This medication is used before physical activities (such as exercise sexual activity) to prevent chest pain (angina) in people with a certain heart condition (coronary artery disease). It may also be used to relieve chest pain in these people once it occurs.
Isosorbide dinitrate belongs to a class of drugs known as nitrates. Angina occurs when the heart muscle is not getting enough blood. This drug works by relaxing and widening blood vessels so blood can flow more easily to the heart.
Headache dizziness lightheadedness nausea and flushing may occur. If any of these effects persist or worsen tell your doctor or pharmacist promptly.
Headache is often a sign that this medication is working. Your doctor may recommend treating headaches with an over-the-counter pain reliever (such as acetaminophen aspirin). If the headaches continue or become severe tell your doctor promptly.