Composition OLMESARTAN 40mg & 20mg
Indication For management of Hypertension
Mechanism of Action

Olmesartan is a selective and competitive angiotensin II Type 1 (AT1) receptor antagonist that blocks the vasoconstrictor and aldosterone-secreting effects of angiotensin II. As a result, Olmesartan relaxes blood vessels, hence lowering BP and increases blood supply and oxygen to the heart.


Absorption: Bioavailability: Approx. 26%. Time to peak plasma concentration: Approx. 1-2 hr.

Distribution: Volume of distribution: 17 L. Plasma protein binding: ≤99%.s

Metabolism: Olmesartan medoxomil undergoes ester hydrolysis in the GI tract to active form Olmesartan.

Excretion: Via faeces (50-65%) and urine (35-50%) both as Olmesartan. Terminal half-life: Approx. 10-15 hr.

Side effects

Potentially Fatal: Acute renal failure.

May cause sprue-like enteropathy (Symptoms: Severe, chronic diarrhoea with substantial wt. loss). Dizziness, headache, abdominal pain, dyspepsia, diarrhoea, gastroenteritis, nausea, bronchitis, pharyngitis, rhinitis, arthritis, back pain, skeletal pain, fatigue, flu-like symptoms, angioedema, peripheral oedema, haematuria, UTI, hyperkalaemia, hypertriglyceridemia, hyperuricaemia, hyperglycaemia, elevated liver enzymes.


Patients with aortic or mitral valve stenosis, renal artery stenosis; at risk for hypotension (e.g. patients with volume or salt depletion); history of angioedema; at risk for hyperkalaemia (e.g. patients w/ DM). Severe renal and hepatic impairment. Lactation. Monitoring Parameters Monitor BP, serum creatinine and K levels periodically


Adult: Initial: 10-20 mg once daily may then be increased up to max 40 mg once daily if needed.

Child: 6-16 yr. 35 kg: 10 mg once daily; ≥35 kg: 20 mg once daily. Doses may be doubled once if necessary after 2 wk.

Elderly: No dosage adjustment needed

Renal impairment: Mild to moderate (Circle: 20-60 mL/min): Max: 20 mg once daily.

Moderate: Initial: 10 mg once daily may increase up to max 20 mg once daily.