Acetazolamide (Diamox)

Acetazolamide 250mg (formerly known as Diamox) for the treatment of altitude sickness available.

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5 stars 11,800 Dr Fox reviews

How to buy online

  1. Read medical information about altitude sickness
  2. Answer medical questions to check for eligibility
  3. Reviewed by doctors - posted from UK pharmacy


Diamox is a brand name for acetazolamide 250mg tablets. The Diamox brand is no longer sold in the UK (April 2015). Dr Fox continues to use the name 'Diamox' for acetazolamide tablets because this is the name people recognise. We supply only UK licensed acetazolamide from a UK pharmacy.


Acetazolamide 250mg (Diamox)28 tablets£20.00
Acetazolamide 250mg (Diamox)56 tablets£39.00
Acetazolamide 250mg (Diamox)112 tablets£76.00

Prescription issued online - small prescription fee per order.

Compare prices: Dr Fox prices are 25%-50% lower cost than other online clinics.

Prescription fees

Dr Fox supplies medicine on prescription and charges a small prescription fee based on the order value of each prescription.

Prescriptions are issued by our doctors online and sent electronically to our pharmacy.

If you have your own private paper prescription please post to our pharmacy (details).

Dr Fox prices are 25%–50% lower than other UK online clinics.

Order valuePrescription fee
up to £10£1.00
up to £20£3.00
up to £50£5.00
up to £100£8.00
over £100£10.00
Comparative costs of Acetazolamide 250mg from UK online clinics (29 January 2018) - qualifying notes
  1. The prices shown are listed by the online clinics named after a customer first enters consultation information and is offered prescriptions. It is possible these clinics may have special offers or lower prices for repeat supplies.
  2. Prices may change and are, to the best of our knowledge, accurate on the date stated. All products in stock and new condition.
  3. Dr Fox does NOT claim to provide a superior service to any of the online clinics listed. All the clinics listed, as far as we can tell, comply with all regulation and, as far as we can tell, operate to high ethical standards.
  4. Dr Fox adds a small prescription fee not included in the table (between £1 and £10 depending on value of the order).
  5. To amend the information in this table please contact us
  6. The prices listed in the table do not identify the cost of prescription medicine as online clinics charge a single fee to cover services which includes advice, consultations, prescriptions and dispensing and supply of treatments.
Acetazolamide 250mgDr FoxHealth ExpressExpress PharmacyIndependent Pharmacy
28 tablets£20.00£49.95£26.99£28.50
UK delivery£2.90included£2.95£2.95

Delivery charges

UK delivery only: £2.90 per consultation via Royal Mail 24 Signed For (1-3 working days with tracking).

Parcel forwarding services are not permitted. Use only UK home or work delivery address.

About Acetazolamide (Diamox)

Diamox was a brand name for acetazolamide 250mg tablets. The Diamox brand is no longer being sold in the UK (April 2015).

Diamox tablets for altitude sickness

Mild altitude sickness is unpleasant and should act as a warning. Headache, fatigue, loss of appetite and poor sleep above 10,000 feet (3,000 metres) are signs of early altitude sickness. Do not ascend further until these symptoms settle.

Diamox helps to settle the symptoms of early altitude sickness more quickly.

Serious altitude sickness where there is a build up of fluid in the brain and/or the lungs is dangerous. Symptoms of extreme shortness of breath and/or disturbed mental function can come on rapidly. Over a period of hours symptoms can progress to coma and even death. At the first sign of these symptoms rapid descent of at least 1,500 feet (500 metres) is the best treatment. Other treatments include oxygen, steroids and Diamox.

If a person can not get their breath when everybody else has regained theirs or if a person is behaving strangely or can not walk in a straight line this is a medical emergency.

Diamox to improve sleep

At altitude (above 3,000 metres) abnormal breathing often disturbs sleep. There can be prolonged pauses between breaths followed by brief periods of rapid breathing. This leads to restless sleep and day time fatigue.

Diamox can be taken to reduce the sleep disturbance of altitude.

Acclimatising to altitude

The symptoms of mountain sickness and the dangers can be reduced by proper acclimatisation. See guidelines acclimatising to altitude.

Taking Diamox reduces the chances of getting mountain sickness, although it does not replace proper acclimatisation. Altitude sickness can and does still occur.

Guide to altitude


2,500 to 4,000 metres

8,000 to 13,000 feet

Very High

4,000 to 5,500 metres

13,000 to 18,000 feet

Extremely High

over 5,500 metres

over 18,000 feet

Side effects of Diamox

Most people taking Diamox do not experience side effects. Diamox side effects include: passing extra urine, flushing, thirst, headache, dizziness, fatigue, irritability, depression, a 'tingling' feeling in the extremities; some loss of appetite, taste disturbance, reduced libido and occasional instances of drowsiness and confusion. For a full list of side effects see the Diamox Patient Information Leaflet.

People allergic to sulpha containing drugs should not take Diamox.

Diamox dose

Dr Fox supplies 250mg Diamox tablets on prescription at a dose of one twice daily for early symptoms of mountain sickness. The dose is the same where forced ascent cannot be avoided. For Diamox dosage details.

The dose of 250mg Diamox tablets for sleep disturbance is half a tablet (125mg Diamox) twice daily.

Diamox online

Diamox is acetazolamide. It is available from online pharmacies. However pharmacies require their customers to provide their own prescriptions. Doctors usually charge £10 to £25.00 for private prescriptions. Most GPs would not be familiar enough with altitude medicine for them to prescribe Diamox.

Specialist travel clinics charge more than Dr Fox to buy Diamox online.

Diamox overseas

It is safer to obtain Diamox online in the UK than to buy it overseas. We supply genuine Diamox from a UK registered pharmacy. Overseas tablets could be fake, out of date, or substandard.

Patient information leaflet

The 'Patient Information Leaflet' supplied with tablets must be read before taking.

Acetazolamide 250mg Patient Leaflet

Start orderphoto of healthy mountaineer on mountain

The order process

Answer short medical questionnaire

Choose treatment, register, and pay

Doctor issues prescription online

Medicine posted direct from pharmacy

Customer reviews

“Fast service with good prices. UK pharmacy which is professional and you can always be confident”15 March 2018 – Michael M., London

“Just used Dr Fox for the first time. Brilliant service. Will definitely use them again for my required medication.”23 February 2018 – Steve B., Devon

“Efficient and timely. The product was effective and I would recommend”18 February 2018 – Anonymous

“Entirely hassle free transaction. I would not hesitate to recommend using Dr Fox. Indeed, I already have made a recommendation to one of my work colleagues. So simple to arrange my meds and they get delivered to my door. Perfect”07 February 2018 – Jay R., Northampton

“Everything done very professionally and efficiently from the initial consultation process to delivery”04 February 2018 – Alan J., Leicester

“Such a trustworthy on line store. It was recommended to me and I have recommended it to others, with no hesitation. Choice is good, prices excellent and I know my delivery will arrive within a day or 2. Thank you Dr Fox”25 January 2018 – Helen H., Notts

“Very quick response from the doctors and delivery. Only 3 days from order to delivery. You can't find that type of service when ordering from abroad .only in the UK you can”22 January 2018 – Antony Glen H., Brighton

“Very good service and quick delivery. Quicker than booking an appointment and waiting for ages for the prescribed medication. Thank you very much for your help and assistance.”16 January 2018 – Nigel G., Surrey

“Excellent products. Service is always good and delivery was very prompt even over the busy Xmas period.”11 January 2018 – Paul S., Southsea

“First class service, fast delivery, I have recommended DR Fox to my friends Thank you for excellence, I would highly recommended this site.”04 January 2018 – Richard B., London

“First time I had used Dr Fox but so simple and easy process and was kept informed regarding order and arrived promptly. I would definitely use again and recommend to others.”01 January 2018 – Max L., Uxbridge

“I would recommend this site its easy cheaper than the rest and delivered really fast”26 December 2017 – Andrew E., Sheffield

“A superb service and Dr Fox does not charge the disgustingly high prices of other online pharmacies.”18 December 2017 – David L., Wellington

“Order was confirmed and dispatched without issue. Arrived in 1 day well packaged and discrete if this is an issue to you. Will be using again as they are best prices online”14 December 2017 – Andy U., Plymouth

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