
Altitude Sickness Advice in Hampstead
Prepare for the climb before you leave home.
A trek, ski trip or stay in a high-altitude city deserves its own travel health plan. Speak to Hampstead Travel Clinic about your route, sleeping altitudes and previous experience before you set off.
28 Englands Lane, London NW3 4UE · 020 7722 1095
Inside Allchin Pharmacy. Call to confirm service availability and suitability.
Thoughtful preparation for a different kind of journey.
Why altitude needs planning
At higher elevations, reduced air pressure means less oxygen reaches your body with each breath. Going up gradually gives your body time to adapt, a process called acclimatisation. Rapid ascent can outpace that adjustment.
Altitude illness commonly occurs above about 2,500 metres, although some people can be affected lower down. It can happen on arrival in a high city as well as during a mountain climb. Being physically fit does not reliably protect you.
Reduce the risk before your trip
Build gradual ascent and regular rest days into your route.
Plan sleeping heights as carefully as the highest point you intend to reach.
Allow time to acclimatise if you fly or drive directly to altitude.
Check your travel insurance covers the activity, altitude and emergency evacuation.
If you have had altitude illness before, or have an existing health condition, seek advice well before travel. Medicines may be considered for some itineraries, but they do not replace a sensible ascent plan.
Symptoms and what to do
Headache, nausea, poor appetite, dizziness, unusual tiredness and difficulty sleeping can occur after ascent. Tell a companion or guide if you feel unwell. Do not continue higher while you have symptoms.
If symptoms worsen or do not improve after a day at the same height, descend and seek medical advice. Serious altitude illness can progress quickly; a routine appointment back home is not an appropriate response.
Preparing for an assessment in Hampstead
Bring the itinerary from your tour operator, including arrival altitude, each night’s accommodation and any planned summit day. Tell the clinician about previous altitude problems, health conditions, allergies and all medicines you take.
Ask the clinic to confirm its current altitude service, eligibility and charges before booking. Any preventative medicine requires an individual suitability assessment. A consultation cannot guarantee that you will avoid altitude illness or be able to complete a climb.
Altitude sickness questions
Do all mountain trips need preventative medicine?
No. The decision depends on the ascent profile and your individual circumstances. Advice about the route comes before a decision about medicine.
Can a high-altitude city cause problems?
Yes. The speed at which you reach altitude matters, even if you are not trekking. Include city stays and airport transfers in your itinerary.
Can I keep climbing if a headache improves with pain relief?
Do not use symptom relief as permission to ascend. Follow altitude safety advice and your guide or clinician’s instructions.
Let’s talk about your plans.
Contact Hampstead Travel Clinic inside Allchin Pharmacy. Let the team know which service you are interested in so they can advise on the appropriate appointment.
Also preparing for travel? Explore our travel vaccination services and malaria advice.

