Severe or unstable angina pectoris. Unresponsive left ventricular of various etiology & failure secondary to acute MI. During percutaneous transluminal coronary angioplasty to facilitate prolongation of balloon inflation. Prevent or relieve coronary spasm.
AdultIV 2-12 mg/hr; may adjust up to 20 mg/hr depending on patient's response. Intracoronary 1 mg as a bolus inj prior to balloon inflation. Max: 5 mg w/in 30-min period.
Patients w/ hypothyroidism, hypothermia, malnutrition, severe liver or renal disease, orthostatic syndrome. Development of tolerance; hypoxia particularly in patients w/ CAD leading to myocardial hypoxia; patients on controlled Na diet. Monitor BP & pulse rate. May affect ability to drive or operate machinery. Pregnancy & lactation.
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