Altitude sickness prevention guide
Preventive travel-medicine prescriptions before an ascent — most commonly acetazolamide — for healthy adults after emergency, cardiopulmonary, prior-HACE, and pregnancy screens are negative. This lane does not treat anyone who is already ill at altitude.
在线开始
Acute mountain sickness is common when travelers sleep above about 8,000 ft (2,500 m) or ascend rapidly. Preventive medicine started before the trip lowers the risk, but it never replaces gradual ascent, hydration, and descending if you feel unwell. Care is for planning ahead — if you are already at altitude and ill, that is an emergency, not a prevention visit.
如果治疗合适，医生可以将非管制药物处方发送到您的药房，并通过门户网站向您提供说明。
快速信息
常见症状
可能适合在线护理
请寻求其他类型的护理
需要准备什么
接下来会发生什么
在网站上开始提交请求，回答快速审核的问题，并选择您偏好的响应时间。如果该病例仍然适合，医生会进行审核，并在您访问门户网站后向您发送一份安全的更新。在适当的情况下，非管制药物处方可以发送到您的药房，并可由医生酌情附上一份用于工作或学校的基本证明。
Acetazolamide 125 mg twice daily starting 24 hours before ascent is the standard first-line prevention (250 mg twice daily at physician discretion for an unavoidable rapid ascent). If you have a serious sulfa allergy or cannot take acetazolamide, dexamethasone 4 mg every 12 hours is the sulfa-free alternative. Each is a single, bounded course with no refills.
Not through this lane. These blood-pressure-lowering medicines need in-person evaluation, so a traveler with a prior HAPE diagnosis should arrange an in-person pre-travel or altitude-medicine assessment for HAPE-specific prophylaxis.
That is active altitude illness, not prevention. Descend and get local emergency care. Confusion, trouble walking, breathlessness at rest, cough with pink or frothy sputum, blue lips, worst-ever headache, fainting, chest pain, stroke signs, or new vision loss at altitude are emergencies — descend immediately and call local emergency services (911 in the US).
No. Prevention medicine lowers but does not eliminate risk, and dexamethasone in particular masks symptoms without helping you acclimatize. Ascend gradually, stay hydrated, avoid alcohol and sleeping pills, and do not climb higher on any day you feel unwell.
No. Significant heart or lung disease, home oxygen, severe COPD, pulmonary hypertension, or sickle cell disease/trait needs an in-person pre-travel assessment rather than an online prophylaxis prescription.