At Brixton Travel Clinic, we are here to help you prepare for high-altitude adventures, whether you are trekking in Nepal, skiing in the Alps, or exploring the Andes. Altitude sickness, also known as acute mountain sickness (AMS), can affect anyone ascending to high altitudes too quickly, regardless of age or fitness level. Natural remedies are often discussed as an option, but their effectiveness is generally limited compared with over-the-counter (OTC) and prescription altitude sickness medication.
In this guide, we explore how natural remedies, OTC solutions and prescription options compare, and when each is likely to help. If you would like tailored advice ahead of a high-altitude trip, book an appointment with our clinicians, or get in touch with the team at our Brixton clinic.
Not Sure Which Vaccines You Need for Your Trip?
Before we go through altitude sickness in detail, it is worth checking which vaccinations and precautions apply to your specific destination, as many high-altitude regions also carry other travel health risks. Our travel vaccine tool below gives you a starting point, though we would always recommend a consultation for personalised advice, as this guide cannot replace a face-to-face review of your health history and itinerary.
Understanding Altitude Sickness
Altitude sickness occurs when your body struggles to adapt to lower oxygen levels at high altitudes, usually above 2,500 metres. It is one of the most common problems affecting travellers to mountain regions, and it can develop within hours of arriving at altitude. Common symptoms include:
- Headache, often the first and most noticeable symptom
- Nausea or loss of appetite
- Dizziness or light-headedness
- Fatigue and general malaise
- Difficulty sleeping
- Shortness of breath on exertion
If left unmanaged, altitude sickness can progress to serious and potentially life-threatening conditions, including high-altitude pulmonary oedema (HAPE), where fluid builds up in the lungs, or high-altitude cerebral oedema (HACE), where fluid builds up around the brain. Both are medical emergencies and require immediate descent and treatment.
Preventing altitude sickness involves proper acclimatisation, staying hydrated, and sometimes using medication. Let us look at natural options first, then see how they compare with medical treatments.
Who Is Most at Risk?
Altitude sickness can affect anyone, including experienced hikers and those who have never had problems before, but certain factors increase the risk. It is worth discussing your itinerary with a clinician if any of the following apply to you:
- Ascending quickly, particularly gaining more than 500 metres of sleeping altitude per day above 2,500 metres
- A previous history of altitude sickness
- Travelling to altitudes above 3,500 metres, such as parts of the Everest region, the Andes or the Himalayas
- Strenuous exercise soon after arrival, before the body has had time to acclimatise
- Underlying heart or lung conditions
- Flying directly into a high-altitude city, such as La Paz or Lhasa, without a gradual ascent
Fitness level does not offer protection. Some very fit travellers develop significant symptoms, while others cope well at altitude, so it is sensible to plan for the possibility regardless of how well prepared you feel.
Recognising the Warning Signs
Mild altitude sickness can be uncomfortable but is not usually dangerous if you stop ascending and allow your body time to adjust. However, certain symptoms suggest the condition is worsening and require prompt action, ideally descent to a lower altitude and medical assessment:
- Severe or worsening headache that does not respond to pain relief
- Persistent vomiting
- Increasing shortness of breath, even at rest
- A dry cough or coughing up pink or frothy fluid, which can suggest HAPE
- Confusion, poor coordination or difficulty walking in a straight line, which can suggest HACE
- Reduced consciousness or extreme drowsiness
A simple rule used by many trekking guides is that if in doubt, do not go up. Any of the warning signs above mean you should stop ascending, and ideally descend, rather than pushing on and hoping symptoms settle.
Popular Natural Remedies for Altitude Sickness
Several natural remedies are often suggested for preventing or managing altitude sickness. While these may provide some comfort, their effectiveness is generally inconsistent and none of them treat the underlying reduction in oxygen availability.
1. Ginkgo Biloba
Ginkgo biloba is believed to improve circulation and oxygen delivery, potentially easing altitude sickness symptoms. Some studies have shown modest benefits, but others found no significant effect. Ginkgo may offer limited support but should not replace proven medical options, and it can interact with blood-thinning medication, so check with a clinician before use.
2. Ginger
Ginger is a well-known natural remedy for nausea and may provide relief for altitude sickness-related queasiness. However, it does not address the root cause of altitude sickness, which is reduced oxygen levels, so it is best thought of as a comfort measure rather than a treatment.
3. Hydration and Diet
Staying hydrated and eating carbohydrate-rich meals can help your body adjust to high altitudes. These practices support acclimatisation and are genuinely useful, but they are not a substitute for medication if symptoms worsen or if you are travelling to particularly high or remote areas.
Over-the-Counter Altitude Sickness Medication
For mild to moderate altitude sickness, OTC medications can be an effective and accessible way of managing symptoms as they arise.
1. Pain Relievers
Ibuprofen or paracetamol can help alleviate the headache commonly caused by altitude sickness. These medications target specific symptoms but do not prevent or treat the underlying condition.
2. Antiemetics
Over-the-counter anti-nausea medications, such as those containing meclozine or cinnarizine, can relieve nausea and dizziness. These can be useful for travellers who experience mild symptoms, but they are not effective as a preventative measure against altitude sickness itself.
3. Caffeine-Based Remedies
Caffeine can provide a temporary energy boost and may help with mild fatigue. However, it is important to use it in moderation, as excessive caffeine can contribute to dehydration, potentially worsening symptoms rather than helping them.
OTC options are best suited to managing individual symptoms as they arise but are less effective for preventing altitude sickness entirely, particularly on rapid or high ascents.
Natural, OTC and Prescription Options Compared
| Approach | Examples | What It Does | Best Used For |
|---|---|---|---|
| Natural remedies | Ginger, hydration, carbohydrate-rich diet, ginkgo biloba, coca tea | Eases mild discomfort and supports general acclimatisation | Comfort alongside proper acclimatisation, not as a stand-alone solution |
| OTC medication | Paracetamol, ibuprofen, antiemetics, caffeine | Targets individual symptoms such as headache or nausea | Mild symptoms once you are already at altitude |
| Prescription medication | Acetazolamide (Diamox), dexamethasone, nifedipine | Helps the body acclimatise faster or treats severe complications | Rapid or high ascents, previous altitude sickness, or severe symptoms such as HAPE or HACE |
When to Consider Prescription Medication
For travellers venturing to extreme altitudes or ascending rapidly, prescription altitude sickness medication such as acetazolamide (Diamox) can be highly effective. Acetazolamide helps your body acclimatise faster by encouraging deeper breathing, which reduces the risk of developing severe symptoms. It is often considered for treks where a gradual ascent is not possible, or for travellers with a history of altitude sickness.
In cases of severe altitude sickness or complications such as HAPE or HACE, other prescription medications, including dexamethasone or nifedipine, may be required. These medications can be lifesaving but should only be used under medical supervision, with clear guidance on when to start them and what to do if symptoms do not improve. At Brixton Travel Clinic, we can help you understand your needs and access the right medication for your trip.
We can also support you when it comes to creating the perfect travel first aid kit for your journey, or administering the right vaccines for your destination, particularly where high-altitude regions also carry other travel health risks.
Combining Remedies for Best Results
The best approach to managing altitude sickness often involves a combination of strategies rather than relying on any single option. A practical, staged approach looks like this:
- Start with prevention. Gradual acclimatisation is key. Where possible, plan your ascent to allow your body time to adjust, building in rest days every few days once above 2,500 to 3,000 metres.
- Use OTC solutions for mild symptoms. Carry pain relievers and anti-nausea medication so you are prepared to manage mild symptoms without needing to interrupt your trip.
- Incorporate natural practices. Stay hydrated, eat well, and consider remedies such as ginger for nausea, alongside proper rest.
- Add prescription medication if needed. For high-risk trips, consult a healthcare provider about acetazolamide or other prescription options well before you travel.
- Know your escape plan. Understand how you would descend quickly if symptoms became severe, and make sure your travel insurance covers evacuation from altitude if relevant.
This balanced approach allows you to manage symptoms effectively while reducing the risk of severe complications, and it means you are not relying on a single strategy if your first line of defence is not enough.
Practical Prevention Tips
Alongside medication, some simple habits make a real difference to how well your body copes at altitude:
- Ascend gradually and avoid flying or driving straight to a very high altitude where possible
- Build in rest days to allow acclimatisation, particularly above 3,000 metres
- Avoid alcohol and sedative medication in the first few days at altitude, as these can mask symptoms and worsen breathing
- Sleep at a lower altitude than the highest point you reach during the day, where your itinerary allows
- Keep well hydrated, but avoid excessive fluid intake, which can also cause problems
- Tell your travel companions about the symptoms of altitude sickness so they can look out for you and vice versa
Why Preparation Matters
Altitude sickness can affect anyone, regardless of fitness level or previous travel experience. While natural remedies and OTC medications can help manage symptoms, they are not always enough to prevent or treat altitude sickness on their own. Ensuring you are well prepared with a combination of strategies, including the possibility of prescription medication, can make the difference between an enjoyable trip and a health emergency.
Frequently Asked Questions
What altitude does altitude sickness usually start at?
Symptoms can begin above around 2,500 metres, though some people notice mild effects at slightly lower altitudes. Risk increases the higher and faster you ascend.
Can natural remedies alone prevent altitude sickness?
Natural remedies such as hydration, a good diet and ginger may ease mild discomfort, but they do not address the underlying reduction in oxygen and should not be relied upon as your only strategy on a high-altitude trip.
Is acetazolamide (Diamox) safe to take?
Acetazolamide is widely used and generally well tolerated, but it is a prescription medication and is not suitable for everyone, including some people with sulfa allergies or certain kidney conditions. A consultation is needed to check it is appropriate for you.
How quickly should I descend if I develop severe symptoms?
If you develop warning signs such as confusion, breathlessness at rest or persistent vomiting, you should descend as soon as possible and seek medical help. Severe altitude sickness can worsen quickly, so early action matters.
Can children or older travellers get altitude sickness?
Yes. Altitude sickness can affect travellers of any age. Children may find it harder to describe their symptoms clearly, so parents should watch closely for signs such as irritability, poor appetite or unusual tiredness.
Do I need a prescription before I travel, or can I get one abroad?
We would always recommend arranging any prescription altitude sickness medication before you travel, as access to appropriate medication and clinical advice can be limited once you are at altitude or in a remote area.
How Brixton Travel Clinic Can Help
At Brixton Travel Clinic, we specialise in preparing travellers for high-altitude adventures. Our team can provide personalised advice based on your destination, itinerary and medical history, and we stock a range of OTC medications alongside the ability to discuss whether prescription altitude sickness medication is appropriate for your trip.
This guide is intended as general background information and is no substitute for a personal assessment. Our clinicians in Brixton, London, can review your itinerary in detail, discuss which combination of natural, OTC and prescription options suits you, and answer any questions face to face. You can arrange an appointment online, or contact our team directly on 02077334075 if you would prefer to discuss your travel plans first. You are also welcome to use the form below to book directly with us.
