Carbamazepine may rarely cause very serious (possibly fatal) skin reactions. Some people in certain ethnic groups (including people of Asian/South Asian descent) are at greater risk. Your doctor may order a blood test to measure your risk before prescribing this medication. If the blood test shows you are at greater risk, discuss the risks and benefits of carbamazepine and other treatment choices with your doctor. Such skin reactions have developed mostly within the first few months of treatment. Get medical help right away if you develop any of the following symptoms: skin rash/blisters/peeling, itching, or swelling. Ask your doctor or pharmacist for more details.
This drug has rarely caused very serious blood disorders (aplastic anemia, agranulocytosis). Your doctor will monitor your blood counts to minimize the chance of these side effects. Keep all medical and laboratory appointments. Tell your doctor right away if any of these rare but very serious side effects occur: signs of infection (such as fever, persistent sore throat), unusual weakness/tiredness, shortness of breath, or easy bleeding/bruising.Who should not take carbamazepine?
Carbamazepine is used to prevent and control seizures. This medication is known as an anticonvulsant or anti-epileptic drug. It is also used to relieve certain types of nerve pain (such as trigeminal neuralgia). This medication works by reducing the spread of seizure activity in the brain and restoring the normal balance of nerve activity.
OTHER USES: This section contains uses of this drug that are not listed in the approved professional labeling for the drug but that may be prescribed by your health care professional. Use this drug for a condition that is listed in this section only if it has been so prescribed by your health care professional.
This drug may also be used to treat certain mental/mood conditions (such as bipolar disorder) and other types of nerve pain.
Read the Medication Guide provided by your pharmacist before you start using carbamazepine and each time you get a refill. If you have any questions, consult your doctor or pharmacist.
If you are taking the extended-release tablets, take this medication by mouth with food as directed by your doctor, usually 2 times a day. Do not crush or chew extended-release tablets. Doing so can release all of the drug at once, increasing the risk of side effects. Also, do not split the tablets unless they have a score line and your doctor or pharmacist tells you to do so. Swallow the whole or split tablet without crushing or chewing. Inspect the tablets for chips and cracks. Do not take any damaged tablets.
If you are taking the extended-release capsules, take this medication by mouth with or without food as directed by your doctor, usually 2 times a day. Swallow the capsules whole. Do not crush or chew the capsules.
If you have trouble swallowing the capsules, you may open them and sprinkle the contents onto a teaspoonful of applesauce or other soft food. Swallow all of the drug/food mixture immediately. Do not chew the mixture or prepare a supply in advance.
The dosage is based on your medical condition and response to treatment. To reduce your risk of side effects, your doctor may direct you to start this medication at a low dose and gradually increase your dose. Follow your doctor's instructions carefully.
Avoid eating grapefruit or drinking grapefruit juice while using this medication unless your doctor or pharmacist says you may do so safely. Grapefruit can increase the chance of side effects with this medicine. Ask your doctor or pharmacist for more details.
Take this medication regularly to get the most benefit from it. To help you remember, take it at the same times each day. It is important to continue taking this medication even if you feel well.
Do not stop taking this medication without consulting your doctor. Some conditions (such as seizures) may become worse when this drug is suddenly stopped. Your dose may need to be gradually decreased.
Tell your doctor if your condition does not improve or if it worsens.
See also Warning section.
An empty tablet shell may appear in your stool. This effect is harmless because your body has already absorbed the medication.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including: mouth sores, swollen lymph nodes, persistent vomiting, severe stomach/abdominal pain, yellowing eyes/skin, dark urine, change in the amount of urine, persistent or severe headache, fainting, fast/slow/irregular heartbeat, unusual eye movements (nystagmus), vision changes (such as blurred vision), joint pain, swelling of the ankles/feet, pain/redness/swelling of the arms or legs, numbness/tingling of the hands/feet, sun sensitivity, signs of low levels of sodium in the blood (such as persistent nausea, extreme drowsiness, mental/mood changes including confusion, seizures).
A small number of people who take anticonvulsants for any condition (such as seizure, bipolar disorder, pain) may experience depression, suicidal thoughts/attempts, or other mental/mood problems. Tell your doctor immediately if you or your family/caregiver notice any unusual/sudden changes in your mood, thoughts, or behavior including signs of depression, suicidal thoughts/attempts, thoughts about harming yourself.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Before taking carbamazepine, tell your doctor or pharmacist if you are allergic to it; or to other anti-seizure medications (such as phenobarbital, phenytoin) or to tricyclic antidepressants (such as amitriptyline, desipramine); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of: decreased bone marrow function (bone marrow depression), blood disorders (such as porphyria, anemia), glaucoma, heart disease (such as coronary artery disease, heart failure, irregular heartbeat), kidney disease, liver disease, mental/mood disorders (such as depression), mineral imbalances (such as low levels of sodium or calcium in the blood ).
This drug may make you dizzy or drowsy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Avoid alcoholic beverages.
This medication may make you more sensitive to the sun. Avoid prolonged sun exposure, tanning booths, and sunlamps. Use a sunscreen and wear protective clothing when outdoors.
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
Older adults may be more sensitive to the side effects of this drug, especially, confusion, unsteadiness, or irregular heartbeat. Confusion and unsteadiness can increase the risk of falling. Older adults may also be at greater risk of developing a type of mineral imbalance (low levels of sodium in the blood), especially if they are also taking "water pills" (diuretics).
During pregnancy, this medication should be used only when clearly needed. It may harm an unborn baby. However, since untreated seizures are a serious condition that can harm both a pregnant woman and her unborn baby, do not stop taking this medication unless directed by your doctor. If you are planning pregnancy, become pregnant, or think you may be pregnant, immediately discuss with your doctor the benefits and risks of using this medication during pregnancy. If you are pregnant, prenatal care that includes tests for defects is recommended. Since birth control pills, patches, implants, and injections may not work if taken with this medication (see also Drug Interactions section), discuss reliable forms of birth control with your doctor.
This medication passes into breast milk. Consult your doctor before breast-feeding.
See also How to Use section.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
Taking MAO inhibitors with this medication may cause a serious (possibly fatal) drug interaction. Avoid taking MAO inhibitors (isocarboxazid, linezolid, methylene blue, moclobemide, phenelzine, procarbazine, rasagiline, selegiline, tranylcypromine) during treatment with this medication. Most MAO inhibitors should also not be taken for two weeks before treatment with this medication. Ask your doctor when to start or stop taking this medication.
Other medications can affect the removal of carbamazepine from your body, which may affect how carbamazepine works. Examples include azole antifungals (such as itraconazole), macrolide antibiotics (such as erythromycin), rifamycins (such as rifabutin), St. John's wort, among others.
Carbamazepine can speed up the removal of other drugs from your body, which may affect how they work. Examples of affected drugs include artemether/lumefantrine, boceprevir, certain calcium channel blockers (such as nifedipine, nimodipine), nefazodone, HIV NNRTIs (such as delavirdine, efavirenz, etravirine, rilpivirine), praziquantel, ranolazine, voriconazole, warfarin, among others.
This medication may decrease the effectiveness of hormonal birth control such as pills, patch, or ring. This could cause pregnancy. Discuss with your doctor or pharmacist if you should use additional reliable birth control methods while using this medication. Also tell your doctor if you have any new spotting or breakthrough bleeding, because these may be signs that your birth control is not working well.
Tell your doctor or pharmacist if you are taking other products that cause drowsiness including alcohol, antihistamines (such as cetirizine, diphenhydramine), drugs for sleep or anxiety (such as alprazolam, diazepam, zolpidem), muscle relaxants, and narcotic pain relievers (such as codeine).
Check the labels on all your medicines (such as allergy or cough-and-cold products) because they may contain ingredients that cause drowsiness. Ask your pharmacist about using those products safely.
This medication may interfere with certain laboratory tests (including thyroid function, some pregnancy tests), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.
If overdose is suspected, contact a poison control center or emergency room immediately. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: slowed breathing, loss of consciousness, muscle twitching, uncontrolled movements, very fast heartbeat.
Do not share this medication with others.
Laboratory and/or medical tests (such as complete blood count, blood mineral levels, kidney/liver function, eye exams, carbamazepine blood levels) should be performed periodically to monitor your progress or check for side effects. Keep all regular medical and laboratory appointments. Consult your doctor for more details.
If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up. Call your doctor if you miss more than one dose in a day.
Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
MEDICAL ALERT: Your condition can cause complications in a medical emergency. For information about enrolling in MedicAlert, call 1-888-633-4298 (US) or 1-800-668-1507 (Canada).
Information last revised November 2013. Copyright(c) 2013 First Databank, Inc.
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