Isopropyl Alcohol -Antiemetic Aromatherapy

Review/excerpt of this study from NEJM Journal Watch: by Daniel J. Pallin, MD, MPH.

In the current trial, 120 adult ED patients with nausea or vomiting who did not require intravenous access were randomized to inhaled isopropyl alcohol plus 4 mg oral ondansetron; inhaled isopropyl alcohol plus oral placebo; or inhaled saline plus 4 mg oral ondansetron. Isopropyl alcohol was provided in the form of a standard alcohol swab. Patients received a single dose of the oral intervention but could sniff alcohol or saline swabs repeatedly. Nausea was measured on a 100-mm visual analog scale at baseline and 30 minutes.

Mean nausea scores decreased by 30 mm in the alcohol/ondansetron group, 32 mm in the alcohol/placebo group, and 9 mm in the saline/ondansetron group. Rescue antiemetic therapy was given to 28%, 25%, and 45% of each group, respectively. Differences between alcohol and saline groups were statistically significant. Patients in the inhaled alcohol groups also had better nausea control at the time of discharge and reported higher satisfaction with nausea treatment. No adverse events occurred. The mechanism of action is currently unknown.

Dr. Pallin’s comments on study:

It is uncommon for us to assign a rating of “Practice Changing” to a small, single-center study, but these results are truly remarkable and are consistent with prior research. For patients not obviously requiring IV therapy, we should treat nausea with repeated inhalations from an isopropyl alcohol swab instead of administering any other drug. And, although this study provides no direct evidence of benefit to patients who do require IV therapy, there would seem to be little downside to trying this simple and safe intervention in that group, too.

My take: Who is doing the pediatric study to try to replicate these results in the pediatric population?

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