Alisartan is an antihypertensive drug that belongs to the class of renin angiotensin receptor antagonists (ARBs) and can be used in the treatment of mild to moderate essential hypertension. Alisartan is a renin angiotensin receptor antagonist, due to the strong vasoconstrictive effect of angiotensin II, this class of drugs can antagonize the binding of angiotensin II and the receptor, thus blocking the vasoconstrictive effect of angiotensin II. Alisartan has the effect of inhibiting cardiac remodeling, so this drug is indicated for patients with hypertension who have combined cardiac insufficiency. With the use of this drug, patients may experience adverse reactions such as fever, malaise, dizziness, palpitations, nausea, stomach upset, back pain and leg pain. In addition, the use of this drug is prohibited in patients who are allergic to aliskiren, patients with bilateral renal artery stenosis, pregnant and lactating women. If you need to use this drug, please do so under the supervision of a physician.