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Carbamazepine
Generic name: Carbamazepine
Brand names: Tegretol, Carbatrol, Epitol

Carbamazepine is used in the treatment of seizure disorders,
including certain types of epilepsy. It is also prescribed for trigeminal
neuralgia (severe pain in the jaws) and pain in the tongue and throat.
In addition, some doctors use Carbamazepine to treat alcohol withdrawal,
cocaine addiction, and emotional disorders such as depression and abnormally
aggressive behavior. Carbamazepine is also used to treat migraine headache
and "restless legs."
Most important fact about Carbamazepine
There are potentially dangerous side effects associated
with the use of Carbamazepine. If you experience symptoms such as fever,
sore throat, rash, ulcers in the mouth, easy bruising, or reddish or purplish
spots on the skin, you should notify your doctor immediately. These symptoms
could be signs of a blood disorder brought on by Carbamazepine.
How should you take Carbamazepine?
Carbamazepine should only be taken with meals, never on
an empty stomach.
If you miss a dose of Carbamazepine
Take it as soon as you remember. If it is almost time
for your next dose, skip the one you missed and go back to your regular
schedule. Do not take 2 doses at once. If you miss more than 1 dose in
a day, check with your doctor.
Storage instructions for Carbamazepine
Store Carbamazepine at room temperature. Keep the container
tightly closed. Protect the tablets from light and moisture. Keep the
liquid suspension away from light.
What side effects when taking Carbamazepine may
occur ?
Side effects of Carbamazepine cannot be anticipated. If
any develop or change in intensity, inform your doctor as soon as possible.
Only your doctor can determine if it is safe for you to continue taking
Carbamazepine.
More common side effects, especially at the start
of treatment, when taking Carbamazepine may include:
Dizziness, drowsiness, nausea, unsteadiness, vomiting.
Other side effects when taking Carbamazepine may include:
Abdominal pain, abnormal heartbeat and rhythm, abnormal involuntary movements,
abnormal sensitivity to sound, aching joints and muscles, agitation, anemia,
blood clots, blurred vision, chills, confusion, congestive heart failure,
constipation, depression, diarrhea, double vision, dry mouth and throat,
fainting and collapse, fatigue, fever, fluid retention, frequent urination,
hair loss, hallucinations, headache, hepatitis, hives, impotence, inability
to urinate, inflammation of the mouth and tongue, inflamed eyes, involuntary
movements of the eyeball, itching, kidney failure, labored breathing,
leg cramps, liver disorders, loss of appetite, loss of coordination, low
blood pressure, pancreatitis (inflammation of the pancreas), pneumonia,
reddened skin, reddish or purplish spots on the skin, reduced urine volume,
ringing in the ears, sensitivity to light, skin inflammation and scaling,
skin peeling, skin rashes, skin pigmentation changes, speech difficulties,
stomach problems, sweating, talkativeness, tingling sensation, worsening
of high blood pressure, yellow eyes and skin.
Why should Carbamazepine not be prescribed ?
You should not use Carbamazepine if you have a history of bone marrow
depression (reduced function), a sensitivity to Carbamazepine, or a sensitivity
to tricyclic antidepressant drugs such as amitriptyline (Elavil). You
should also not be taking Carbamazepine if you are on an MAO inhibitor
antidepressant such as Nardil or Parnate, or if you have taken such a
drug within the past 14 days.
Carbamazepine is not a simple pain reliever and should not be used for
the relief of minor aches and pains.
Special warnings about Carbamazepine
If you have a history of heart, liver, or kidney damage, an adverse blood
reaction to any drug, glaucoma, or serious reactions to other drugs, you
should discuss this history thoroughly with your doctor before taking
Carbamazepine.
Anticonvulsant drugs such as Carbamazepine should not be stopped abruptly
if you are taking Carbamazepine to prevent major seizures. There exists
the strong possibility of continuous epileptic attacks without return
to consciousness, leading to possible severe brain damage and death. Only
your doctor should determine if and when you should stop taking Carbamazepine.
Since dizziness and drowsiness may occur while taking Carbamazepine,
you should refrain from operating machinery or driving an automobile or
participating in any high-risk activity that requires full mental alertness
until you know how Carbamazepine affects you.
Older adults, especially, can become confused or agitated when taking
Carbamazepine.
Carbamazepine has been known to cause serious blood, liver, and skin
reactions, both early in treatment and after extended use. Alert your
doctor immediately if you develop such warning signs as fever, sore throat,
rash, ulcers in the mouth, easy bruising or spots in the skin, swollen
lymph glands, loss of appetite, nausea or vomiting, or yellowing of the
skin and eyes.
Possible food and drug interactions when taking Carbamazepine
The use of the antiseizure medications phenobarbital, phenytoin (Dilantin),
or primidone (Mysoline) may reduce the effectiveness of Carbamazepine.
Take other anticonvulsants along with Carbamazepineonly if your doctor
advises it. The use of Carbamazepine with other anticonvulsants may change
thyroid gland function.
The following drugs may also reduce the effectiveness of Carbamazepine:
cisplatin (Platinol), doxorubicin HCl (Adriamycin), felbamate (Felbatol),
rifampin (Rifadin), and theophylline (Theo-Dur).
The effectiveness of acetaminophen (Tylenol), alprazolam (Xanax), clonazepam
(Klonopin), clozapine (Clozaril), dicumarol, doxycycline (Doryx), ethosuximide
(Zarontin), haloperidol (Haldol), lamotrigine (Lamictal), methsuximide
(Celontin), oral contraceptives, phensuximide (Milontin), phenytoin (Dilantin),
theophylline (Theo-Dur), tiagabine (Gabitril), topiramate (Topamax), valproic
acid (Depakene), and warfarin (Coumadin) may be reduced when these drugs
are taken with Carbamazepine.
Carbamazepine may increase the effectiveness of clomipramine HCl (Anafranil),
phenytoin, or primidone if the drugs are taken together.
All of the following drugs may raise the amount of Carbamazepine in the
blood to harmful levels: azithromycin (Zithromax), cimetidine (Tagamet),
clarithromycin (Biaxin), danazol (Danocrine), diltiazem (Cardizem), erythromycin
(E-Mycin), fluoxetine (Prozac), isoniazid (Nydrazid), itraconazole (Sporanox),
ketoconazole (Nizoral), loratadine (Claritin), niacinamide, nicotinamide,
propoxyphene (Darvon), troleandomycin (Tao), valproate (Depakene), and
calcium channel blockers such as Calan.
Lithium (Eskalith) used with Carbamazepine may cause harmful nervous
system side effects.
If you are taking an oral contraceptive and Carbamazepine, you may experience
blood spotting and your contraceptive may not be completely reliable.
Do not combine Carbamazepine suspension with other liquid medications
such as Thorazine solution or Mellaril liquid. The mixture may congeal
internally.
Special information if you are pregnant or breastfeeding
There are no adequate safety studies regarding the use of Carbamazepine
in pregnant women. However, there have been reports of birth defects in
infants. Therefore, Carbamazepine should be used during pregnancy only
if the potential benefits justify the potential risk to the fetus. If
you are pregnant or plan on becoming pregnant, you should discuss this
with your doctor. Carbamazepine appears in breast milk. If you are breastfeeding,
your doctor may advise you to discontinue doing so if taking Carbamazepine
is essential to your health.
Recommended dosages for Carbamazepine
ADULTS
Seizures
The usual dose of Carbamazepine for adults and children over 12 years
of age is 200 milligrams (1 tablet or 2 chewable or extended-release tablets)
taken twice daily or 1 teaspoon 4 times a day. Your doctor may increase
the dose at weekly intervals by adding 200-milligram doses twice a day
for Tegretol-XR or 3 or 4 times per day for the other forms. Dosage should
generally not exceed 1,000 milligrams daily in children 12 to 15 years
old and 1,200 milligrams daily for adults and children over 15. The usual
daily maintenance dosage range is 800 to 1,200 milligrams.
Trigeminal Neuralgia
The usual dose is 100 milligrams (1 chewable or extended-release tablet)
twice or one-half teaspoon 4 times on the first day. Your doctor may increase
this dose using increments of 100 milligrams every 12 hours or one-half
teaspoonful 4 times daily only as needed to achieve freedom from pain.
Doses should not exceed 1,200 milligrams daily and are usually in the
range of 400 to 800 milligrams a day for maintenance.
CHILDREN
Seizures
The usual dose for children 6 to 12 years old is 100 milligrams twice
daily or one-half teaspoon 4 times a day. Your doctor may increase the
dose at weekly intervals by adding 100 milligrams twice a day for Carbamazepine-XR,
3 or 4 times a day for the other forms. Total daily dosage should generally
not exceed 1,000 milligrams. The usual daily dosage range for maintenance
is 400 to 800 milligrams.
The usual daily starting dose for children under 6 years of age is 10
to 20 milligrams per 2.2 pounds of body weight. The total daily dose is
divided into smaller doses taken 2 or 3 times a day for tablets or 4 times
a day for suspension. Daily dosage should not exceed 35 milligrams per
2.2 pounds.
OLDER ADULTS
To help determine the ideal dosage, your doctor may decide to periodically
check the level of Carbamazepine in your blood.
Overdosage with Carbamazepine
Any medication taken in excess can have serious consequences. If you
suspect an overdose of Carbamazepine , seek medical attention immediately.
The first signs and symptoms of an overdose of Carbamazepine appear after
1 to 3 hours.
The most prominent signs of a Carbamazepine overdose include:
Coma, convulsions, dizziness, drowsiness, inability to urinate, involuntary
rapid eye movements, irregular or reduced breathing, absence or low production
of urine, lack of coordination, low or high blood pressure, muscular twitching,
nausea, pupil dilation, rapid heartbeat, restlessness, severe muscle spasm,
shock, tremors, unconsciousness, vomiting, writhing movements.
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