Clonidine is used alone or in combination with other medications to treat high blood pressure. Clonidine is in a class of medications called centrally acting alpha-agonist hypotensive agents. It works by decreasing your heart rate and relaxing the blood vessels so that blood can flow more easily through the body.
Clonidine comes as a tablet to take by mouth. It is usually taken two or three times a day at evenly spaced intervals. Take clonidine at around the same times every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take clonidine exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.
Your doctor may start you on a low dose of clonidine and gradually increase your dose, not more than once every week.
Clonidine controls high blood pressure but does not cure it. Continue to take clonidine even if you feel well. Do not stop taking clonidine without talking to your doctor. If you suddenly stop taking clonidine, it can cause a rapid rise in your blood pressure and symptoms such as nervousness, headache, and uncontrollable shaking of a part of the body. Your doctor will probably decrease your dose gradually over 2 to 4 days.
Clonidine is also used in the treatment of dysmenorrhea (severely painful cramps during menstrual period), hypertensive crisis (a condition in which your blood pressure is very high), Tourette's syndrome (a condition characterized by the need to perform repeated motions or to repeat sounds or words), attention deficit hyperactivity disorder (ADHD), menopausal hot flashes, and alcohol and opiate (narcotic) withdrawal. Clonidine is also used and as an aid in smoking cessation therapyand to diagnose pheochromocytoma (a tumor that develops on a gland near the kidneys and may cause high blood pressure and fast heart rate). Talk to your doctor about the possible risks of using this medication for your condition.
This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.
Before taking clonidine,
Your doctor may prescribe a low-salt or low-sodium diet. Follow these directions carefully.
Take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.
Clonidine may cause side effects. Tell your doctor if any of these symptoms or those listed in the SPECIAL PRECAUTIONS section, are severe or do not go away:
If you experience any of the following symptoms, call your doctor immediately:
Clonidine may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.
If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online [at Web Site] or by phone [1-800-332-1088].
Keep this medication 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). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.
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.
Symptoms of overdose may include the following:
Keep all appointments with your doctor. Your blood pressure should be checked regularly to determine your response to clonidine.
Your doctor may ask you to check your pulse (heart rate) daily and will tell you how rapid it should be. Ask your doctor or pharmacist to teach you how to take your pulse. If your pulse is slower or faster than it should be, call your doctor before taking this medication that day.
To relieve dry mouth caused by clonidine, chew gum or suck sugarless hard candy.
Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.
It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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