Summary
Co-dergocrine mesylate (Cod), which inhibits norepinephrine secretion by stimulating presynaptic dopamine receptors, and has no known metabolic side effect, has an additive antihypertensive effect to that of Nifedipine (Nif). Plasma norepinephrine, epinephrine, renin activity and aldosterone have been measured after acute administration of Nif and Cod alone and in combination to 18 patients with a diastolic blood pressure > 105 mm Hg in a cross-over, randomized, double-blind study. Every patient received 4 mg Cod then 20 mg Nif, placebo then 20 mg Nif and 4 mg Cod then placebo. The second treatment was always given 1 h after the first medication. Blood pressure was measured before and every 15 min during the study period. Blood for measurement of catecholamines, aldosterone and renin activity was collected before medication, 1 h after the first dose and 90 min after the second treatment.
Blood pressure was significantly lower (P < 0.05) where Cod preceded Nif. Cod caused a significant decrease in plasma norepinephrine from 293 to 202 pg · ml−1 and in epinephrine from 67 to 55 pg · ml−1. The Nif-induced increase in norepinephrine from a pre-treatment value of 293 pg · ml−1 with preceding Cod to 331 pg · ml−1 was much less than the increase with placebo as premedication, from 284 to 440 pg · ml−1. Nif caused an increase in renin activity but no increase in aldosterone.
Nif-related side effects, such as flushing and headache, occurred in 6 patients of whom 5 had no received Cod as premedication. Due to the stabilizing action of Cod on catecholamines and on the side effects of Nif, Cod may be preferable to other antihypertensives in augmenting the antihypertensive action of Nif.
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Kirsten, R., Nelson, K., Weidinger, G. et al. Co-dergocrine mesylate inhibits the increase in plasma catecholamines caused by nifedipine in essential hypertension. Eur J Clin Pharmacol 39, 435–439 (1990). https://doi.org/10.1007/BF00280932
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DOI: https://doi.org/10.1007/BF00280932