What is chlorthalidone-clonidine?
Clonidine lowers blood pressure by decreasing the levels of certain chemicals in your blood. This allows your blood vessels to relax and your heart to beat more slowly and easily.
Chlorthalidone is a thiazide diuretic (water pill) that helps prevent your body from absorbing too much salt, which can cause fluid retention.
The combination of clonidine and 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).
Clonidine and chlorthalidone may also be used for other purposes not listed in this medication guide.
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Precautions
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Instructions
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Side Effects
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Interactions
Precautions
Do not use this medication if you are allergic to clonidine or chlorthalidone, or if you are unable to urinate.
Before using clonidine and chlorthalidone, tell your doctor if you are allergic to any drugs, or if you have:
- kidney disease;
- liver disease;
- asthma or allergies;
- gout;
- lupus;
- diabetes; or
- if you have an allergy to sulfa drugs.
If you have any of these conditions, you may need a dose adjustment or special tests to safely take clonidine and chlorthalidone.
FDA pregnancy category C. This medication may be harmful to an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment.
Clonidine and chlorthalidone can pass into breast milk and may harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.
This medication can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.
Tell your doctor if you regularly use other medicines that make you sleepy (such as cold or allergy medicine, narcotic pain medicine, sleeping pills, muscle relaxers, and medicine for seizures, depression, or anxiety). They can add to the side effects of clonidine and chlorthalidone.
Avoid drinking alcohol, which can increase some of the side effects of clonidine and 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.
Avoid exposure to sunlight or artificial UV rays (sunlamps or tanning beds). Clonidine and chlorthalidone can make your skin more sensitive to sunlight and sunburn may result. Use a sunscreen (minimum SPF 15) and wear protective clothing if you must be out in the sun.
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Instructions
Seek emergency medical attention if you think you have used too much of this medicine. Overdose symptoms may include nausea, vomiting, weakness, drowsiness, limp feeling, pinpoint pupils, slow heart rate, shallow breathing, fainting, or seizure (convulsions).
Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at the next regularly scheduled time. Do not take extra medicine to make up the missed dose.
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Side Effects
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.
Call your doctor at once if you have a serious side effect such as:
- dry mouth, increased thirst, drowsiness, restless feeling, nausea, vomiting, increased urination, muscle pain or weakness, fast heart rate, feeling light-headed, fainting, or seizure (convulsions);
- easy bruising or bleeding, unusual weakness;
- red or purple spots on your skin;
- confusion, hallucinations;
- urinating more or less than usual, or not at all;
- feeling short of breath, even with mild exertion;
- swelling, rapid weight gain;
- 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:
- dry mouth, loss of appetite;
- diarrhea, constipation, upset stomach;
- dizziness, drowsiness;
- headache;
- feeling restless or nervous;
- sleep problems (insomnia);
- nightmares or unusual dreams;
- breast swelling or tenderness;
- mild itching or skin rash; or
- impotence or loss of interest in sex.
This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect. You may report side effects to FDA at 1-800-FDA-1088.
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Interactions
Tell your doctor about all other medications you use, especially:
- other blood pressure medications;
- lithium;
- digitalis (digoxin, Lanoxin);
- insulin or diabetes medicine taken by mouth; or
- an antidepressant such as amitriptyline (Elavil, Etrafon), amoxapine (Ascendin), clomipramine (Anafranil), desipramine (Norpramin), imipramine (Janimine, Tofranil), nortriptyline (Pamelor), protriptyline (Vivactil), or trimipramine (Surmontil).
This list is not complete and there may be other drugs that can interact with clonidine and chlorthalidone. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.
Other Names
Clorpres, chlorthalidone-clonidine, and clonidine-chlorthalidone
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Disclaimer
Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.
Copyright 1996-2004 Cerner Multum, Inc. Version 2.05. Revision date 8/23/04
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