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Generic Name : Clonidine
Brand name: Catapres
Description
Clonidine (KLON-i-deen) belongs to the general class of
medicines called antihypertensives. It is
used to treat high blood pressure
(hypertension).
High blood
pressure adds to the work load of the heart and arteries. If it
continues for a long time, the heart and arteries may not function
properly. This can damage the blood vessels of the brain, heart, and
kidneys, resulting in a stroke, heart failure, or kidney failure.
Hypertension may also increase the risk of heart attacks. These
problems may be less likely to occur if blood pressure is
controlled.
Clonidine works by controlling nerve
impulses along certain nerve pathways. As a result, it relaxes blood
vessels so that blood passes through them more easily. This helps to
lower blood pressure.
Clonidine may also be used for other
conditions as determined by your doctor.
Clonidine is available only with
your doctor's prescription, in the following dosage forms:
Oral
Tablets
(U.S.and
Canada)
Transdermal
Skin patch (U.S.)
Before
Using This Medicine
In deciding to use a medicine, the risks of
taking the medicine must be weighed against the good it will do.
This is a decision you and your doctor will make. For clonidine, the following should be
considered:
Allergies—Tell your doctor if you have ever had any unusual
or allergic reaction to clonidine. Also
tell your health care professional if you are allergic to any other
substance, such as foods, preservatives, or dyes.
Pregnancy—Clonidine has not been studied in pregnant
women. However, studies in animals have shown that clonidine causes harmful effects in the fetus,
but not birth defects.
Breast-feeding—Although clonidine
passes into breast milk, it has not been reported to cause problems
in nursing babies.
Children—Children
may be more sensitive than adults to clonidine. Clonidine
overdose has been reported when children accidentally took this
medicine.
Older
adults—Dizziness or faintness may be more likely to occur in the
elderly, who are more sensitive than younger adults to the effects
of clonidine.
Other
medicines—Although certain medicines should
not be used together at all, in other cases two different medicines
may be used together even if an interaction might occur. In these
cases, your doctor may want to change the dose, or other precautions
may be necessary. When you are taking clonidine, it is especially important that your
health care professional know if you are taking any of the
following:
Beta-blockers
(acebutolol [e.g., Sectral], atenolol
[e.g., Tenormin], betaxolol [e.g., Kerlone], carteolol
[e.g., Cartrol], labetalol [e.g., Normodyne], metoprolol
[e.g., Lopressor], nadolol [e.g., Corgard], oxprenolol
[e.g., Trasicor], penbutolol [e.g., Levatol], pindolol
[e.g., Visken], propranolol [e.g., Inderal], sotalol
[e.g., Sotacor], timolol [e.g., Blocadren])—These medicines may increase the
risk of harmful effects when clonidine
treatment is stopped suddenly
Tricyclic antidepressants (amitriptyline [e.g., Elavil], amoxapine
[e.g., Asendin], clomipramine [e.g., Anafranil], desipramine [e.g., Pertofrane], doxepin
[e.g., Sinequan], imipramine [e.g., Tofranil], nortriptyline [e.g., Aventyl], protriptyline [e.g., Vivactil], trimipramine [e.g., Surmontil])—These medicines may decrease clonidine's effects on blood pressure
Other medical
problems—The presence of other medical
problems may affect the use of clonidine.
Make sure you tell your doctor if you have any other medical
problems, especially:
Heart or blood vessel disease—Clonidine may make these conditions worse
Irritated or scraped skin (with transdermal system [skin patch] only)—The
effects of clonidine may be increased if
the skin patch is placed on an area of scraped or irritated skin
because more medicine is absorbed into the body
Kidney
disease—Effects of clonidine may be
increased because of slower removal of clonidine from the body
Mental depression
(history of) or
Raynaud's
syndrome—Clonidine may make these
conditions worse
Polyarteritis nodosa or
Scleroderma or
Systemic lupus
erythematosus (SLE) (with transdermal system [skin patch] only)—Effects of
clonidine may be decreased because
absorption of this medicine into the body is blocked
Proper Use
of This Medicine
For patients taking
this medicine for high blood pressure:
In addition to the
use of the medicine your doctor has prescribed, treatment for your
high blood pressure may include weight control and care in the types
of foods you eat, especially foods high in sodium. Your doctor will
tell you which of these are most important for you. You should check
with your doctor before changing your diet.
Many patients who
have high blood pressure will not notice any signs of the problem.
In fact, many may feel normal. It is very important that you take
your medicine exactly as directed and that you keep your
appointments with your doctor even if you feel well.
Remember
that this medicine will not cure your high blood pressure but it
does help control it. Therefore, you must continue to use it as
directed if you expect to lower your blood pressure and keep it
down. You may have to take high blood pressure medicine for the rest
of your life . If high blood pressure is
not treated, it can cause serious problems such as heart failure,
blood vessel disease, stroke, or kidney disease.
For patients
using the transdermal system (skin
patch) :
Use this medicine
exactly as directed by your doctor. It will work only if applied
correctly. This medicine usually comes with patient instructions.
Read them carefully before using.
Do not try to trim or cut the
adhesive patch to adjust the dosage. Check with your doctor if you
think the medicine is not working as it should.
Apply the patch
to a clean, dry area of skin on your upper arm or chest. Choose an
area with little or no hair and free of scars, cuts, or irritation.
The system should stay in place even during showering, bathing,
or swimming. If the patch becomes loose, cover it with the extra
adhesive overlay provided. Apply a new patch if the first one
becomes too loose or falls off.
Each dose is best applied to a
different area of skin to prevent skin problems or other irritation.
After removing a used patch, fold the patch in half with the
sticky sides together. Make sure to dispose of it out of the reach
of children.
To help you remember to use your medicine, try to
get into the habit of using it at regular times. If you are taking
the tablets, take them at the same time each day. If you are using
the transdermal system (skin patch), try
to change it at the same time and day of the week.
Dosing—
The dose of clonidine will be different for different
patients. Follow your doctor's orders or the directions on the
label. The following information includes only the average doses of
clonidine used for the treatment of high
blood pressure. If your dose is different, do not change it unless
your doctor tells you to do so:
For oral dosage
form (tablets):
For high blood pressure:
Adults—100 mcg (0.1
mg) two times a day. Your doctor may increase your dose up to 200
mcg (0.2 mg) to 600 mcg (0.6 mg) a day taken in divided doses.
Children—Use and dose must be determined by your doctor.
For
transdermal dosage form (skin patch):
For high blood pressure:
Adults—One transdermal dosage system (skin patch) applied
once a week.
Children—Use and dose must be determined by your
doctor.