治療心絞痛 高血壓 (CCB) Amlodipine is effective as once daily monotherapy in hypertension and angina pectoris.
藥理
Amilo (Amlodipine besylate) is a long-acting dihydropyridine calcium channel blocker that exerts its effect by blocking the transmembrane influx of calcium ions into cardiac and vascular smooth muscles. It also reduces peripheral vascular resistance and lowers blood pressure by causing a direct vasodilation in the peripheral arteries of the vascular smooth muscle. Its therapeutic effect on vasospastic angina is through inhibition of coronary spasm.
藥動學
Amilo (Amlodipine besylate) is well absorbed with onset of action about 30-50 mins and peak blood levels between 6-12 hrs. Bioavailability is 64~90%. Duration of action is 24 hours. Protein binding is 93%.The volume of distribution is approximately 21 L/kg. Amlodipine is extensively metabolized by the liver to inactive metabolites with 10% of the parent compound and 60% of metabolites excreted in the urine.
禁忌症
Patient with hypersensitivity to amlodipine or symptomatic hypotension (systolic pressure < 90 mmHg), or patient with advanced aortic stenosis.
懷孕分類
C
哺乳分類
Infant risk cannot be ruled out.
副作用
Dose related peripheral edema; headache, flushing, palpitations and GI disturbances.
劑量和給藥方法
5 to 10mg QD. Dose reductions may be indicated in the elderly or those with hepatic failure, but are not necessary in renal impairment.