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What are Acetazolamide 250mg tablets?

Acetazolamide 250mg tablets have a few different uses but they are often used as altitude sickness tablets. These acetazolamide tablets are the generic version of the branded medication called Diamox.

Acetazolamide uses also include treating glaucoma, fluid retention and epilepsy.

Take as prescribed
Do not store above 25°C
Do not use after expiry date

How does Acetazolamide work?

These altitude sickness pills contain the active ingredient acetazolamide. Acetazolamide is in a group of medicines called carbonic anhydrase inhibitors.

This medicine can become less effective over time, so it’s generally only prescribed for a short period of time.

How do you take Acetazolamide?

Always use Acetazolamide altitude sickness medicine as directed by your doctor or pharmacist.  

The acetazolamide dose is as follows: one tablet should be taken twice a day, beginning two days before travelling. Continue taking Acetazolamide until two days after you have reached the highest altitude you are going to be travelling to.

Swallow the tablets whole with water. You can take this medication with or without food.

How effective are Acetazolamide?

Acetazolamide is a clinically proven altitude sickness medication.

To help prevent altitude sickness there are a few other steps you can take. You should avoid flying directly to an area of high altitude, and ideally if you are climbing you would take regular rest days and not climb more than 500m in a day.

Make sure to drink plenty of water and avoid smoking and drinking alcohol whilst you acclimatise to the higher altitude.

What are the main side effects of Acetazolamide?

Like all medicines, Acetazolamide altitude tablets can cause side effects, although not everyone will experience them. Acetazolamide for altitude sickness has some common side effects, including:

  1. Heachache
  2. Diarrhoea
  3. Nausea or vomiting

For a full list of Acetazolamide side effects, please see the patient information leaflet.

Frequently Asked Questions

What is Diamox?

Diamox is the branded version of Acetazolamide altitude sickness tablets.

What is Acetazolamide used for?

Acetazolamide is used to control altitude sickness. It can also treat glaucoma, epilepsy and fluid retention.

* Disclaimer: Results and individual responses to treatments may vary from person to person. If you do need medical advice you should always speak to a doctor, pharmacist or appropriate medical professional.