Opioid-Induced Nausea Involves a Vestibular Problem Preventable by Head-Rest

Nadine Lehnen, Fabian Heuser, Murat Sağlam, Christian M Schulz, Klaus J Wagner, Masakatsu Taki, Eberhard F Kochs, Klaus Jahn, Thomas Brandt, Stefan Glasauer and Erich Schneider

PLOS ONE, 2015, vol. 10, issue 8, 1-14

Abstract: Background and Aims: Opioids are indispensable for pain treatment but may cause serious nausea and vomiting. The mechanism leading to these complications is not clear. We investigated whether an opioid effect on the vestibular system resulting in corrupt head motion sensation is causative and, consequently, whether head-rest prevents nausea. Methods: Thirty-six healthy men (26.6±4.3 years) received an opioid remifentanil infusion (45 min, 0.15 μg/kg/min). Outcome measures were the vestibulo-ocular reflex (VOR) gain determined by video-head-impulse-testing, and nausea. The first experiment (n = 10) assessed outcome measures at rest and after a series of five 1-Hz forward and backward head-trunk movements during one-time remifentanil administration. The second experiment (n = 10) determined outcome measures on two days in a controlled crossover design: (1) without movement and (2) with a series of five 1-Hz forward and backward head-trunk bends 30 min after remifentanil start. Nausea was psychophysically quantified (scale from 0 to 10). The third controlled crossover experiment (n = 16) assessed nausea (1) without movement and (2) with head movement; isolated head movements consisting of the three axes of rotation (pitch, roll, yaw) were imposed 20 times at a frequency of 1 Hz in a random, unpredictable order of each of the three axes. All movements were applied manually, passively with amplitudes of about ± 45 degrees. Results: The VOR gain decreased during remifentanil administration (p

Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0135263

DOI: 10.1371/journal.pone.0135263

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