Juan 25mg Tablet is used 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. Juan 25mg Tablet may be taken on an empty stomach or with a meal. It should be strictly taken as advised by your doctor. 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. This medicine will only help you to get an erection if you are sexually stimulated. However, you should not take this medicine if you do not have erectile dysfunction. It should not be taken more than once a day. The most common side effects of this medicine are flushing, headaches, dizziness, blurred vision, muscle pain, stomach upset, and rash. Talk to your doctor if any of these side effects persist or bother you. They may be able to help you manage the side effects. This medicine is not intended for use by women and men should avoid using any other medicines to treat impotence without talking to a doctor first. It can be dangerous to take it along with medicines called nitrates (often given for chest pain or angina). Do not take this medicine if you have severe heart or liver problems, if you have recently had a stroke or heart attack or if you have low blood pressure. Let your doctor know if you suffer from these or any other health problems before taking it. You should not drive if this medicine makes you feel dizzy. Avoid drinking alcohol while taking this medicine as it increases the chances of side effects.