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Norepinephrine Reuptake Inhibitors Have Negative Effect on Postural Tachycardia Syndrome (POTS)

  [ 5 votes ]   [ 1 Comment ]
www.ProHealth.com • September 5, 2013

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Editor's comment:  Postural Tachycardia Syndrome (POTS), a form of orthostatic intolerance, often occurs with fibromyalgia and ME/CFS.  Since serotonin and norepinephrine reuptake inhibitors like Cymbalta and Savella are frequently prescribed for fibromyalgia, it is important to know that they may worsen POTS symptoms. 

Note: You may read the full text of this article free HERE.

Effects of norepinephrine reuptake inhibition on postural tachycardia syndrome.

By Elizabeth A. Green, et al.

Abstract:

BACKGROUND:
Postural tachycardia syndrome (POTS) is a disorder of chronic orthostatic intolerance accompanied by excessive orthostatic tachycardia. Patients with POTS commonly have comorbid conditions such as attention deficit hyperactivity disorder, depression, or fibromyalgia that are treated with medications that inhibit the norepinephrine reuptake transporter (NRI). NRI medications can increase sympathetic nervous system tone, which may increase heart rate (HR) and worsen symptoms in POTS patients. We sought to determine whether NRI with atomoxetine increases standing tachycardia or worsens the symptom burden in POTS patients.

METHODS AND RESULTS:
Patients with POTS (n=27) underwent an acute drug trial of atomoxetine 40 mg and placebo on separate mornings in a randomized, crossover design. Blood pressure (BP), HR, and symptoms were assessed while seated and after standing prior to and hourly for 4 hours following study drug administration.

  • Atomoxetine significantly increased standing HR compared with placebo (121±17 beats per minute versus 105±15 beats per minute; P=0.001) in POTS patients, with a trend toward higher standing systolic BP (P=0.072).

  • Symptom scores worsened with atomoxetine compared to placebo (+4.2 au versus -3.5 au; P=0.028) from baseline to 2 hours after study drug administration.

CONCLUSION: Norepinephrine reuptake inhibition with atomoxetine acutely increased standing HR and symptom burden in patients with POTS.

Source: Journal of the American Heart Association, September 3, 2013. By Elizabeth A. Green, Beng; Vidya Raj, MB, ChB; Cyndya A. Shibao, MD, MSCI; Italo Biaggioni, MD; Bonnie K. Black, RN, CNP; William D. Dupont, PhD; David Robertson, MD; Satish R. Raj, MD, MSC. Autonomic Dysfunction Center, Division of Clinical Pharmacology, Department of Medicine, Vanderbilt University, Nashville, TN.


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DISCUSS THIS ARTICLE   (1 existing comment) Post a Comment 


Serotonin Norepinephrine reuptake inhibitors (SNRI's)
Posted by: cmesmile
Sep 24, 2013
I am just curious if SNRI's would also have the same effect on POTS symptoms? I am on Effexor XR and have been diagnosed with POTS and CFIDS. I have not noticed any major issues, but have not been on it that long. Does anyone have info on SNRI's?
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