CV 205‐502: A NEW LONG‐ACTING DRUG FOR INHIBITION OF PROLACTIN HYPERSECRETION

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Abstract
CV 205-502, an octahydrobenzo(g)quinoline, is a new non-ergot long-acting prolactin inhibitor. The substance was given to 24 hyperprolactinaemic women for 7 d. The women were randomized to one of three dose regimens, 0.01 mg, 0.03 mg or 0.06 mg daily. Two patients in each group were given placebo. Frequent blood samples were obtained during days 1, 7 and 8. The prolactin levels in serum were depressed dose-dependently in all patients given active substance. In group 1 (0.01 mg) the dose was insufficient to induce normal serum prolactin levels except in one woman, while two women in group 2 (0.03 mg) and four in groups 3 (0.06 mg) became normoprolactinaemic. The depressant effect on prolactin secretion lasted for 24 h in group 2 and 3. Side-effects were mild and transient. No change in blood pressure was observed. CV 205-502 was an effective and long-acting drug for treatment of patients with hyperprolactinaemia in this short-term study and this new drug deserves investigation of its usefulness in long-term treatment.

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