Lonitab 5 mg contains the powerful hypertensive agent Minoxidil, which treats high blood pressure in adults. For children over the age of twelve, your doctor might change your daily dose to get the appropriate blood pressure levels. It belongs to a group of drugs known as vasodilators that work by relaxing blood vessels so that blood flows properly through them. You must talk to your doctor if you do not feel better or if your condition worsens. Your doctor may prescribe Minoxidil in combination with other drugs in case of severely high blood pressure.