Carbamazepine is used to relieve shock-like pain, such as the facial pain caused by trigeminal neuralgia (tic douloureux).
It is very important that you take this medicine exactly as directed by your physician in order to obtain the best results and lessen the chance of serious side effects.
Carbamazepine is not an ordinary pain reliever. It should be used only when your physician prescribes it for certain types of pain. Do not take this medication for other aches or pains.
If you miss a dose of this medication, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double dose. If you miss more than one dose in a day, check with your physician.
It is very important that your physician check your progress at regular intervals. Your physician may want to have certain tests done to see if you are receiving the correct amount of medication or to check for certain side effects of which you might be unaware.
Carbamazepine adds to the effects of alcohol and other central nervous system depressants that may cause drowsiness (e.g., antihistamines, sedatives, tranquilizers, prescription pain medications, seizure medications, muscle relaxants). Be sure that your physician knows if you are taking these or other medications.
Some people who take carbamazepine may become more sensitive to sunlight than they are normally. Exposure to sunlight, even for brief periods of time, may cause a skin rash, itching, redness or other discoloration of the skin, or severe sunburn.
Oral contraceptives (birth control pills) that contain estrogen may not work properly while you are taking carbamazepine. You should use an additional or alternative form of birth control while taking this drug.
Carbamazepine affects the urine sugar levels of diabetic patients. If you notice a change in the results of your urine sugar tests, check with your physician.
Before having any medical tests or any kind of surgical, dental, or emergency treatment, be sure to let the health care professional know that you are taking this medication.
Carbamazepine has not been studied in pregnant women. There have been reports of babies having low birth weight, small head size, skull and facial defects, underdeveloped fingernails, and delays in growth when their mothers had taken carbamazepine in high doses during pregnancy. Studies in animals have shown that carbamazepine causes birth defects when given in large doses.
Carbamazepine passes into breast milk, and the baby may receive enough of it to cause unwanted effects. In animal studies, carbamazepine has affected the growth and appearance of nursing babies.
Possible Side Effects
Side effects that typically go away as your body adjusts to the medication and do not require medical attention unless they continue for several weeks or are bothersome: clumsiness or unsteadiness*; mild dizziness*; mild drowsiness*; lightheadedness; mild nausea or vomiting; aching joints or muscles; constipation*; diarrhea; dryness of mouth; skin sensitivity to sunlight; irritation of mouth or tongue; loss or appetite; loss of hair; muscle or abdominal cramps; sexual problems in males*.
Check with your physician as soon as possible if any of the following side effects occur: blurred or double vision*; confusion; agitation; severe diarrhea, nausea, or vomiting; skin rash or hives; unusual drowsiness; chest pain; difficulty speaking or slurred speech*; fainting; frequent urination*; unusual heartbeat; mental depression or other mood or emotional changes; unusual numbness, tingling, pain, or weakness in hands or feet*; ringing or buzzing in ears; sudden decrease in urination; swelling of face, hands, feet, or lower legs; trembling; uncontrolled body movements; visual hallucinations.
Check with your physician immediately if any of the following occur: black tarry stools or blood in urine or stools; bone or joint pain; cough or hoarseness; darkening of urine; nosebleeds or other unusual bleeding or bruising; painful or difficult urination; tenderness, swelling, or bluish color in leg or foot; pale stools; pinpoint red spots on skin; shortness of breath or cough; sores, ulcers, or white spots on lips or in the mouth; sore throat, chills, and fever; swollen glands; unusual tiredness or weakness*; wheezing, tightness in chest; yellow eyes or skin.
Symptoms of overdose that require immediate attention: unusual clumsiness or unsteadiness*; severe dizziness or fainting; fast or irregular heartbeat; unusually high or low blood pressure; irregular or shallow breathing; severe nausea or vomiting; trembling, twitching, and abnormal body movements.
*Since it may be difficult to distinguish between certain common symptoms of MS and some side effects of carbamazepine, be sure to consult your health care professional if an abrupt change of this type occurs.