Usual Adult Dose for Hypertension:
Hydrochlorothiazide 12.5 to 25 mg-Olmesartan 20 to 40 mg orally once a dayComments:-If blood pressure is not controlled by olmesartan alone, hydrochlorothiazide may be added starting with a dose of 12.5 mg once a day; if blood pressure is not controlled by hydrochlorothiazide alone, olmesartan may be added starting with a dose of 20 mg once a day.-If large doses of hydrochlorothiazide have been used as monotherapy and volume depletion or hyponatremia is present, use caution when adding olmesartan as marked decreases in blood pressure may occur.  Consider reducing the dose of hydrochlorothiazide to 12.5 mg before adding olmesartan.-May be titrated every 2 to 4 weeks.
 Detailed Hydrochlorothiazide/olmesartan dosage information
