Effectiveness of Long-Term Versus Short-Term Treatment of Generalized Anxiety Disorder With Venlafaxine XR

Summary

This study will assess the effectiveness of venlafaxine XR, randomized to either venlafaxine XR or placebo in preventing the relapse of generalized anxiety disorder after 6 months of treatment versus 12 months of treatment.

Timeline

Start

2004-01

Primary completion

2009-09

Completion

2009-09

Publications

• Background Rickels K, Etemad B, Rynn MA, Lohoff FW, Mandos LA, Gallop R. Remission of generalized anxiety disorder after 6 months of open-label treatment with venlafaxine XR. Psychother Psychosom. 2013;82(6):363-71. doi: 10.1159/000351410. Epub 2013 Sep 20.
• Results Rickels K, Etemad B, Khalid-Khan S, Lohoff FW, Rynn MA, Gallop RJ. Time to relapse after 6 and 12 months' treatment of generalized anxiety disorder with venlafaxine extended release. Arch Gen Psychiatry. 2010 Dec;67(12):1274-81. doi: 10.1001/archgenpsychiatry.2010.170.
• Jung J, Tawa EA, Muench C, Rosen AD, Rickels K, Lohoff FW. Genome-wide association study of treatment response to venlafaxine XR in generalized anxiety disorder. Psychiatry Res. 2017 Aug;254:8-11. doi: 10.1016/j.psychres.2017.04.025. Epub 2017 Apr 14.
• Saung WT, Narasimhan S, Lohoff FW. Lack of influence of DAT1 and DRD2 gene variants on antidepressant response in generalized anxiety disorder. Hum Psychopharmacol. 2014 Jul;29(4):316-21. doi: 10.1002/hup.2404. Epub 2014 Apr 10.
• Cooper AJ, Narasimhan S, Rickels K, Lohoff FW. Genetic polymorphisms in the PACAP and PAC1 receptor genes and treatment response to venlafaxine XR in generalized anxiety disorder. Psychiatry Res. 2013 Dec 30;210(3):1299-300. doi: 10.1016/j.psychres.2013.07.038. Epub 2013 Aug 22.
• Cooper AJ, Rickels K, Lohoff FW. Association analysis between the A118G polymorphism in the OPRM1 gene and treatment response to venlafaxine XR in generalized anxiety disorder. Hum Psychopharmacol. 2013 May;28(3):258-62. doi: 10.1002/hup.2317. Epub 2013 May 8.
• Lohoff FW, Narasimhan S, Rickels K. Interaction between polymorphisms in serotonin transporter (SLC6A4) and serotonin receptor 2A (HTR2A) genes predict treatment response to venlafaxine XR in generalized anxiety disorder. Pharmacogenomics J. 2013 Oct;13(5):464-9. doi: 10.1038/tpj.2012.33. Epub 2012 Aug 21.
• Narasimhan S, Aquino TD, Multani PK, Rickels K, Lohoff FW. Variation in the catechol-O-methyltransferase (COMT) gene and treatment response to venlafaxine XR in generalized anxiety disorder. Psychiatry Res. 2012 Jun 30;198(1):112-5. doi: 10.1016/j.psychres.2011.12.034. Epub 2012 Mar 13.
• Lohoff FW, Aquino TD, Narasimhan S, Multani PK, Etemad B, Rickels K. Serotonin receptor 2A (HTR2A) gene polymorphism predicts treatment response to venlafaxine XR in generalized anxiety disorder. Pharmacogenomics J. 2013 Feb;13(1):21-6. doi: 10.1038/tpj.2011.47. Epub 2011 Oct 18.
• Narasimhan S, Aquino TD, Hodge R, Rickels K, Lohoff FW. Association analysis between the Val66Met polymorphism in the brain-derived neurotrophic factor (BDNF) gene and treatment response to venlafaxine XR in generalized anxiety disorder. Neurosci Lett. 2011 Oct 10;503(3):200-2. doi: 10.1016/j.neulet.2011.08.035. Epub 2011 Aug 26.

Drugs

Indications