Safety, tolerability and efficacy of PN 200-110, a new calcium antagonist in patients with angina and coronary heart disease

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Abstract
The safety, tolerability and efficacy of PN 200-110, a new calcium antagonist with minimal negative inotropic effects, were studied in twelve patients with stable angina pectoris and coronary artery disease. The study design was single-blind and placebo-controlled and increasing doses of the drug were used on consecutive days to investigate a dose response relationship. Eleven patients completed the trial. Response to the drug was evaluated using symptom limited cycle ergometric exercise. PN 200-110 in all three tested doses of 2.5 mg, 5.0 mg and 10.0 mg significantly increased the resting heart rate (pp<0.02). Doses above 2.5 mg did not appear to improve the exercise parameters evaluated. Four patients had side effects probably due to PN 200-110 but these were mild and included dizziness, headache and flushing. There were no abnormal results from haematological and biochemical screening or from urine testing. We conclude that PN 220-110 can be given safely to patients with coronary artery disease without producing deleterious effects on blood pressure either at rest or during exercise.

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