Effect of Acetazolamide on Subclinical High-Altitude Pulmonary Edema Detected by Lung Ultrasonography

Inclusion Criteria: 1. At least 18 years of age 2. Able to consent 3. English speaking 4. Trekking directly to Everest Base Camp Exclusion Criteria: 1. Age less than 18 years 2. Non-English speaking 3. Pregnant 4. Already had a diagnosis of acute mountain sickness, high-altitude cerebral edema, or high-altitude pulmonary edema 5. Been on a high-altitude trek 2 weeks prior to this study 6. Has taken acetazolamide 1 week prior to start of trek 7. Has a sulfa allergy 8. Has any type of acute or chronic pulmonary conditions