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Sunday 15 May 2016

calcium-channel blocker with peripheral and coronary vasodilator properties{Diltiazem}



Diltiazem lowers blood

pressure and has some effect on cardiac conduction. Diltiazem interferes with the influx of calcium ions through the channels of active cell membranes.

Indication
Diltiazem is used for the prophylaxis and treatment of chronic stable (classical) and vasopastic angina pectoris and has also been used alone or in combination in the management of hypertension, also, Diltiazem is effective in myocardial infarction, coronary artery spasm, arrhythmias, Raynaud's phenomenon, oesophageal motility disorder and migraine.

Dosage & Administration
Adult: The usual dose is 60 mg thrice daily. However patient's response may vary and dosage requirements can
differ significantly between individual patients. If necessary, the divided dose may be increased to 180-00mg/day. Dosage may be started as 30 mg four times daily and increasing at 1 to 2 days intervals until the optimum response is achieved. Higher doses upto 480mg/day have been used with benefit in some patients especially in unstable angina. Elderly and patients with impaired hepatic or renal function : The recommended starting dose is 60 mg twice daily. The heart rate should be measurecfregularly and the dose should not be increased if the heart rate falls bejew 50 beats per minute.

Children: Not recommended.

Side-effect
With Diltiazem headache, ankle oedema, hypertension, dizziness, flushing, rashes (toxic erythema), nausea and Gl disturbances may occur. Transient elevation in liver enzyme values and occasionally hepatitis have been reported. Diltiazem may depress cardiac conduction and has occasionally led to AV block, bradycardia and rarely asystole or sinus
arrest. Contraindication Diltiazem is contraindicated to the patients of severe bradycardia, sick sinus syndrome, pregnancy, second or third degree AV block.

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