Uses of Acetazolamide Sustained-Release Capsules:

• It is used to treat or prevent altitude sickness.
• It is used to treat glaucoma.
• It may be given to you for other reasons. Talk with the doctor.

What do I need to tell my doctor BEFORE I take Acetazolamide Sustained-Release Capsules?

• If you are allergic to this medicine (acetazolamide sustained-release capsules); any part of this medicine (acetazolamide sustained-release capsules); or any other drugs, foods, or substances. Tell your doctor about the allergy and what signs you had.
• If you have a sulfa allergy.
• If you have any of these health problems: Acidic blood problem, kidney disease, liver disease, low potassium levels, low sodium levels, or poor adrenal function.
• If you are taking methazolamide.

This is not a list of all drugs or health problems that interact with this medicine (acetazolamide sustained-release capsules).

Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take this medicine (acetazolamide sustained-release capsules) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.

What are some things I need to know or do while I take Acetazolamide Sustained-Release Capsules?

• Tell all of your health care providers that you take this medicine (acetazolamide sustained-release capsules). This includes your doctors, nurses, pharmacists, and dentists.
• Avoid driving and doing other tasks or actions that call for you to be alert or have clear eyesight until you see how this medicine (acetazolamide sustained-release capsules) affects you.
• Have blood work checked as you have been told by the doctor. Talk with the doctor.
• If you are using this medicine (acetazolamide sustained-release capsules) for glaucoma, have your eye pressure checked. Talk with your doctor.
• If you have high blood sugar (diabetes), you will need to watch your blood sugar closely.
• Tell your doctor if you have signs of high or low blood sugar like breath that smells like fruit, dizziness, fast breathing, fast heartbeat, feeling confused, feeling sleepy, feeling weak, flushing, headache, more thirsty or hungry, passing urine more often, shaking, or sweating.
• This medicine may affect certain lab tests. Tell all of your health care providers and lab workers that you take this medicine (acetazolamide sustained-release capsules).
• This medicine may make you sunburn more easily. Use care if you will be in the sun. Tell your doctor if you sunburn easily while taking this drug.
• If you are also taking aspirin, talk with your doctor. Loss of hunger, fast breathing, sluggishness, coma, and death have happened in people taking high doses of aspirin with this medicine (acetazolamide sustained-release capsules).
• If you are 65 or older, use this medicine (acetazolamide sustained-release capsules) with care. You could have more side effects.
• This medicine may affect growth in children and teens in some cases. They may need regular growth checks. Talk with the doctor.
• Tell your doctor if you are pregnant, plan on getting pregnant, or are breast-feeding. You will need to talk about the benefits and risks to you and the baby.

How is this medicine (Acetazolamide Sustained-Release Capsules) best taken?

Use this medicine (acetazolamide sustained-release capsules) as ordered by your doctor. Read all information given to you. Follow all instructions closely.

• This medicine may cause you to pass urine more often. To keep from having sleep problems, try not to take too close to bedtime.
• Take with or without food. Take with food if it causes an upset stomach.
• Swallow whole. Do not chew, break, or crush.

What do I do if I miss a dose?

• Take a missed dose as soon as you think about it.
• If it is close to the time for your next dose, skip the missed dose and go back to your normal time.
• Do not take 2 doses at the same time or extra doses.

What are some side effects that I need to call my doctor about right away?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

• Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
• Signs of too much acid in the blood (acidosis) like confusion; fast breathing; fast heartbeat; a heartbeat that does not feel normal; very bad stomach pain, upset stomach, or throwing up; feeling very sleepy; shortness of breath; or feeling very tired or weak.
• Signs of electrolyte problems like mood changes, confusion, muscle pain or weakness, a heartbeat that does not feel normal, seizures, not hungry, or very bad upset stomach or throwing up.
• Change in eyesight.
• Change in hearing.
• Ringing in ears.
• A burning, numbness, or tingling feeling that is not normal.
• Pain when passing urine or blood in urine.
• Not able to pass urine or change in how much urine is passed.
• Muscle weakness.
• Change in balance.
• Trouble moving around.
• Low mood (depression).
• Feeling confused.
• Seizures.
• Rarely, very bad effects have happened with sulfa drugs. Sometimes, these have been deadly. These effects have included liver problems, blood problems, and very bad skin reactions (Stevens-Johnson syndrome/toxic epidermal necrolysis). Call your doctor right away if you have a rash; red, swollen, blistered, or peeling skin; red or irritated eyes; sores in your mouth, throat, nose, or eyes; fever, chills, or sore throat; cough that is new or worse; feeling very tired or weak; any bruising or bleeding; or signs of liver problems like dark urine, feeling tired, not hungry, upset stomach or stomach pain, light-colored stools, throwing up, or yellow skin or eyes.

What are some other side effects of Acetazolamide Sustained-Release Capsules?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

• Upset stomach or throwing up.
• Change in taste.
• Diarrhea.
• Not hungry.
• Blurred eyesight.
• Feeling dizzy, sleepy, tired, or weak.
• Headache.
• Flushing.
• Feeling nervous and excitable.

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-332-1088. You may also report side effects at https://www.fda.gov/medwatch.

If OVERDOSE is suspected:

If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

How do I store and/or throw out Acetazolamide Sustained-Release Capsules?

• Store at room temperature in a dry place. Do not store in a bathroom.
• Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
• Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.

Consumer Information Use and Disclaimer

• If your symptoms or health problems do not get better or if they become worse, call your doctor.
• Do not share your drugs with others and do not take anyone else's drugs.
• Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about this medicine (acetazolamide sustained-release capsules), please talk with your doctor, nurse, pharmacist, or other health care provider.
• If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.