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OtherPractice

Inhaled isopropyl alcohol for nausea and vomiting in the emergency department

Adrienne J. Lindblad, Rhonda Ting and Kevin Harris
Canadian Family Physician August 2018, 64 (8) 580;
Adrienne J. Lindblad
Knowledge Translation and Evidence Coordinator for the Alberta College of Family Physicians and Associate Clinical Professor in the Department of Family Medicine at the University of Alberta in Edmonton.
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Rhonda Ting
Doctoral student in the Faculty of Pharmacy and Pharmaceutical Sciences at the University of Alberta.
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Kevin Harris
Assistant Clinical Professor in the Department of Emergency Medicine, at the University of Alberta.
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Clinical question

Can inhaled isopropyl alcohol be used to treat nausea and vomiting in the emergency department (ED)?

Bottom line

Two trials with about 200 nonpregnant adults presenting to the ED found inhaled (smelling) isopropyl alcohol improved mild to moderate nausea and vomiting. For example, after 30 minutes the nausea score improved from 50 out of 100 to 20 with inhaled isopropyl alcohol versus 40 with oral ondansetron. Only 1 study reported adverse events and found none.

Evidence

  • A blinded ED RCT randomized (with matching placebos) 122 nonpregnant adults with mild-moderate nausea and vomiting (most with infectious gastroenteritis) to inhaled isopropyl alcohol, ondansetron, or both.1

    • -At 30 minutes, a statistically significant reduction in nausea score occurred: From a baseline score of about 50 on a 100-point scale, nausea score decreased to 40 with ondansetron versus 20 with inhaled isopropyl alcohol.

    • -Other outcomes included the following: on a 100-point scale (lower score = more satisfied), patient satisfaction scores were about 20 for inhaled isopropyl alcohol versus 44 for ondansetron; fewer rescue antiemetics with inhaled isopropyl alcohol (about 26% vs 45%), but this was not statistically significant; and no difference in ED length of stay or vomiting rates.

    • -There were no adverse effects.

    • -Limitations were possible selection bias; 1 military hospital; and many patients (up to 60%) using inhaled isopropyl alcohol could identify their treatment group.

  • Another blinded ED RCT randomized 84 patients to inhaled isopropyl alcohol or saline-soaked pads (placebo).2 The baseline nausea score was 6 out of 10. At 10 minutes postintervention, median nausea score was lower (3 vs 6 [placebo]; statistically different). Patient satisfaction scores improved (4 vs 2 [placebo] out of 5; higher = more satisfied). There was no difference in number receiving antiemetics or serious adverse effects.

Context

  • Patients inhaled deeply as frequently as required to achieve nausea relief from commercially available isopropyl alcohol pads held 1 to 2 cm below the nares.1

  • A recent systematic review found no evidence to support any 1 pharmacologic treatment over another in the ED for nausea.3

  • Ondansetron costs about $4 per tablet.4

  • A systematic review of 4 RCTs (215 patients)5 of inhaled isopropyl alcohol for postoperative nausea found fewer patients required rescue antiemetics versus standard therapy (26% vs 39% [placebo]): number needed to treat of 8. Other outcomes were inconsistent and adverse effects were not reported.

Implementation

Nausea and vomiting can be difficult to treat in the ED. A recent systematic review found neither intravenous metoclopramide nor ondansetron to be superior to placebo on nausea scores at 30 minutes; however, metoclopramide decreased the need for rescue antiemetics (about 16% vs 38% [placebo]).3 Intravenous fluids and general supportive treatment in the ED might contribute to the large placebo effect,3 which lowers nausea scores by about 23 to 40 points on a 100-point scale, and explains much of the apparent efficacy of medications in practice. Inhaled isopropyl alcohol provides a peak effect within 4 minutes postinhalation,2 and multiple pads can be used for continued short-lasting nausea relief.1

Notes

Tools for Practice articles in Canadian Family Physician are adapted from articles published on the Alberta College of Family Physicians (ACFP) website, summarizing medical evidence with a focus on topical issues and practice-modifying information. The ACFP summaries and the series in Canadian Family Physician are coordinated by Dr G. Michael Allan, and the summaries are co-authored by at least 1 practising family physician and are peer reviewed. Feedback is welcome and can be sent to toolsforpractice@cfpc.ca. Archived articles are available on the ACFP website: www.acfp.ca.

Footnotes

  • Competing interests

    None declared

  • The opinions expressed in Tools for Practice articles are those of the authors and do not necessarily mirror the perspective and policy of the Alberta College of Family Physicians.

  • Copyright© the College of Family Physicians of Canada

References

  1. 1.↵
    1. April MD,
    2. Oliver JJ,
    3. Davis WT,
    4. Ong D,
    5. Simon EM,
    6. Ng PC,
    7. et al
    . Aromatherapy versus oral ondansetron for antiemetic therapy among adult emergency department patients: a randomized controlled trial. Ann Emerg Med. 2018 Feb 17.
  2. 2.↵
    1. Beadle KL,
    2. Helbling AR,
    3. Love SL,
    4. April MD,
    5. Hunter CJ
    . Isopropyl alcohol nasal inhalation for nausea in the emergency department: a randomized controlled trial. Ann Emerg Med 2016;68(1):1-9.e1. Epub 2015 Dec 8.
    OpenUrl
  3. 3.↵
    1. Furyk JS,
    2. Meek RA,
    3. Egerton-Warburton D
    . Drugs for the treatment of nausea and vomiting in adults in the emergency department setting. Cochrane Database Syst Rev 2015;(9):CD010106.
  4. 4.↵
    1. Kolber MR,
    2. Lee J,
    3. Korownyk C,
    4. Allan GM,
    5. Nickonchuk T
    . Price comparison of commonly prescribed pharmaceuticals in Alberta 2018. Edmonton, AB: Alberta College of Family Physicians; 2018.
  5. 5.↵
    1. Hines S,
    2. Steels E,
    3. Chang A,
    4. Gibbons K
    . Aromatherapy for treatment for postoperative nausea and vomiting. Cochrane Database Syst Rev 2018;(3):CD007598.
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Canadian Family Physician: 64 (8)
Canadian Family Physician
Vol. 64, Issue 8
1 Aug 2018
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Inhaled isopropyl alcohol for nausea and vomiting in the emergency department
Adrienne J. Lindblad, Rhonda Ting, Kevin Harris
Canadian Family Physician Aug 2018, 64 (8) 580;

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Adrienne J. Lindblad, Rhonda Ting, Kevin Harris
Canadian Family Physician Aug 2018, 64 (8) 580;
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