Antihypertensives are a class of medications that are utilized to treat hypertension (high blood pressure). Antihypertensive treatment looks to forestall the entanglements of hypertension, for example, stroke and myocardial infarction. These drugs comprise several classes of compound with the therapeutic intention of preventing, controlling, or treating hypertension. These drugs are used frequently in other unrelated conditions, for example, ?-blockers in thyrotoxicosis and anxiety, or angiotensin-converting enzyme inhibitors (ACEIs) in heart failure. Hence both the drug and its indication are relevant to the conduct of anaesthesia.