Comparison of Temazepam and Acetazolamide to Treat Difficulty Sleeping at High Altitude

Inclusion Criteria: * Trekkers on the Annapurna circuit * Must be in the process of ascent (\> 200 meters over the previous 24 hours) * Must be willing to stay 2 nights in Manang, Nepal * Healthy adults, age 18-65 * Self-report of new difficulty sleeping over the previous two days Exclusion Criteria: * Recent (\< 2 weeks) high altitude exposure (higher than 11, 500 feet or 3500 meters) * Current acute illness * Moderate to Severe Acute Mountain Sickness (Lake Louise AMS score \> 4) * High Altitude Cerebral Edema * High Altitude Pulmonary Edema * Any pre-existing sleep disorders or sleep related condition including obstructive sleep apnea, morbid obesity (BMI \> 40), restless leg syndrome, etc. * Any lung disease or condition affecting the lungs, including chronic obstructive pulmonary disease, asthma, cystic fibrosis, etc. * Congestive heart failure, pulmonary hypertension, or cardiomyopathy * Current oxygen use * Kidney disease * Liver disease * Pregnancy or breast feeding * Seizure disorder or other neurologic disorder * Glaucoma * Sulfa allergy * Acetazolamide allergy * Benzodiazepine allergy * Temazepam allergy * Currently on acetazolamide * Currently taking any benzodiazepines * Current medical treatment with any of the following: antidepressants, neuroleptics, anxiolytics, H1 antihistamines, barbiturates or hypnotics (including benzodiazepines or any other sleep aids). * Major psychiatric diagnosis (depression, anxiety, schizophrenia) * Recreational drug use * Caffei…