Amlodipine tablets are calcium antagonist antihypertensive drugs, vasodilating blood pressure control, does not affect the electrolytes, will not affect the metabolism of blood potassium, so it will not cause the occurrence of potassium deficiency. Formal control of blood pressure requires long-term oral antihypertensive drugs, so if no side effects occur, blood pressure control is ideal, amlodipine tablets need to be taken orally for a long period of time, long-term oral amlodipine tablets do not affect the metabolism of electrolytes and discharge of potassium, so it will not cause potassium deficiency. In clinical practice, sometimes patients can’t control their blood pressure with oral amlodipine alone, so they will use other antihypertensive drugs, such as hydrochlorothiazide, indapamide, etc. These antihypertensive drugs are diuretic drugs or contain diuretic components, and the loss of electrolytes during diuresis may cause potassium deficiency. Patients who are allergic to the ingredients of this drug or have low blood pressure are not suitable for using this drug, its common side effects include flushing, headache, edema, gingival hyperplasia may occur in long-term oral use, etc. If these adverse reactions occur, it is necessary to change to other kinds of antihypertensive drugs. If potassium deficiency is detected during oral administration of amlodipine tablets, it is recommended to go to the endocrinology department for formal examination to clarify the cause of the disease and active treatment.