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Medications and Drugs

Brand Names: Thalitone

Generic Name: chlorthalidone (Pronunciation: klor THAL i done)

What is chlorthalidone (Thalitone)?

Chlorthalidone is a thiazide diuretic (water pill) that helps prevent your body from absorbing too much salt, which can cause fluid retention.

Chlorthalidone treats fluid retention (edema) in people with congestive heart failure, cirrhosis of the liver, or kidney disorders, or edema caused by taking steroids or estrogen. This medication is also used to treat high blood pressure (hypertension).

Chlorthalidone may also be used for other purposes not listed in this medication guide.

Chlorthalidone 25 mg-MYL

round, yellow, imprinted with M35

Chlorthalidone 50 mg-MYL

round, blue, imprinted with M 75

What are the possible side effects of chlorthalidone (Thalitone)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop using this medication and call your doctor at once if you have any of these serious side effects:

  • dry mouth, thirst, nausea, vomiting;
  • feeling weak, drowsy, restless, or light-headed;
  • fast or uneven heartbeat;
  • muscle pain or weakness;
  • urinating less than usual or not at all;
  • easy bruising or bleeding, unusual weakness;
  • red or purple spots on your skin;
  • numbness or tingly feeling; or
  • nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).

Less serious side effects may include:

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. You may report side effects to FDA at 1-800-FDA-1088.

What is the most important information I should know about chlorthalidone (Thalitone)?

Do not use this medication if you are allergic to chlorthalidone or if you are unable to urinate.

Before using this medication, tell your doctor if you are allergic to sulfa drugs, or if you have liver disease, kidney disease, asthma, allergies, gout, lupus, or diabetes.

Avoid drinking alcohol, which can increase some of the side effects of chlorthalidone.

Avoid becoming overheated or dehydrated during exercise and in hot weather. Follow your doctor's instructions about the type and amount of liquids you should drink. In some cases, drinking too much liquid can be as unsafe as not drinking enough.

If you are being treated for high blood pressure, keep using this medication even if you feel fine. High blood pressure often has no symptoms.



Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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