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DIAMOX Sodium 500mg Powder for Solution for Injection

Active Ingredient:
ADVANZ Pharma See contact details
ATC code: 
About Medicine
The Patient Information Leaflet (PIL) is the leaflet included in the pack with a medicine.
Last updated on emc: 05 Dec 2023

Below is a text only representation of the Patient Information Leaflet (ePIL).

The text only version may be available in large print, Braille or audio CD. For further information call emc accessibility on {phone} 0800 198 5000. The product code(s) for this leaflet is: PL12762/0146.

DIAMOX Sodium 500mg Powder for Solution for Injection.


Diamox® Sodium 500mg Powder for

Solution for Injection


Read all of this leaflet carefully before you start taking this medicine because it contains important information for you.

Keep this leaflet. You may need to read it again.

If you have any further questions, ask your doctor or nurse.

If you get any side effects, talk to your doctor or nurse. This includes any possible side effects not listed in this leaflet. See section 4.

The name of your medicine is Diamox Sodium 500mg Powder for Solution for Injection. It will be referred to as Diamox Injection for ease of use hereafter.

What is in this leaflet

1. What Diamox Injection is and what it is used for
2. What you need to know before you are given Diamox Injection
3. How you are given Diamox Injection
4. Possible side effects
5. How to store Diamox Injection
6. Contents of the pack and other information


Diamox Injection contains the active substance Acetazolamide. This belongs to a group of medicines known as carbonic anhydrase inhibitors.

Diamox Injection is used to treat:

  • glaucoma (a condition of the eye), by reducing the pressure within the eye.
  • fluid retention
  • some forms of epilepsy (“fits”), in combination with other anti-epileptic drugs

You should NOT be given Diamox Injection if:
  • you are allergic to acetazolamide or to any of the ingredients in the medicine (listed in section 6.)
  • you are allergic to sulphonamides, sulphonamide derivatives
  • you have or have ever had severe liver disease (problems).
  • You have, or have ever had severe kidney problems
  • you have a particular type of glaucoma known as chronic non congestive angle closure glaucoma (your doctor will be able to advise you)
  • you have reduced function of the adrenal glands - glands above the kidneys - (also known as Addison's disease)
  • you have low blood levels of sodium and/or potassium or high blood levels of chlorine (your doctor will advise you)

Speak to your doctor if any of the above applies to you.

Warnings and precautions

Talk to your doctor or nurse before you are given Diamox Injection if:

  • you have or have ever had kidney problems such as kidney stones
  • you have trouble passing urine.
  • you have lung problems such as chronic bronchitis or emphysema, which causes difficulty in breathing
  • you have diabetes or problems with your blood sugar level
  • you have a history of generalised red, scaly rash (acute generalised exanthematous pustulosis [AGEP]) when treated with acetazolamide.

A small number of people being treated with anti-epileptics such as Diamox® have had thoughts of harming or killing themselves, if at any time you have these thoughts, immediately contact your doctor.

Talk to your doctor or nurse after you are given DIAMOX® if:

  • you have muscle weakness.
  • you have any allergic reaction (anaphylaxis)
  • you have or had unusual skin rash.
  • you are receiving treatment or a special diet for low levels of sodium or potassium.

A decrease in vision or eye pain could be symptoms of fluid accumulation in the vascular layer of the eye (choroidal effusion or choroidal detachment). This can happen within hours of taking Diamox Injection. Talk to your doctor promptly if you experience these symptoms.

Other medicines and Diamox injection:

Tell your doctor or nurse if you are taking or have recently taken or might take any other medicines.

The effects of any of these medicines may change, particularly if you are taking, or using, any of the following:

  • medicines for your heart such as cardiac glycosides (e.g. digoxin)
  • medicines to reduce blood pressure
  • medicines to thin your blood (e.g. warfarin)
  • medicines to lower the sugar in your blood
  • medicines for epilepsy or fits (in particular, phenytoin, primidone or carbamazepine or topiramate)
  • drugs which interfere with folic acid, eg methotrexate, pyrimethamine, or trimethoprim
  • steroids such as prednisolone
  • aspirin and related medicines, eg salicylic acid or choline salicylate for mouth ulcers
  • other drugs in the group of medicines called carbonic anhydrase inhibitors
  • amphetamines (a stimulant), quinidine (treats an irregular heartbeat), methenamine (prevents urine infections) or lithium (treats severe mental problems)
  • sodium bicarbonate therapy (used to treat acidity)
  • ciclosporin (used to suppress the immune system)

Pregnancy, breast feeding and fertility

If you are pregnant or breast-feeding, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before taking any medicines.


Diamox Injection SHOULD NOT be taken if you are pregnant, think you are pregnant or are planning to become pregnant.


It may be taken when breast feeding but only on the advice of the doctor.

Driving and using machines:

If Diamox Injection makes you feel drowsy or confused, you should not drive or operate machines.

Diamox Injection can occasionally cause short-sightedness; if this happens and you feel that you can no longer drive safely, you should stop driving and contact your doctor.

Diamox Injection contains sodium:

This medicine contains less than 1 mmol sodium (23mg) per dose, i.e. essentially “sodium-free”.


Always use this medicine exactly as your doctor has told you. Check with your doctor if you are not sure.

The recommended dose is:

i) Glaucoma:

Adults: 250 - 1000mg per 24 hours, usually in seperate doses for amounts over 250mg daily.

ii) Fluid retention (Congestive heart-failure, drug-induced oedema): The usual dose is 250 - 375mg once daily in the morning.

Fluid retention associated with pre-menstrual tension: The usual dosage is 125-375mg as a single dose.

iii) Epilepsy

Adults: The usual dosage is 250 - 1000mg daily in separate doses.

Use in Children: The usual dose is 8 - 30mg/kg in daily separate doses and should not to exceed 750mg/day.

Diamox Injection is a white powder which will be dissolved in water to make a solution for injection either into one of your veins (intravenous) or into one of your muscles (intramuscular).

The dose varies from person to person depending on their condition. Your doctor will decide on the most appropriate dose. Before starting and during treatment your doctor will monitor your blood to check that treatment with Diamox Injection is suitable for you.

If you are given more Diamox Injection than you should:

As the injection will be administered by a doctor, it is unlikely that you will be given more than is necessary.

If you have any further questions on the use of this medicine, ask your doctor or nurse.


Like all medicines, Diamox Injection can cause side effects, although not everybody gets them.

All medicines can cause allergic reactions although serious allergic reactions are very rare. Any sudden wheeziness, difficulty in breathing, swelling of the eyelids, face or lips, rash or itching (especially affecting your whole body) should be reported to a doctor immediately.

Tell your doctor immediately if you notice any of the following side effects:
  • skin rashes including an increased sensitivity to sunlight
  • Diamox Injection can affect the cells in your blood. This could mean that you are more likely to catch infections and that your blood may not clot properly.
  • sore throat or fever
  • bruises or tiny red or purple spots on your skin
  • muscles feel weak or you have fits.
  • pain in your lower back, pain or burning when you pass urine, have difficulty in passing urine, or you stop passing urine, have blood in your urine, pale stools, or if your skin or eyes look slightly yellow, stools are black or tarry, or blood in your stools.

Contact a doctor immediately if you experience a serious skin reaction: a red, scaly rash with bumps under the skin and blisters (exanthematous pustulosis). The frequency of this side effects is not known (cannot be estimated from the available data).

You may also experience the following:

Not known (frequency cannot be estimated from the available data)

  • headache
  • diarrhoea
  • feeling or being sick, loss of appetite, thirst, or a metallic taste in the mouth
  • dizziness, loss of full control of arms or legs
  • looking flushed
  • a need to pass urine more often than normal
  • glucose in the urine or cloudy urine
  • tiredness or irritability
  • feeling over-excited
  • a tingling or numbness in the fingers or toes, or coldness in the extremities
  • depression
  • drowsiness or confusion
  • a loss of interest in sex
  • ringing in the ears or difficulty in hearing
  • temporary short-sightedness which subsides when the dosage is reduced, or treatment is stopped
  • low amount of potassium, or sodium in your blood.
  • bone thinning or the risk of kidney stones.
  • high or low blood sugar levels.
  • Decrease in vision or pain in your eyes due to accumulation of fluid in the vascular layer of the eye (choroidal effusion or choroidal detachment).

Reporting of side effects:

If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme at: or search for MHRA Yellow Card in the Google Play or Apple App Store.

By reporting side effects you can help provide more information on the safety of this medicine.


Keep out of the sight and reach of children.

Do not use this medicine after the expiry date which is stated on the label and carton. The Expiry date refers to last day of that month.

Do not store above 25°C.

Any unused solution can be stored in a refrigerator for up to 24 hours but any unused solution after this period must be discarded.

For single use only.

Do not throw away any medicines via wastewater. Ask your pharmacist how to throw away medicines you no longer use. These measures will help to protect the environment.

What Diamox Injection Contains:

The active substance is acetazolamide. Each vial contains 500mg acetazolamide.

The other ingredients are sodium hydroxide, hydrochloric acid and water for injection.

What Diamox Injection look like and contents of the pack:

Diamox Injection is a white powder, packed in glass vials with a rubber ring and aluminium seal.

Before use, it is made into a solution, using at least 5ml water for injection.

Marketing Authorisation Holder and Manufacturer:
Mercury Pharmaceuticals Ltd.
Dashwood House
69 Old Broad Street
United Kingdom

This leaflet was last revised in November 2023.

Mercury Pharma Group Ltd. is licensed to use the registered trademark Diamox.

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Dashwood House, 69 Old Broad Street, London, EC2M 1QS, UK
+44 (0)208 588 9131
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