Lamotrigine - oral
Lamotrigine - oral
Rarely, serious (sometimes fatal) skin rashes have occurred while taking this medication. These rashes are more common in children than in adults. Rashes may be more likely if you start at too high a dose, if you increase your dose too quickly, or if you take this medication with certain other anti-seizure medications (valproic acid, divalproex). These rashes may occur anytime during use, but most serious rashes have occurred within 2 to 8 weeks of starting lamotrigine.
Get medical help right away if you develop any type of skin rash, or if you have other signs of a serious allergic reaction such as hives, fever, swollen lymph nodes, painful sores in the mouth or around the eyes, swelling of the face/tongue/throat, trouble breathing, or liver problems (symptoms include stomach/abdominal pain, nausea/vomiting that continues, dark urine, yellowing eyes/skin). Your doctor will tell you if you should stop taking lamotrigine. Even after you stop taking this, it is still possible for a rash to become life-threatening or cause permanent scars or other problems.
Lamotrigine is used alone or with other medications to prevent and control seizures. It may also be used to help prevent the extreme mood swings of bipolar disorder in adults.
Lamotrigine is known as an anticonvulsant or antiepileptic drug. It is thought to work by restoring the balance of certain natural substances in the brain.
This drug is not approved for use in children younger than 2 years due to an increased risk of side effects (such as infections).
Read the Medication Guide and, if available, the Patient Information Leaflet provided by your pharmacist before you start taking lamotrigine and each time you get a refill. If you have any questions, ask your doctor or pharmacist.
Take this medication by mouth with or without food as directed by your doctor. Swallow the tablets whole since chewing them may leave a bitter taste.
Dosage is based on your medical condition, response to treatment, and use of certain interacting drugs. (See also Drug Interactions section.) For children, the dosage is also based on weight.
It is very important to follow your doctor's dosing instructions exactly. The dose must be increased slowly. It may take several weeks or months to reach the best dose for you and to get the full benefit from this medication. Take this medication regularly in order to get the most benefit from it. To help you remember, take it at the same time(s) each day.
Do not stop taking this medication without consulting your doctor. Some conditions may become worse when the drug is suddenly stopped. Your dose may need to be gradually decreased. Also, if you have stopped taking this medication, do not restart lamotrigine without consulting your doctor.
Tell your doctor if your condition does not improve or if it worsens.
See also Warning section.
Dizziness, drowsiness, headache, vomiting, or upset stomach may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
A small number of people who take anticonvulsants for any condition (such as seizures, bipolar disorder, pain) may experience depression, suicidal thoughts/attempts, or other mental/mood problems. Tell your doctor right away 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.
Get medical help right away if any of these rare but serious side effects occur:
In the US -
Before taking lamotrigine, tell your doctor or pharmacist if you are allergic to it; 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:
This drug may make you dizzy or drowsy or blur your vision. Alcohol or marijuana (cannabis) can make you more dizzy or drowsy. Do not drive, use machinery, or do anything that needs alertness or clear vision until you can do it safely. Limit alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis).
Children may be at greater risk for skin rashes while taking this drug. See also Warning section.
Older adults may be more sensitive to the side effects of this drug, especially dizziness, loss of coordination, or fainting. These side effects can increase the risk of falling.
During pregnancy, this medication should be used only when clearly needed. It may harm an unborn baby. However, since untreated seizures or mental/mood problems (such as bipolar disorder) are serious conditions 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 talk to your doctor about the benefits and risks of using this medication during pregnancy. 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 drug passes into breast milk and may have undesirable effects on a nursing infant. Consult your doctor before breast-feeding.
Some products that may interact with this drug include:
Other medications can affect the removal of lamotrigine from your body, which may affect how lamotrigine works. Examples include hormonal birth control (such as pills, patches), estrogens, other medications to treat seizures (such as phenobarbital, phenytoin, primidone, valproic acid), certain HIV protease inhibitors (such as lopinavir/ritonavir, atazanavir/ritonavir), and rifampin, among others. Your doctor may need to adjust your dose of lamotrigine if you are on these medications.
This medication may decrease the effectiveness of hormonal birth control products (such as pills, patch, ring). This effect can result in pregnancy. Ask your doctor or pharmacist for details. Discuss whether 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, marijuana (cannabis), 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 urine drug screening tests), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.
If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. 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: severe drowsiness, unusual eye movements, loss of consciousness.
Do not share this medication with others.
Laboratory and/or medical tests (such as liver and kidney function tests, complete blood count) may be performed periodically to monitor your progress or check for side effects. Consult your doctor for more details.
There are different types of this medication available. Some do not have the same effects. There are also some medications that sound the same as this product. Make sure you have the right product before taking it.
It is important to take each dose at the scheduled time. 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. Take your next dose at the regular time. Do not double the dose to catch up.
Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.
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 February 2019.
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