At a glance
What travellers should know
- Can affect anyone regardless of fitness level
- Ascending gradually is the single most effective prevention
- Symptoms usually start within the first 24 hours at altitude
Prevention
Ascend gradually where your itinerary allows, stay well hydrated, avoid alcohol in the first day or two at altitude, and consider discussing preventive medicine options with your pharmacist for higher or faster ascents.
If you feel seriously unwell
- Severe headache, confusion, breathlessness at rest, or difficulty walking in a straight line — these can indicate a more serious form of altitude illness and need urgent medical attention
Common questions
Altitude Sickness FAQs
Preventive medicine can be considered for some higher or faster ascents, alongside gradual acclimatisation. This is assessed individually based on your itinerary and medical history.