This medication is used to treat high pressure inside the eye due to certain types of glaucoma. Lowering high pressure inside the eye helps to prevent blindness, vision loss, and nerve damage. Methazolamide belongs to a class of drugs known as carbonic anhydrase inhibitors. It works by decreasing the production of fluid inside the eye.
Take this medication by mouth as directed by your doctor, usually 2 or 3 times a day. This medication may be taken with food if stomach upset occurs. To reduce your risk of certain side effects (kidney stones), drink plenty of fluids unless otherwise directed by your doctor.
The dosage is based on your medical condition and response to treatment.
Use this medication regularly to get the most benefit from it. To help you remember, take it at the same times each day. Keep taking this medication even if you feel well. Most people with glaucoma or high pressure in the eye(s) do not feel sick.
Nausea, loss of appetite, change in taste, vomiting, diarrhea, frequent urination, dizziness, drowsiness, or tiredness may occur as your body adjusts to the medication. If any of these effects last or get worse, tell your doctor or pharmacist promptly.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, such as: signs of kidney stones (such as painful urination, fever, chills, pink/bloody urine), signs of infection (such as sore throat that doesn't go away, fever, chills), easy bleeding/bruising, numbness or tingling of hands/feet, ringing in the ears.
Get medical help right away if you have any very serious side effects, such as: nausea/vomiting that doesn't stop, loss of appetite, stomach/abdominal pain, yellowing of eyes/skin, dark urine, confusion, fast/pounding heartbeat, seizures.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, such as: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Before taking methazolamide, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: adrenal gland problems (such as Addison's disease), liver disease (such as cirrhosis), breathing problems (such as chronic obstructive pulmonary disease-COPD, emphysema, lung infection), diabetes, gout, kidney problems (such as history of kidney stones), untreated mineral imbalance (such as low sodium/potassium, hyperchloremic acidosis), overactive thyroid (hyperthyroidism).
This drug may make you dizzy or drowsy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic beverages.
This medication may make you more sensitive to the sun. Avoid prolonged sun exposure, tanning booths, and sunlamps. Use a sunscreen and wear protective clothing when outdoors.
Before having surgery, tell your doctor or dentist about all the products you use (such as prescription drugs, nonprescription drugs, and herbal products).
During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.
It is unknown if this medication passes into breast milk. Consult your doctor before breast-feeding.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (such as prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
Some products that may interact with this drug are: memantine, methenamine.
Check the labels on all your medicines because they may contain aspirin or aspirin-like drugs (salicylates), which can cause serious side effects if taken in large doses with this medication. However, if your doctor has directed you to take low-dose aspirin for heart attack or stroke prevention (usually at dosages of 81-325 milligrams a day), you should continue taking it unless your doctor instructs you otherwise. Ask your doctor or pharmacist for more details.
This medication may interfere with certain lab tests, possibly causing false test results. Make sure lab personnel and all your doctors know you use this drug.
If overdose is suspected, contact a poison control center or emergency room right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center.
Do not share this medication with others.
Lab and/or medical tests (such as potassium level, complete blood count, liver function tests) should be done while you are taking this medication. Keep all medical and lab appointments. Consult your doctor for more details.
If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up.
Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
Information last revised May 2016. Copyright(c) 2016 First Databank, Inc.
With WebMD's Medicine Cabinet, you can check interactions with drugs.Go to medicine cabinet