Irbesartan is used to treat high blood pressure (hypertension) and to help protect the kidneys from damage due to diabetes. Lowering high blood pressure helps prevent strokes heart attacks and kidney problems. Irbesartan belongs to a class of drugs called angiotensin receptor blockers (ARBs). It works by relaxing blood vessels so that blood can flow more easily.
Dizziness lightheadedness or upset stomach may occur as your body adjusts to the medication. If any of these effects persist or worsen tell your doctor or pharmacist promptly.
To reduce the risk of dizziness and lightheadedness get up slowly when rising from a sitting or lying position.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.