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Est. London

Altitude Sickness Consultation London

Risk assessment and prevention advice for Kilimanjaro, Everest Base Camp, Cusco, and any destination above 2,500m. Assessed and, where appropriate, treated in one 15-minute visit. No GP referral needed.

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Trekker on a snow-covered high-altitude mountain ridge — altitude sickness risk assessment and travel health advice at Holborn Clinic, London
GPhC Registered Pharmacy
Yellow Fever Centre
Same Day Appointments
No Consultation Fees
10,000+ Patients Served

Same-day consultation

Pharmacist assessment and, where appropriate, treatment arranged in one 15-minute appointment.

Holborn Clinic pharmacy interior

No GP referral needed

Our pharmacist prescribes directly — no wait, no extra appointments.

Pharmacist consulting with a patient

Free consultation

Your risk assessment is free. Treatment cost confirmed at your appointment — no hidden fees.

Traveller planning a high-altitude trip

Start 1–2 days before

Short lead time — come the day before your flight if needed.

Traveller preparing for a flight with luggage
What Is Altitude Sickness

Anyone Can Be Affected — Even Fit Travellers

Altitude sickness is caused by reduced oxygen levels at high altitude. Fitness, age, and previous experience do not protect you.

Introduction

Altitude sickness — formally known as Acute Mountain Sickness (AMS) — occurs when you ascend too quickly for your body to adapt to lower oxygen levels. It typically develops above 2,500m, though some people are affected at lower altitudes.

Symptoms

Symptoms usually begin within a few hours of reaching altitude: headache, nausea, fatigue, dizziness, and difficulty sleeping. In most cases, mild AMS resolves with rest and no further ascent.

Serious Progression

In some cases it can progress to more serious conditions — High Altitude Pulmonary Oedema (HAPE) or High Altitude Cerebral Oedema (HACE) — which are life-threatening without immediate descent.

Prevention & Medication

A preventive medication option can reduce the risk by stimulating faster breathing, which increases blood oxygen levels and speeds up acclimatisation. It is recommended by the British Mountaineering Council and travel health guidelines for travellers who cannot acclimatise gradually. Our pharmacist assesses whether it is suitable for you.

Altitude Sickness — Know the Stages

Mild (AMS)

Headache, nausea, fatigue, dizziness, poor sleep

Rest, hydrate, do not ascend

Moderate

Severe headache, vomiting, significant fatigue, difficulty walking

Descend immediately, seek medical help

Severe (HAPE/HACE)

Breathlessness at rest, confusion, loss of coordination, coughing blood-tinged sputum

Emergency descent, oxygen, evacuation

High Altitude Destinations

Planning One of These Trips?

Altitude sickness prevention is recommended for all of these destinations. Book your consultation before you fly.

Kilimanjaro — high-altitude travel destination
Tanzania

Kilimanjaro

5,895m

Everest Base Camp — high-altitude travel destination
Nepal

Everest Base Camp

5,364m

Cusco / Machu Picchu — high-altitude travel destination
Peru

Cusco / Machu Picchu

3,400m

La Paz — high-altitude travel destination
Bolivia

La Paz

3,640m

Annapurna Circuit — high-altitude travel destination
Nepal

Annapurna Circuit

5,416m

Lhasa — high-altitude travel destination
Tibet

Lhasa

3,650m

Inca Trail — high-altitude travel destination
Peru

Inca Trail

4,215m

Mount Kenya — high-altitude travel destination
Kenya

Mount Kenya

5,199m

Your Appointment

In and Out in 15 Minutes

Tell us your itinerary — step in your pharmacy visit

Tell us your itinerary

Share your destination, planned altitudes, and trip dates — the more detail the better.

Pharmacist assessment — step in your pharmacy visit

Pharmacist assessment

Our pharmacist checks your health history for contraindications, confirms the correct dose, and explains the dosing schedule.

Prescription issued — step in your pharmacy visit

Prescription issued

If a preventive treatment is clinically appropriate, the prescription is written on the spot — no GP referral required.

Treatment arranged today — step in your pharmacy visit

Treatment arranged today

You leave with any prescribed treatment, full dosing instructions, and advice on recognising altitude sickness symptoms during your trip.

Important

Medication Helps — But These Habits Matter Too

Any preventive treatment works best alongside sensible acclimatisation practice. Our pharmacist covers all of this at your appointment.

Ascend gradually

Above 3,000m, aim to gain no more than 300–500m of sleeping altitude per day. Build in a rest day every 3 days of ascent.

Hydrate consistently

Drink 3–4 litres of water per day at altitude. Dehydration amplifies headaches and fatigue — the earliest AMS symptoms.

Avoid alcohol for 48 hours after arrival

Alcohol impairs your body's acclimatisation response and worsens dehydration. Wait until your body has adjusted before drinking.

Descend at any sign of worsening

If symptoms don't improve with rest, or worsen at all, descend immediately. Even 300–500m can produce rapid relief. Never ascend with symptoms.

Pricing

Altitude Sickness Consultation

Free travel consultation. The exact cost of any treatment is confirmed during your appointment — no hidden fees.

Mon–Fri 09:00–19:00 · Sat 09:00–17:00 · 60 Lamb's Conduit Street, WC1N 3LW

FAQ

Frequently Asked Questions

Ask Questions

The primary approach is gradual acclimatisation — ascending no more than 300–500m of sleeping altitude per day above 3,000m. Where your itinerary does not allow this (for example, flying directly into a high-altitude city), a preventive medication option may be clinically appropriate. Our pharmacist assesses whether this is suitable for you at your consultation.

Book Your Altitude Sickness Consultation

Assessed and, where appropriate, treated in one visit. Call 0207 405 1039 or book online — no GP needed.