Telmis 40mg Tab Box is a medication belonging to the angiotensin II receptor blocker (ARB) class, primarily used to treat hypertension (high blood pressure) in adults. The active ingredient, telmisartan, works by blocking the effects of angiotensin II, a substance that narrows blood vessels and increases blood pressure. By blocking these effects, these tablets help to relax blood vessels, lower blood pressure, and improve blood flow. These tablets are used alongside lifestyle changes such as diet adjustments and exercise to effectively manage hypertension in patients.