Olmesar A Tablet is used to treat high blood pressure. It contains contains Olmesartan and Amlodipine, which relaxes blood vessels and allows the blood to flow more smoothly and the heart to pump more efficiently. Thus, help to lower high blood pressure and reduces the risk of heart attack or stroke. It may cause side effects such as headaches, drowsiness, ankle swelling, nausea, dizziness, and low blood pressure. Before taking this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.