Chronic treatment with phentermine combined with fenfluramine lowers plasma serotonin

Am J Cardiol. 2000 Apr 1;85(7):913-5, A10. doi: 10.1016/s0002-9149(99)00896-6.

Abstract

As expected on the basis of published research in both humans and animals, treatment with phentermine/fenfluramine lowers plasma 5-hydroxytryptamine [corrected], whereas treatment with phentermine had no significant effect. In light of these findings, future research should focus on mechanisms other than increased plasma 5-hydroxytryptamine [corrected] to explain how fenfluramine increases the risk of primary pulmonary hypertension and valvular heart disease.

Publication types

  • Clinical Trial
  • Comparative Study
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Administration, Oral
  • Diabetes Mellitus, Type 2 / blood
  • Diabetes Mellitus, Type 2 / complications
  • Diabetes Mellitus, Type 2 / drug therapy*
  • Double-Blind Method
  • Drug Therapy, Combination
  • Female
  • Fenfluramine / administration & dosage
  • Fenfluramine / pharmacokinetics
  • Fenfluramine / therapeutic use*
  • Heart Valve Diseases / blood
  • Heart Valve Diseases / etiology
  • Heart Valve Diseases / prevention & control
  • Humans
  • Hypertension, Pulmonary / blood
  • Hypertension, Pulmonary / etiology
  • Hypertension, Pulmonary / prevention & control*
  • Male
  • Middle Aged
  • Phentermine / administration & dosage
  • Phentermine / pharmacokinetics
  • Phentermine / therapeutic use*
  • Risk Factors
  • Selective Serotonin Reuptake Inhibitors / administration & dosage
  • Selective Serotonin Reuptake Inhibitors / pharmacokinetics
  • Selective Serotonin Reuptake Inhibitors / therapeutic use*
  • Serotonin / blood*
  • Sympathomimetics / administration & dosage
  • Sympathomimetics / pharmacokinetics
  • Sympathomimetics / therapeutic use*
  • Treatment Outcome

Substances

  • Serotonin Uptake Inhibitors
  • Sympathomimetics
  • Fenfluramine
  • Serotonin
  • Phentermine