CompletedPhase 4

Ibuprofen vs Acetaminophen for AMS Prevention

Nepal288 participantsStarted 2014-10

Plain-language summary

AMS (acute mountain sickness) affects those who ascend too high (\>2000m) too fast. Acetazolamide is an effective drug for the prevention of AMS where proper acclimatization with gradual ascent may not be an option. AMS presents with headache and other non-specific symptoms such as nausea, tiredness, and dizziness. Because of the side effects of acetazolamide such as a tingling sensation, other drugs have been investigated to see if they will prevent AMS. Ibuprofen has recently been shown to prevent AMS. In this present study the investigators want to see if acetaminophen can also prevent AMS as acetaminophen unlike ibuprofen does not have gastric side effects. Second, because acetaminophen has much less anti-inflammatory component than ibuprofen, it may also provide some insight into the pathophysiology of AMS if acetaminophen were found to be effective in the prevention of AMS.

Who can participate

Age range18 Years – 65 Years

SexALL

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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * Healthy subjects between the ages of 18 and 65, male or female, non-Nepali, without AMS or any concurrent illness, and not already taking NSAIDs and acetazolamide or any other drug for the prevention of altitude illness. Subjects will be enrolled by study administrators en route directly to Everest Base Camp or Kala Patthar between the villages of Pheriche/Dingboche and Lobuche. Exclusion Criteria: * Individuals not meeting inclusion criteria, including mild AMS (more than one mild symptom on the Lake Louise Questionnaire) or significantly depressed oxygen saturation (\<75%); females known to be pregnant, cannot exclude the possibility of being pregnant, or have missed menses by over 7 days; individuals who have spent 24 hours at an altitude of 4500 meters/14,000 feet within the last 9 days; anyone known to have taken any of the following in the last 2 days: acetazolamide (Diamox®), steroids (dexamethasone, prednisone), theophylline, or diuretics (Lasix®); individuals who have a known intracranial space occupying lesion or a history of elevated intracranial pressure, (i.e. tumors, hydrocephalus, etc).

What they're measuring

Diagnosis of Acute Mountain Sickness (AMS)

Timeframe: Upon reaching 5000m altitude (Lobuche) of Nepal Himalaya. Average stay of the trekkers at this altitude is expected about a day or more. The assessment of the participants will be done next day (after spending overnight) upon their arrival.

Trial details

NCT IDNCT02244437

SponsorMountain Medicine Society of Nepal

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2014-12