Efficacy and Safety of Midodrine and Atomoxetine for Neurogenic OH

Summary

This was a randomized, open-label clinical trial. We will enroll patients with symptomatic neurogenic OH and randomize them to 1 of 2 treatments: (1) midodrine only, (2) atomoxetine only. We will follow up patients at 1 and 3 months after treatment. If the patients meet BP criteria for OH at 1 month, they will receive combination treatment with both midodrine and atomoxetin. The primary outcome measure is amelioration of questionnaire score evaluating OH-associated symptoms at 3 months. Secondary end-points were improvement in orthostatic blood pressure (BP) drop at 1 and 3 months.

Timeline

Start

2018-01-01

Primary completion

2019-01-29

Completion

2019-03-15

Publications

• Background Consensus statement on the definition of orthostatic hypotension, pure autonomic failure, and multiple system atrophy. The Consensus Committee of the American Autonomic Society and the American Academy of Neurology. Neurology. 1996 May;46(5):1470. doi: 10.1212/wnl.46.5.1470. No abstract available.
• Background Smit AA, Halliwill JR, Low PA, Wieling W; New Collective Author. Pathophysiological basis of orthostatic hypotension in autonomic failure. J Physiol. 1999 Aug 15;519 Pt 1(Pt 1):1-10. doi: 10.1111/j.1469-7793.1999.0001o.x.
• Background Hiitola P, Enlund H, Kettunen R, Sulkava R, Hartikainen S. Postural changes in blood pressure and the prevalence of orthostatic hypotension among home-dwelling elderly aged 75 years or older. J Hum Hypertens. 2009 Jan;23(1):33-9. doi: 10.1038/jhh.2008.81. Epub 2008 Jul 24.
• Background Hale GM, Valdes J, Brenner M. The Treatment of Primary Orthostatic Hypotension. Ann Pharmacother. 2017 May;51(5):417-428. doi: 10.1177/1060028016689264. Epub 2017 Jan 16.
• Background Low PA, Singer W. Management of neurogenic orthostatic hypotension: an update. Lancet Neurol. 2008 May;7(5):451-8. doi: 10.1016/S1474-4422(08)70088-7.
• Background Wright RA, Kaufmann HC, Perera R, Opfer-Gehrking TL, McElligott MA, Sheng KN, Low PA. A double-blind, dose-response study of midodrine in neurogenic orthostatic hypotension. Neurology. 1998 Jul;51(1):120-4. doi: 10.1212/wnl.51.1.120.
• Background Parsaik AK, Singh B, Altayar O, Mascarenhas SS, Singh SK, Erwin PJ, Murad MH. Midodrine for orthostatic hypotension: a systematic review and meta-analysis of clinical trials. J Gen Intern Med. 2013 Nov;28(11):1496-503. doi: 10.1007/s11606-013-2520-3. Epub 2013 Jun 18.
• Background Izcovich A, Gonzalez Malla C, Manzotti M, Catalano HN, Guyatt G. Midodrine for orthostatic hypotension and recurrent reflex syncope: A systematic review. Neurology. 2014 Sep 23;83(13):1170-7. doi: 10.1212/WNL.0000000000000815. Epub 2014 Aug 22.
• Background Byun JI, Moon J, Kim DY, Shin H, Sunwoo JS, Lim JA, Kim TJ, Lee WJ, Lee HS, Jun JS, Park KI, Lee ST, Jung KH, Jung KY, Lee SK, Chu K. Efficacy of single or combined midodrine and pyridostigmine in orthostatic hypotension. Neurology. 2017 Sep 5;89(10):1078-1086. doi: 10.1212/WNL.0000000000004340. Epub 2017 Aug 9.
• Background Ramirez CE, Okamoto LE, Arnold AC, Gamboa A, Diedrich A, Choi L, Raj SR, Robertson D, Biaggioni I, Shibao CA. Efficacy of atomoxetine versus midodrine for the treatment of orthostatic hypotension in autonomic failure. Hypertension. 2014 Dec;64(6):1235-40. doi: 10.1161/HYPERTENSIONAHA.114.04225. Epub 2014 Sep 2.
• Background Hale GM, Brenner M. Atomoxetine for Orthostatic Hypotension in an Elderly Patient Over 10 Weeks: A Case Report. Pharmacotherapy. 2015 Sep;35(9):e141-8. doi: 10.1002/phar.1635.

Drugs

Indications