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  • Title: The efficacy and tolerability of CV 205-502 (a nonergot dopaminergic drug) in macroprolactinoma patients and in prolactinoma patients intolerant to bromocriptine.
    Author: van der Lely AJ, Brownell J, Lamberts SW.
    Journal: J Clin Endocrinol Metab; 1991 May; 72(5):1136-41. PubMed ID: 1673685.
    Abstract:
    We studied the effect of CV 205-502 in 12 patients with macroprolactinomas and 8 patients with PRL-secreting tumors, who were selected because of previous repeatedly shown intolerance to bromocriptine in even small doses. We also investigated serum insulin-like growth factor-I (IGF-I) levels before and during CV 205-502 therapy. In 12 macroprolactinoma patients followed for 1 yr, 0.075-0.450 mg CV 205-502 lowered PRL levels by 91.2 +/- 5.4%. Only 3 of the patients had transient side-effects of nausea, dizziness, or fatigue. In eight patients with PRL-secreting tumors who were bromocriptine intolerant, CV 205-502 (0.075-0.300 mg daily) lowered PRL levels by 80.2 +/- 6.3%. Four of these patients showed transient side-effects (nausea, fatigue, and/or tachycardia). None of the patients discontinued therapy. There was a close correlation between pretreatment circulating PRL levels and tumor size, expressed in cubic millimeters. The decrease in pituitary tumor size after 52 weeks of CV 205-502 therapy (-74 +/- 6%) was also correlated with the decrease in PRL levels (P less than 0.01). In four patients with hypopituitarism, lowered IGF-I levels did not change during CV 205-502 therapy. However, in seven previously untreated patients with macroprolactinoma and normal CV 205-502 is a potent dopaminergic drug, which effectively controls PRL secretion and induces tumor shrinkage. At the doses used in our study, it causes only mild and transient side-effects in a minority of patients and can also be used to treat hyperprolactinemic patients who have shown intolerance to bromocriptine therapy.
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