Not a curative treatment for angina attacks, nor an initial treatment for unstable angina pectoris or MI, nor in pre-hospital phase or during the 1st days of hospitalization. May aggravate or cause symptoms similar to those of Parkinson's disease. Parkinsonian symptoms persist >4 mth after discontinuation. May affect ability to drive & use machines. Moderate renal impairment. Not to be administered in childn <18 yr. Elderly (>75 yr).