The Effect of Octanoic Acid on Essential Voice Tremor

A Double-Blind, Placebo-Controlled Study

Soren Lowell, Richard T. Kelley, Marika Monahan, Carly Jo Hosbach-Cannon, Raymond H. Colton, Dragos Mihaila

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Objectives/Hypothesis: The purpose of this study was to determine the effects of octanoic acid on acoustic, perceptual, and functional aspects of essential voice tremor (EVT). Study Design: Prospective, double-blind, placebo-controlled, crossover study. Methods: Sixteen participants with a diagnosis of EVT were randomized to a 3-week dosing condition of octanoic acid or placebo, followed by a 2-week washout period and crossover to the other condition for an additional 3 weeks. Baseline and post-testing sessions were completed before and at the completion of each condition. Primary outcome measures were the magnitude of amplitude and frequency tremor, measured from the acoustic signal. Secondary outcomes were auditory-perceptual ratings of tremor severity and self-ratings of voice handicap. Results: Magnitude of amplitude and frequency tremor were significantly lower after 3 weeks of octanoic acid dosing as compared to the placebo condition. Auditory-perceptual ratings of tremor severity did not show significant differences between conditions. A trend toward better voice was seen for the sustained vowel ratings, but not the sentence-level ratings. No significant differences between conditions were seen on self-reported voice disability as assessed on the Voice Handicap Index-10. Conclusions: The results of this controlled investigation support the potential utility of octanoic acid for reducing the magnitude of tremor in people with EVT. Further research is needed to determine whether different dosing or treatment combinations can improve functional communication in EVT. Level of Evidence: 1 Laryngoscope, 2018.

Original languageEnglish (US)
JournalLaryngoscope
DOIs
StateAccepted/In press - Jan 1 2018

Fingerprint

Essential Tremor
Placebos
Tremor
Acoustics
Laryngoscopes
octanoic acid
Cross-Over Studies
Outcome Assessment (Health Care)
Prospective Studies

Keywords

  • cross-over
  • essential tremor
  • octanoic acid
  • placebo-controlled
  • randomized
  • Tremor
  • voice

ASJC Scopus subject areas

  • Otorhinolaryngology

Cite this

Lowell, S., Kelley, R. T., Monahan, M., Hosbach-Cannon, C. J., Colton, R. H., & Mihaila, D. (Accepted/In press). The Effect of Octanoic Acid on Essential Voice Tremor: A Double-Blind, Placebo-Controlled Study. Laryngoscope. https://doi.org/10.1002/lary.27695

The Effect of Octanoic Acid on Essential Voice Tremor : A Double-Blind, Placebo-Controlled Study. / Lowell, Soren; Kelley, Richard T.; Monahan, Marika; Hosbach-Cannon, Carly Jo; Colton, Raymond H.; Mihaila, Dragos.

In: Laryngoscope, 01.01.2018.

Research output: Contribution to journalArticle

Lowell, Soren ; Kelley, Richard T. ; Monahan, Marika ; Hosbach-Cannon, Carly Jo ; Colton, Raymond H. ; Mihaila, Dragos. / The Effect of Octanoic Acid on Essential Voice Tremor : A Double-Blind, Placebo-Controlled Study. In: Laryngoscope. 2018.
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