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Diamox
Acetazolamide
$102.00
250mg · 6 × 30 tablets · 3 months supply
GenericGeneric medicine· By Taro
$34.00 per month
How long a supply?
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Annual cost
$408a year at this pack size
Prescription required
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About Diamox
Overview
Diamox is a prescription medicine containing acetazolamide, available as tablets. It is used alongside other treatment for fluid buildup caused by congestive heart failure or medicines, certain seizure disorders, and certain types of glaucoma, including to lower eye pressure before surgery for acute angle-closure glaucoma. It is also used to prevent or reduce acute mountain sickness symptoms in people ascending rapidly or who remain very susceptible despite a gradual ascent. Acetazolamide works by blocking an enzyme called carbonic anhydrase.
What it treats
- Fluid retention (edema) due to congestive heart failure or caused by medicines, as an add-on treatment. - Certain types of epilepsy, including petit mal and unlocalized seizures, as an add-on treatment. - Chronic open-angle glaucoma, secondary glaucoma, and acute angle-closure glaucoma before surgery when surgery needs to be delayed, as an add-on treatment to lower eye pressure. - Prevention or relief of acute mountain sickness symptoms in climbers ascending rapidly or those very susceptible despite gradual ascent.
Safety information
Side effects
Reported side effects include nausea, vomiting, diarrhea, loss of appetite, changes in taste, headache, tiredness, dizziness, drowsiness, flushing, and numbness or tingling in the face, hands or feet. Increased urination, hearing changes, ringing in the ears and sensitivity to sunlight are also reported. The label does not specify how often these effects occur. Serious side effects that warrant contacting a doctor include: - Severe allergic reactions, including anaphylaxis, hives, Stevens–Johnson syndrome and toxic epidermal necrolysis. Seek immediate medical help for a severe allergic or skin reaction. - Blood disorders, including reduced red or white blood cells or platelets, and black, tarry stools. - Liver problems, including jaundice, liver failure and severe liver tissue damage. - Excess acid in the blood, low sodium or potassium, and high or low blood sugar. - Confusion, depression, agitation, problems with coordination, seizures or limp paralysis. - Kidney failure, blood or crystals in the urine, and an increased risk of kidney stones with long-term use. - Temporary short-sightedness, fluid buildup beneath the eye’s choroid or choroidal detachment. - Slowed growth in children and bone softening with long-term phenytoin therapy. Fluid buildup in the lungs unrelated to heart problems has been reported after cataract surgery during post-approval use. Its frequency and relationship to acetazolamide cannot be reliably established from these reports.
When to call your doctor
If symptoms are severe or getting worse quickly, seek emergency care rather than waiting.
Before taking this medicine
Do not take Diamox if you are allergic to acetazolamide or any tablet ingredient. Acetazolamide is a sulfonamide derivative, so an allergy to sulfonamides or related medicines may also cause a reaction. Diamox must not be used if you have low blood sodium or potassium, severe kidney or liver disease or impaired function, adrenal gland failure, or hyperchloremic acidosis (a blood acid–base imbalance). It must not be used in people with cirrhosis because it may lead to hepatic encephalopathy, a disturbance of brain function associated with liver disease. Long-term use is contraindicated in chronic noncongestive angle-closure glaucoma. Lowered eye pressure may mask worsening glaucoma while permanent closure of the drainage angle develops.
Using Diamox
Dosing
Dosing is set by your prescriber. Each health care professional may prescribe medication differently according to a patient's medical history and condition, so follow the directions on your prescription label and speak to your doctor or pharmacist before changing anything.
Storage
Store below 25°C in a dry place, in the original pack, away from direct light and moisture. Do not keep it in a bathroom. Keep all medicines out of the sight and reach of children.
Clinical information on this page is summarised from the US FDA label ACETAZOLAMIDE TABLET [A-S MEDICATION SOLUTIONS] (DailyMed, retrieved 19 September 2026).
Patient information and references
Official and supporting information to read alongside advice from your prescriber or pharmacist.
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