Free tool
Will you need altitude sickness tablets?
Heading to Kilimanjaro, Cusco and the Inca Trail, La Paz or Everest Base Camp? Answer a few questions to see your altitude sickness risk and whether a GP may consider acetazolamide. Nothing you enter leaves your device.
Altitude sickness risk checker
Free · about 1 minute · nothing is saved
Danger signs at altitude — go down now
Confusion, drowsiness, stumbling, breathlessness at rest, or a wet cough. Descend with a companion and get local medical help. Do not wait for daylight.
Educational guide only. Any medicine is decided by an Irish-registered GP after reviewing your health and itinerary.
Free guide
Irish traveller's guide to altitude sickness
Symptoms, safe ascent, popular routes and how acetazolamide works.
2,500 m
Risk starts
500 m/night
Max sleep gain
Climb high
Sleep low
Peru · Kili
Everest & more
Based on the Wilderness Medical Society guidelines and UK travel-health guidance from TravelHealthPro (NaTHNaC) and the NHS.