Efficacy of Prophylactic Treatment of Oral Prochlorperazine for Acute Mountain Sickness

NCT ID: NCT06310642

Last Updated: 2024-05-28

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE4

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2021-05-20

Study Completion Date

2023-03-13

Brief Summary

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A field-based trial was conducted to determine if oral prochlorperazine demonstrates efficacy in the prophylactic treatment of AMS, and/or decreases the incidence of the symptoms of acute mountain sickness including headache, GI symptoms, fatigue and dizziness based on data collected in the Lake Louise AMS score.

Detailed Description

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This was a prospective, single-blinded, field-based interventional trial involving consenting, healthy subjects aged \>17 years. The study was conducted on the big Island of Hawaii, at sea level and at the summit of Mauna Kea volcano. Following randomization, subjects received either placebo or 10mg prochlorperazine, then immediately drove for 2 hours from sea level to the volcano summit (4205m). Participants spent 240 min at the summit, and they recorded their symptoms. AMS was defined by the previously validated Lake Louise Acute Mountain Sickness Score (LLAMS). Categorical variables were analyzed by chi-square; continuous variables analyzed by t-tests.

Conditions

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AMS Acute Mountain Sickness

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Enrolled a cohort of consenting, healthy subjects aged \>17 years. Thirty subjects enrolled in the study. 15 subjects received prochlorperazine. 15 subjects received placebo.
Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Participants
Patients were blinded in this study.

Study Groups

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Prochlorperazine 10 mg

Subjects received 10 mg Prochlorperazine one time.

Group Type EXPERIMENTAL

Immediate descent from altitude.

Intervention Type OTHER

Immediate descent from altitude for severe symptoms or anyone who wished to discontinue their participation in the study.

Diphenhydramine

Intervention Type DRUG

Diphenhydramine was available to counteract any potential extrapyramidal side effects of the study drug. The use of Diphenhydramine for this purpose is well established.

Prochlorperazine 10 mg

Intervention Type DRUG

Subjects in the Prochlorperazine arm were administered 10mg PO Prochlorperazine immediately prior to ascent

Placebo

Subjects received Placebo one time.

Group Type PLACEBO_COMPARATOR

Immediate descent from altitude.

Intervention Type OTHER

Immediate descent from altitude for severe symptoms or anyone who wished to discontinue their participation in the study.

Diphenhydramine

Intervention Type DRUG

Diphenhydramine was available to counteract any potential extrapyramidal side effects of the study drug. The use of Diphenhydramine for this purpose is well established.

Interventions

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Immediate descent from altitude.

Immediate descent from altitude for severe symptoms or anyone who wished to discontinue their participation in the study.

Intervention Type OTHER

Diphenhydramine

Diphenhydramine was available to counteract any potential extrapyramidal side effects of the study drug. The use of Diphenhydramine for this purpose is well established.

Intervention Type DRUG

Prochlorperazine 10 mg

Subjects in the Prochlorperazine arm were administered 10mg PO Prochlorperazine immediately prior to ascent

Intervention Type DRUG

Other Intervention Names

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Benadryl

Eligibility Criteria

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Exclusion Criteria

* Known allergy or contraindication to the study drug.
* Known or suspected pregnancy.
* Use of another analgesic or antiemetic within 8 hours of enrollment.
* History of chronic headaches.
* Inability to provide informed consent.
* Use of central nervous system depressants, including alcohol, opiates, and/or barbiturates, within 24 hours of the study start time.
* History of severe depression.
* History of dementia.
* Prior ascent and stay at 2500m for duration over 6 weeks within 30 days prior.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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CHRISTUS Health

OTHER

Sponsor Role lead

Responsible Party

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Peter Richman, MD

Professor and Research Director, Department of Emergency Medicine

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Peter Richman, MD

Role: PRINCIPAL_INVESTIGATOR

CHRISTUS Health

Locations

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CHRISTUS Health-Texas A&M Spohn Emergency Medicine Residency

Corpus Christi, Texas, United States

Site Status

Countries

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United States

References

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Smedley T, Grocott MP. Acute high-altitude illness: a clinically orientated review. Br J Pain. 2013 May;7(2):85-94. doi: 10.1177/2049463713489539.

Reference Type BACKGROUND
PMID: 26516505 (View on PubMed)

Klocke DL, Decker WW, Stepanek J. Altitude-related illnesses. Mayo Clin Proc. 1998 Oct;73(10):988-92; quiz 992-3. doi: 10.4065/73.10.988.

Reference Type BACKGROUND
PMID: 9787751 (View on PubMed)

Irons HR, Salas RN, Bhai SF, Gregorie WD, Harris NS. Prospective Double-Blinded Randomized Field-Based Clinical Trial of Metoclopramide and Ibuprofen for the Treatment of High Altitude Headache and Acute Mountain Sickness. Wilderness Environ Med. 2020 Mar;31(1):38-43. doi: 10.1016/j.wem.2019.11.005. Epub 2020 Feb 11.

Reference Type BACKGROUND
PMID: 32057631 (View on PubMed)

Luks AM, Auerbach PS, Freer L, Grissom CK, Keyes LE, McIntosh SE, Rodway GW, Schoene RB, Zafren K, Hackett PH. Wilderness Medical Society Clinical Practice Guidelines for the Prevention and Treatment of Acute Altitude Illness: 2019 Update. Wilderness Environ Med. 2019 Dec;30(4S):S3-S18. doi: 10.1016/j.wem.2019.04.006. Epub 2019 Jun 24.

Reference Type BACKGROUND
PMID: 31248818 (View on PubMed)

Netzer N, Strohl K, Faulhaber M, Gatterer H, Burtscher M. Hypoxia-related altitude illnesses. J Travel Med. 2013 Jul-Aug;20(4):247-55. doi: 10.1111/jtm.12017. Epub 2013 Mar 11.

Reference Type BACKGROUND
PMID: 23809076 (View on PubMed)

Lu H, Wang R, Xiong J, Xie H, Kayser B, Jia ZP. In search for better pharmacological prophylaxis for acute mountain sickness: looking in other directions. Acta Physiol (Oxf). 2015 May;214(1):51-62. doi: 10.1111/apha.12490. Epub 2015 Mar 28.

Reference Type BACKGROUND
PMID: 25778288 (View on PubMed)

Kanaan NC, Peterson AL, Pun M, Holck PS, Starling J, Basyal B, Freeman TF, Gehner JR, Keyes L, Levin DR, O'Leary CJ, Stuart KE, Thapa GB, Tiwari A, Velgersdyk JL, Zafren K, Basnyat B. Prophylactic Acetaminophen or Ibuprofen Results in Equivalent Acute Mountain Sickness Incidence at High Altitude: A Prospective Randomized Trial. Wilderness Environ Med. 2017 Jun;28(2):72-78. doi: 10.1016/j.wem.2016.12.011. Epub 2017 May 4.

Reference Type BACKGROUND
PMID: 28479001 (View on PubMed)

Olson LG, Hensley MJ, Saunders NA. The effects of combined morphine and prochlorperazine on ventilatory control in humans. Am Rev Respir Dis. 1986 Apr;133(4):558-61. doi: 10.1164/arrd.1986.133.4.558.

Reference Type BACKGROUND
PMID: 3963624 (View on PubMed)

Other Identifiers

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2020-217

Identifier Type: -

Identifier Source: org_study_id

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