What it is
Acetazolamide 250mg tablets can help prevent and reduce the symptoms of high-altitude sickness. It's taken from the day before you start ascending until a couple of days after you reach your highest altitude. (This is an off-licence use that our pharmacist will explain.)
Who it's for
Suitable if…
- Adults aged 18 and over.
- Your symptoms match what this treats
- You have no reason below not to use it
Not suitable if…
- you are allergic to sulfonamide medicines
- you have kidney or liver problems
- you are pregnant or breastfeeding
- you have certain eye conditions (glaucoma)
How it works
Tell us about your trip and health online
Our pharmacist reviews your answers
If suitable, we supply your tablets before you travel
Questions, answered plainly
Does it stop altitude sickness completely?
No — the best prevention is a slow, gradual ascent. Acetazolamide reduces the risk and severity, and works best alongside sensible acclimatisation.
When do I start taking it?
Usually the day before you start climbing. Our pharmacist will give you exact timing for your itinerary.
Ready to start?
It only takes a few minutes, and our pharmacist reviews every answer.
Start your free consultation →