Losartan (Cozaar) is a drug prescribed to treat high blood pressure, reduce the risk of stroke in those with hypertension, type 2 diabetes, diabetic neuropathy and kidney disease. Side effects include chest pain, diarrhea, dizziness, fatigue, nasal congestion, UTIs, and weakness. Losartan belongs to the Statin drug class. Dosing chart for angiotensin II receptor blockers (ARBs) including dosage forms, dosing recommendations, food effects, generic availability, and more DOSAGE AND ADMINISTRATION. The recommended starting dose of BENICAR HCT is 40/12.5 mg once daily in patients whose blood pressure is not adequately controlled with olmesartan monotherapy. 2.2 Pediatric Hypertension (6 to 16 years of age) Dosage must be individualized. For children who can swallow tablets, the usual recommended starting dose of Benicar is 10 mg once daily for patients who weigh 20 to 35 kg (44 to 77 lb), or 20 mg once daily for patients who weigh ≥35 kg. DOSAGE AND ADMINISTRATION Adult Hypertension. Dosage must be individualized. The usual recommended starting dose of Benicar is 20 mg once daily when used as monotherapy in patients who are not volume-contracted. Benicar is used to treat high blood pressure (hypertension). Learn about side effects, interactions and indications. Olmesartan (Benicar) is an oral medication used to treat high blood pressure. Learn about side effects, warnings, dosage, and more. Angiotensin Receptor Blocker (ARB) Antihypertensive Dose Comparison Brand (generic) Approximate Dose Equivalencies for Hypertensionb Avapro (irbesartan) How to use Benicar. Take this medication by mouth as directed by your doctor, usually once daily with or without food. The dosage is based on your medical condition and response to treatment. Olmesartan, sold under the trade name Benicar among others, is a medication used to treat high blood pressure, heart failure, and diabetic kidney disease. It is a reasonable initial treatment for high blood pressure. It is taken by mouth. Versions are avaliable as the combination olmesartan/hydrochlorothiazide and olmesartan/amlodipine.