonary arterial hypertension (PAH). It increases blood flow to the penis to help men get an erection. In PAH, it relaxes or widens the blood vessels inside the lungs, which reduces blood pressure in the lungs. Tadafil 20mg Tablet may be taken on an empty stomach or with a meal. It should be strictly taken as advised by your doctor. The medicine when taken for ED will only help you to get an erection if you are sexually stimulated. You should take it about one hour before you plan to have sex. The amount of time it takes to work varies from person to person, but it normally takes between 30 minutes and one hour.