Acetazolamide is used to help prevent and reduce the symptoms of altitude sickness (acute mountain sickness). It works by helping your body adapt more quickly to lower oxygen levels at high altitude, reducing symptoms such as headache, nausea, dizziness, and shortness of breath.

Take ONE dose of 125mg (half a tablet) TWICE DAILY. Begin 1-2 days before ascent, take daily during ascent and continue for 2 days after reaching the highest altitude, or until descent begins. Further details will be provided with your medication.

Yes, your prescription order includes a short 2-day trial of Acetazolamide before you travel. This allows you to see how your body responds to the medication and become familiar with any mild side effects, such as tingling in the fingers or changes in taste.

After the trial, you’ll then take the medication as directed when you begin your ascent. This approach helps ensure the medication is suitable for you, so you can feel more confident using it at altitude.

• Acetazolamide 250mg (Dosage: 125mg – two half tablets twice a day)

Common side effects may include:

• Tingling or pins and needles in the fingers, toes, or face
• Increased urination
• Changes in taste, particularly for carbonated drinks
• Nausea or mild stomach upset

Most side effects are mild and temporary. Full details are provided in the patient information leaflet that comes with your medication. If you experience severe or persistent symptoms, seek medical advice.

Acetazolamide may not be suitable for everyone. You should inform your healthcare provider if you:

• Have kidney or liver problems
• Have a sulfonamide allergy
• Are pregnant, planning to become pregnant, or breastfeeding
• Are taking other medications

Avoid alcohol where possible and ensure you stay well hydrated. This medication should only be taken as prescribed and in line with the guidance provided.

Online medication requests are available to patients aged 18 and over. Individuals under 18 must attend a clinic appointment with a parent or guardian, where suitability for medication will be clinically assessed. Click here to book an appointment

Issues relating to returns, damage, or faulty products are handled on a case-by-case basis to ensure fair and consistent resolution.

Reporting Procedure

• In the first instance, customers must email: masta@speedshealthcare.co.uk
• The email must include:
  • Order number
  • Description of the issue
  • Photographic evidence where applicable
• Distributor will provide next steps depending on the nature of the case.

Please allow up to 5–7 working days for your order to be processed. This includes online risk assessment review, prescription, and supplier dispensing and dispatch.

Standard Delivery

Orders are dispatched using a Tracked 48-hour courier service.

Tracking Information

Tracking details will be issued by the third-party courier provided that:

• A valid mobile number and/or
• A valid email address has been supplied at the time of order.

Delivery Guarantees

• Delivery times via third-party couriers are not guaranteed.
• As a result, the distributor is not liable for any delays caused by the courier service.

If a delivery has not been received within a reasonable timeframe:

• The customer must contact MASTA on enquiries@masta.org with order details.
• MASTA will initiate an investigation and, if required, arrange a resupply of the missing goods.

The distributor is not responsible for:

• Courier delays
• Failed delivery attempts
• Customer-provided contact details that are incomplete or incorrect