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  • Title: Fenfluramine lowers plasma norepinephrine in overweight subjects.
    Author: Chernow B, Lake CR, Cook D, Coyle J, Hughes P, Coleman MD, Ziegler MG.
    Journal: Int J Clin Pharmacol Res; 1983; 3(4):233-7. PubMed ID: 6678821.
    Abstract:
    The effect of fenfluramine on sympathetic nervous system activity was determined in 12 normotensive, obese men. Supine plasma norepinephrine (NE) concentrations decreased (p less than 0.001) from pretherapy levels (298 +/- 39 pg/ml) after one (166 +/- 30 pg/ml) and four weeks (171 +/- 28 pg/ml) of fenfluramine (60 mg daily). Fenfluramine did not alter the sympathetic nervous system responses to orthostasis or exercise. Fenfluramine-induced decreases in heart rate (72 +/- 3 to 67 +/- 4 beats/min, p less than 0.01) and mean arterial blood pressure (90 +/- 2 to 81 +/- 2 mmHg; p less than 0.005) were observed after only one week of therapy despite no significant change in body weight. We conclude that fenfluramine may be a useful agent in the treatment of patients with sympathetic hyperactivity. The effects of fenfluramine on given subsets of patients and control subjects are also defined.
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