Olmesartan ester, an angiotensin receptor antagonist, such drugs have side effects such as dry cough and edema, but are generally well tolerated with few side effects. Adverse reactions: may include dizziness, headache, cough, malaise, peripheral edema, abdominal pain, dyspepsia, hyperlipidemia, muscle pain, and more. However, the reactions are usually mild. If these uncomfortable symptoms occur after taking olmesartan ester, it is recommended to seek medical attention to clarify whether they are related to oral olmesartan ester, so that the treatment can be adjusted in time. Contraindications: renal artery stenosis can not be applied, as well as heart failure, such renal function depends on the activity of the renin-angiotensin-aldosterone system, the use of olmesartan ester such as angiotensin receptor antagonist, easy to deteriorate renal function, the use of pregnancy is also absolutely prohibited. Olmesartan ester tablets should be used under the guidance of a doctor, if the above mentioned symptoms of discomfort, should promptly go to the hospital.