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Some commonly used brand names are:
In the U.S.—
Another commonly used name is LTG .
Lamotrigine (la-MOE-tri-jeen) is used to help control some types of seizures in the treatment of epilepsy. This medicine cannot cure epilepsy and will only work to control seizures for as long as you continue to take it. It can also be used in the treatment of bipolar disorder (manic-depressive illness) in adults older than 18 years of age.
Lamotrigine is available only with your doctor"s prescription, in the following dosage form:
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 lamotrigine, the following should be considered:
Allergies—Tell your doctor if you have ever had any unusual or allergic reaction to lamotrigine. Also tell your health care professional if you are allergic to any other substances, such as foods, preservatives, or dyes.
Pregnancy—Lamotrigine has not been studied in pregnant women. However, if you might become pregnant while taking lamotrigine, your doctor may want you to take folic acid supplements. Studies in animals have shown that lamotrigine, even when given to the mother in doses smaller than the largest human dose, may cause some offspring to die. Before taking this medicine, make sure your doctor knows if you are pregnant or if you may become pregnant.
Breast-feeding—Lamotrigine passes into breast milk. However, it is not known whether this medicine causes problems in nursing babies. Mothers who are taking lamotrigine and who wish to breast-feed should discuss this with their doctor.
Children—Skin rashes may be more likely to occur in children younger than 16 years of age than in adults. Some of these rashes may be serious and life-threatening. It is especially important that you discuss with the child"s doctor the good that this medicine may do as well as the risks of using it. Lamotrigine is not indicated for bipolar disorder in children under 18 years of age.
Older adults—Lamotrigine is removed from the body more slowly in elderly people than in younger people. Higher blood levels of the medicine may occur, which may increase the chance of unwanted effects. Your doctor may give you a different lamotrigine dose than a younger person would receive.
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 lamotrigine, it is especially important that your health care professional know if you are taking any of the following:
Other medical problems—The presence of other medical problems may affect the use of lamotrigine. Make sure you tell your doctor if you have any other medical problems, especially:
Proper Use of This Medicine
Take lamotrigine only as directed by your doctor to help your condition as much as possible and to decrease the chance of unwanted effects. Do not take more or less of this medicine, and do not take it more or less often than your doctor ordered.
Lamotrigine may be taken with or without food or on a full or empty stomach. However, if your doctor tells you to take the medicine a certain way, take it exactly as directed.
If you are taking the chewable/dispersible tablets : These tablets may be swallowed whole, chewed and swallowed, or dispersed in a small amount of liquid and swallowed. If the tablets are chewed, they should be followed with a small amount of water or diluted fruit juice to aid in swallowing. If tablets are to be dispersed: Place tablets in enough water or diluted fruit juice to cover the tablets (about a teaspoonful), wait until the tablets are completely dispersed (about 1 minute), then swirl the solution and swallow it immediately.
Dosing—The dose of lamotrigine will be different for different patients, and depends on what other medicines you are taking. Follow your doctor"s orders or the directions on the label . The following information includes only the average doses of lamotrigine. If your dose is different, do not change it unless your doctor tells you to do so.
The number of tablets that you take depends on the strength of the medicine.
Missed dose—If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.
Storage—To store this medicine:
Precautions While Using This Medicine
It is important that your doctor check your progress at regular visits , especially during the first few months of your treatment with lamotrigine. This will allow your doctor to change your dose, if necessary, and will help reduce any unwanted effects.
You should not start or stop using birth control pills or other female hormonal products while you are taking this medicine until you have consulted your doctor.
Tell your doctor right away if you experience unusual changes in your menstrual cycle such as break-through bleeding while taking lamotrigine and birth control pills or other female hormonal products.
This medicine may increase the effects of alcohol and other central nervous system (CNS) depressants (medicines that make you drowsy or less alert). Some examples of CNS depressants are antihistamines or medicine for hay fever, other allergies, or colds; sedatives, tranquilizers, or sleeping medicine; prescription pain medicine or narcotics; barbiturates; medicine for seizures; muscle relaxants; or anesthetics, including some dental anesthetics. Check with your doctor before taking any of the above while you are using this medicine .
Lamotrigine may cause blurred vision, double vision, clumsiness, unsteadiness, dizziness, or drowsiness. Make sure you know how you react to this medicine before you drive, use machines, or do anything else that could be dangerous if you are not alert, well-coordinated, or able to see well . If these reactions are especially bothersome, check with your doctor.
Skin rash may be a sign of a serious unwanted effect. Check with your doctor immediately if you develop a rash, fever, flu-like symptoms, or swollen glands, or if your seizures increase .
If suicidal thoughts or behavior occur, especially if you are taking this medicine to treat bipolar disorder, contact your doctor right away.
Do not stop taking lamotrigine without first checking with your doctor . Stopping this medicine suddenly may cause your seizures to return or to occur more often. Your doctor may want you to gradually reduce the amount you are taking before stopping completely.
Side Effects of This Medicine
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
Increase in seizures
Blistering, peeling, or loosening of skin; dark-colored urine; fever, chills, and/or sore throat; flu-like symptoms; itching; muscle cramps, pain, or weakness; red or irritated eyes; small red or purple spots on skin; sores, ulcers, or white spots on lips or in mouth; swelling of face, mouth, hands, or feet; swollen lymph nodes; trouble in breathing; unusual bleeding or bruising; unusual tiredness or weakness; yellow eyes or skin
Symptoms of overdose
Clumsiness or unsteadiness (severe); coma; continuous, uncontrolled back and forth and/or rolling eye movements (severe); dizziness (severe); drowsiness (severe); dryness of mouth (severe); headache (severe); increased heart rate; slurred speech (severe)
Check with your doctor as soon as possible if any of the following side effects occur:
Blurred or double vision or other changes in vision; clumsiness or unsteadiness; poor coordination
Anxiety, confusion, depression, irritability, or other mood or mental changes; chest pain; continuous, uncontrolled back and forth and/or rolling eye movements; infection
Incidence not known
Back, leg, or stomach pains; bleeding gums; bloating; blood in urine; bloody, black or tarry stools; bluish lips or skin; bruising; chills; confusion; constipation; cough or hoarseness; coughing or vomiting blood; dark urine; difficulty breathing; difficulty swallowing; fainting; fast heartbeat; fatigue; fever; general body swelling; general feeling of discomfort or illness or weakness; general feeling of tiredness or weakness; heartburn; high fever; lightheadedness; loss of appetite; loss of balance control; lower back or side pain; mask-like face; muscle spasms; muscle stiffness; nosebleeds; not breathing; pain or burning in throat; painful or difficult urination; pains in stomach, side, or abdomen, possibly radiating to the back; pale skin; persistent bleeding or oozing from puncture sites, mouth, or nose; rapid, shallow breathing; redness, soreness or itching skin; shortness of breath; shuffling walk; slowed movement; slurred speech; sores, welting, or blisters; stiffness of arms and legs; swollen or painful glands; tic-like [jerky] movements of head, face, mouth, and neck; tightness in chest; unexplained bleeding or bruising; wheezing
Other side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. However, check with your doctor if any of the following side effects continue or are bothersome:
Dizziness (more common in women); drowsiness; headache; nausea; vomiting
Constipation; diarrhea; dryness of mouth; indigestion; loss of strength; menstrual pain; pain; runny nose; slurred speech; trembling or shaking; trouble in sleeping; unusual weight loss
Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.
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