Telmis H 40/12.5mg – Hypertension ComboTelmis H 40 12. 5mg Tablets Telmisartan + Hydrochlorothiazide for Hypertension Telmis H 40 12. 5mg Tablets are a combination of Telmisartan, an angiotensin II receptor blocker (ARB), and Hydrochlorothiazide, a thiazide diuretic. This combination medication is used to treat high blood pressure (hypertension) in adults whose blood pressure is not adequately controlled by Telmisartan alone. Telmisartan works by blocking the binding of angiotensin II to