Why is this medication prescribed?   

Chlorothiazide, a 'water pill,' is used to treat high blood pressure and fluid retention caused by various conditions, including heart disease. It causes the kidneys to get rid of unneeded water and salt from the body into the urine.

This medicine is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

How should this medicine be used?  

Chlorothiazide comes as a tablet and liquid to take by mouth. It usually is taken once or twice a day. If you are to take it once a day, take it in the morning; if you are to take it twice a day, take it in the morning and in the late afternoon to avoid going to the bathroom during the night. Take this medication with meals or a snack. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take chlorothiazide exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

Chlorothizide controls high blood pressure but does not cure it. Continue to take chlorothiazide even if you feel well. Do not stop taking chlorothiazide without talking to your doctor.

Other uses for this medicine  

Chlorothiazide may also be used to treat patients with diabetes insipidus and certain electrolyte disturbances and to prevent kidney stones in patients with high levels of calcium in their blood. Talk to your doctor about the possible risks of using this medicine for your condition.

What storage conditions are needed for this medicine?  

Keep this medicine in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Do not let the oral liquid freeze. Throw away any medicine that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medicine.

In case of emergency/overdose  

In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.

What other information should I know?  

Keep all appointments with your doctor and the laboratory. Your blood pressure should be checked regularly, and blood tests should be done occasionally.

Do not let anyone else take your medicine. Ask your pharmacist any questions you have about refilling your prescription.

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