Megalis 20 Tablet is utilized to treat erectile dysfunction in men It increases blood flow to the penis to help men get an erection It works by helping to relax the blood vessels in your penis allowing blood to flow into your penis when you get sexually excited Megalis 20 Tablet may be taken on an empty stomach or with a meal It should be strictly taken as advised by your doctor The medication 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 Only take it if you need it and it has been recommended to you by a doctor The most common side effects of this medication are flushing headache blurred vision muscle pain stomach upset and rash Talk to your doctor if the side effects bother you or will not go away