Olmesartan is an antihypertensive drug and is usually recommended to be taken orally as soon as you wake up in the morning. Olmesartan is an antihypertensive drug of the sartan class and may be used alone or in combination with other types of antihypertensive drugs. Overall, olmesartan is safe, but a few patients may experience peripheral edema or gastrointestinal reactions such as nausea, vomiting, and abdominal discomfort. The duration and amount of the drug may vary, even in combination with other drugs, and it is recommended to take the drug according to the doctor’s advice. Olmesartan is contraindicated in patients who are allergic to it. The initial dosage of Olmesartan may be reduced if the patient has insufficient blood volume or sodium intake.