• J. Diabetes Complicat. · Jul 2008

    Randomized Controlled Trial

    The effect of venlafaxine HCl on painful peripheral diabetic neuropathy in patients with type 2 diabetes mellitus.

    • Ali Kemal Kadiroglu, Dede Sit, Hasan Kayabasi, Alpaslan Kemal Tuzcu, Nebahat Tasdemir, and M Emin Yilmaz.
    • Department of Nephrology, Dicle University Medical Faculty, Diyarbakir, Turkey.
    • J. Diabetes Complicat. 2008 Jul 1;22(4):241-5.

    ObjectiveThe objective of this study was to evaluate the efficacy of venlafaxine HCl in the symptomatic treatment of painful peripheral diabetic neuropathy (PPDN) among patients with type 2 diabetes mellitus (DM).DesignThis study was designed as a prospective, randomized, and controlled trial.SettingThis study was conducted at the Dicle University Medical Faculty (Diyarbakir, Turkey).PatientsSixty type 2 DM outpatients (47 females and 13 males) with PPDN who had a minimum visual analog scale (VAS) score of 40 mm were enrolled in this study.InterventionsPatients randomized to the treatment group (n=30) received venlafaxine HCl, whereas those randomized to the control group (n=30) received a combination of vitamins B(1)and B(6) tablets.MeasuresSeverity of pain was measured by VAS, Short-Form McGill Pain Questionnaire, and numerical analog scale scores at admission and at the second, fourth, and eighth weeks of the study. Polyneuropathy was supported by electromyelography.OutcomeIn the treatment group, severity of pain was measured as 70.0+/-13.0 in the VAS, as 24.9+/-6.2 in the Short-Form McGill Pain Questionnaire, and as 7.2+/-1.1 in the numerical analog scale. In the control group, it was measured as 73.0+/-8.0 in the VAS, as 26.8+/-6.2 in the Short-Form McGill Pain Questionnaire, and as 7.4+/-0.8 in the numerical analog scale (P>.05).ResultsThe most common form of PPDN was distal symmetrical sensorimotor polyneuropathy in both groups (46.8% vs. 50.0%). At the end of the study, there was a significant difference in severity of pain between the groups. In the treatment group, scores were 8.5+/-5.2 and 3.1+/-1.6 in the Short-Form McGill Pain Questionnaire and numerical analog scale, respectively; in the control group, these were 20.5+/-7.0 and 5.5+/-1.6, respectively (P<.001).ConclusionsVenlafaxine HCl is a safe and well-tolerable analgesic drug in the symptomatic treatment of PPDN; however, it has minimal adverse effects. It showed its efficacy markedly in the second week of therapy.

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