Sibutramine and L-carnitine compared to sibutramine alone on insulin resistance in diabetic patients

Giuseppe Derosa, Pamela Maffioli, Sibilla A T Salvadeo, Ilaria Ferrari, Alessia Gravina, Roberto Mereu, Angela D'Angelo, Ilaria Palumbo, Sabrina Randazzo, Arrigo F G Cicero

Research output: Contribution to journalArticlepeer-review


Objective To evaluate the effects of one year of treatment with sibutramine plus L-carnitine compared to sibutramine on body weight, glycemic control, and insulin resistance state in type 2 diabetic patients. Methods Two hundred and fifty-four patients with uncontrolled type 2 diabetes mellitus (T2DM) [glycated hemoglobin (HbA 1c) >8.0%] in therapy with different oral hypoglycemic agents or insulin were enrolled in this study and randomised to take sibutramine 10 mg plus L-carnitine 2 g or sibutramine 10 mg in monotherapy. We evaluated at baseline, and after 3, 6, 9, and 12 months these parameters: body weight, body mass index (BMI), glycated hemoglobin (HbA1c), fasting plasma glucose (FPG), post-prandial plasma glucose (PPG), fasting plasma insulin (FPI), homeostasis model assessment insulin resistance index (HOMA-IR), total cholesterol (TC), low density lipoprotein-cholesterol (LDL-C), high density lipoprotein-cholesterol (HDL-C), triglycerides (Tg), retinol binding protein-4 (RBP-4), resistin, visfatin, high sensitivity-C reactive protein (Hs- CRP). Results There was a decrease in body weight, BMI, HbA 1c, FPI, HOMA-IR, and RBP-4 in both groups, even when the values obtained with sibutramine plus L-carnitine were lower than the values obtained in sibutramine group. There was a faster decrease of FPG, PPG, TC, LDL-C, resistin and Hs-CRP with sibutramine plus L-carnitine even when no differences between the two groups were obtained. Furthermore, only sibutramine plus L-carnitine improved Tg, and visfatin. Conclusion Sibutramine plus L-carnitine gave a faster improvement of lipid profile, insulin resistance parameters, glycemic control, and body weight compared to sibutramine.

Original languageEnglish
Pages (from-to)1717-1725
Number of pages9
JournalInternal Medicine
Issue number16
Publication statusPublished - 2010


  • Insulin resistance
  • L-carnitine
  • Resistin
  • Sibutramine
  • Type 2 diabetes

ASJC Scopus subject areas

  • Internal Medicine

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