Topiramate vs Metformin on Cardio-Metabolic Profile in Schizophrenia on Atypical Antipsychotics

Summary

Metabolic syndrome is common in patients of schizophrenia. It can add to morbidity, loss of functionality and discontinuation of antipsychotic medication. Apart from metformin, there are limited treatment options as add on-s to antipsychotics for treatment of metabolic syndrome. There have been placebo-controlled studies of Topiramate as an adjuvant but the present study would be the first head-on trial between these drugs for treatment of metabolic syndrome in patients of schizophrenia. If the outcome measures show a significant improvement with add on topiramate when compared with Metformin, then add on Topiramate can be a preferred treatment for metabolic syndrome in patients with schizophrenia on atypical antipsychotics. The adverse effects of Metformin can be side-stepped and Topiramate can also be given in conditions which are contraindications for Metformin. Thus, Topiramate can be a good alternative to metformin especially in conditions like liver, cardiac and renal impairment where metformin use should be avoided. Topiramate can not only improve metabolic parameters but can also have a beneficial effect on the symptom severity of schizophrenia. Thus, it can be a good augmentation drug to be used along with antipsychotics in these patients.

Timeline

Start

2022-09-20

Primary completion

2023-07-30

Completion

2023-08-20

Publications

• Background Saha S, Chant D, McGrath J. A systematic review of mortality in schizophrenia: is the differential mortality gap worsening over time? Arch Gen Psychiatry. 2007 Oct;64(10):1123-31. doi: 10.1001/archpsyc.64.10.1123.
• Background DE Hert M, Schreurs V, Vancampfort D, VAN Winkel R. Metabolic syndrome in people with schizophrenia: a review. World Psychiatry. 2009 Feb;8(1):15-22. doi: 10.1002/j.2051-5545.2009.tb00199.x.
• Background Rummel-Kluge C, Komossa K, Schwarz S, Hunger H, Schmid F, Lobos CA, Kissling W, Davis JM, Leucht S. Head-to-head comparisons of metabolic side effects of second generation antipsychotics in the treatment of schizophrenia: a systematic review and meta-analysis. Schizophr Res. 2010 Nov;123(2-3):225-33. doi: 10.1016/j.schres.2010.07.012. Epub 2010 Aug 7.
• Background Zheng W, Li XB, Tang YL, Xiang YQ, Wang CY, de Leon J. Metformin for Weight Gain and Metabolic Abnormalities Associated With Antipsychotic Treatment: Meta-Analysis of Randomized Placebo-Controlled Trials. J Clin Psychopharmacol. 2015 Oct;35(5):499-509. doi: 10.1097/JCP.0000000000000392.
• Background Flory J, Lipska K. Metformin in 2019. JAMA. 2019 May 21;321(19):1926-1927. doi: 10.1001/jama.2019.3805.
• Background Goh KK, Chen CH, Lu ML. Topiramate mitigates weight gain in antipsychotic-treated patients with schizophrenia: meta-analysis of randomised controlled trials. Int J Psychiatry Clin Pract. 2019 Mar;23(1):14-32. doi: 10.1080/13651501.2018.1449864. Epub 2018 Mar 20.
• Background Lawrence D, Hancock KJ, Kisely S. The gap in life expectancy from preventable physical illness in psychiatric patients in Western Australia: retrospective analysis of population based registers. BMJ. 2013 May 21;346:f2539. doi: 10.1136/bmj.f2539.
• Background Allison DB, Mentore JL, Heo M, Chandler LP, Cappelleri JC, Infante MC, Weiden PJ. Antipsychotic-induced weight gain: a comprehensive research synthesis. Am J Psychiatry. 1999 Nov;156(11):1686-96. doi: 10.1176/ajp.156.11.1686.
• Background Praharaj SK, Jana AK, Goyal N, Sinha VK. Metformin for olanzapine-induced weight gain: a systematic review and meta-analysis. Br J Clin Pharmacol. 2011 Mar;71(3):377-82. doi: 10.1111/j.1365-2125.2010.03783.x.
• Background Chen CH, Chiu CC, Huang MC, Wu TH, Liu HC, Lu ML. Metformin for metabolic dysregulation in schizophrenic patients treated with olanzapine. Prog Neuropsychopharmacol Biol Psychiatry. 2008 May 15;32(4):925-31. doi: 10.1016/j.pnpbp.2007.11.013. Epub 2007 Nov 17.
• Background de Silva VA, Suraweera C, Ratnatunga SS, Dayabandara M, Wanniarachchi N, Hanwella R. Metformin in prevention and treatment of antipsychotic induced weight gain: a systematic review and meta-analysis. BMC Psychiatry. 2016 Oct 3;16(1):341. doi: 10.1186/s12888-016-1049-5.
• Background Narula PK, Rehan HS, Unni KE, Gupta N. Topiramate for prevention of olanzapine associated weight gain and metabolic dysfunction in schizophrenia: a double-blind, placebo-controlled trial. Schizophr Res. 2010 May;118(1-3):218-23. doi: 10.1016/j.schres.2010.02.001. Epub 2010 Mar 7.
• Background Egger C, Muehlbacher M, Schatz M, Nickel M. Influence of topiramate on olanzapine-related weight gain in women: an 18-month follow-up observation. J Clin Psychopharmacol. 2007 Oct;27(5):475-8. doi: 10.1097/jcp.0b013e31814b98e5.
• Background Ellinger LK, Ipema HJ, Stachnik JM. Efficacy of metformin and topiramate in prevention and treatment of second-generation antipsychotic-induced weight gain. Ann Pharmacother. 2010 Apr;44(4):668-79. doi: 10.1345/aph.1M550. Epub 2010 Mar 16.
• Background Ince B, Altinbas K. [Ten-Year Risk of Cardiovascular Disease in Patients with Bipolar Disorder]. Turk Psikiyatri Derg. 2020 Winter;31(4):225-231. doi: 10.5080/u25270. Turkish.
• Background Tang Q, Li X, Song P, Xu L. Optimal cut-off values for the homeostasis model assessment of insulin resistance (HOMA-IR) and pre-diabetes screening: Developments in research and prospects for the future. Drug Discov Ther. 2015 Dec;9(6):380-5. doi: 10.5582/ddt.2015.01207.
• Background Kay SR, Fiszbein A, Opler LA. The positive and negative syndrome scale (PANSS) for schizophrenia. Schizophr Bull. 1987;13(2):261-76. doi: 10.1093/schbul/13.2.261.

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