What is lamotrigine?
Lamotrigine is an anti-epileptic medication, also called an anticonvulsant.
Lamotrigine is used alone or in combination with other medications to treat seizures in adults
and children who are at least 2 years old. Lamotrigine is also used to delay mood episodes in adults
with bipolar disorder.
Lamotrigine may also be used for other purposes not listed in this medication guide.
What should I discuss with my healthcare provider before taking lamotrigine?
You should not use this medication if you are allergic to lamotrigine.
If you have any of these other conditions, you may need a dose adjustment or special tests to
safely use this medication:
-
kidney disease;
-
liver disease; or
-
heart disease.
You may have thoughts about suicide while taking this medication. Tell your
doctor if you have new or worsening depression or suicidal thoughts during the first several months of
treatment, or whenever your dose is changed.
Your family or other caregivers should also be alert to changes in your mood or symptoms.
Your doctor will need to check you at regular visits. Do not miss any scheduled appointments.
FDA pregnancy category C. It is not known whether lamotrigine is harmful to an unborn
baby.
Taking this medication during early pregnancy can increase the risk of the baby
being born with cleft lip or cleft palate.
Tell your doctor if you are pregnant or plan to
become pregnant during treatment.
Your name may need to be listed on a lamotrigine pregnancy registry when you start using this
medication.
Lamotrigine can pass into breast milk and may harm a nursing baby. Do not use this
medication without telling your doctor if you are breast-feeding a baby.
How should I take lamotrigine?
The extended-release form of lamotrigine (Lamictal XR) may be used for different
conditions than immediate-release lamotrigine is used for. Always check your refills to make sure you
have received the correct brand and type of medicine prescribed by your doctor. Ask the pharmacist if
you have any questions about the medicine you receive at the pharmacy.
Take this medication exactly as it was prescribed for you. Do not take the medication in larger
amounts, or take it for longer than recommended by your doctor. Follow the directions on your
prescription label.
Your doctor may occasionally change your dose over several weeks or months to make sure
you get the best results from this medication.
To make sure you are taking the right dose of lamotrigine, your blood may need to be tested on
a regular basis. Do not miss any scheduled visits to your doctor.
If you are switching to lamotrigine from another anticonvulsant medication, carefully follow your
doctor's instructions about timing and dosage when switching from one drug to another.
Lamotrigine can be taken with or without food.
Take the regular lamotrigine tablet with a full glass of water.
To take the
chewable dispersible tablet
, you may either swallow it whole
with a glass of water, or chew it first and then swallow it. You may also place the tablet into 1
teaspoon of water or diluted fruit juice and allow it to disperse in the liquid for about 1 minute. Gently
swirl the liquid and then swallow all of the mixture right away. Do not save it for later use.
Do not stop taking lamotrigine without first talking to your doctor, even if you feel better.
You may have increased seizures if you stop taking lamotrigine suddenly. You will need to use less and
less before you stop the medication completely.
Contact your doctor if your seizures get worse or you have them more often while taking
lamotrigine.
Carry an ID card or wear a medical alert bracelet stating that you are taking lamotrigine, in
case of emergency. Any doctor, dentist, or emergency medical care provider who treats you should
know that you are taking a seizure medication.
Birth control pills can make lamotrigine less effective, which may result in increased seizures.
Your lamotrigine dose may need to be changed when you start or stop using birth control pills. You
may also have lamotrigine side effects during the weeks when you are taking an inactive (placebo) pill
from your birth control pack.
Tell your doctor if you plan to stop taking birth control pills.
It is important to use lamotrigine regularly to get the most benefit. Get your prescription refilled
before you run out of medicine completely.
Store this medication at room temperature away from light and moisture.
What happens if I miss a dose of lamotrigine?
Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the
missed dose and take the medicine at your next regularly scheduled time.
Do not
take
extra medicine to make up the missed dose.
Where can I get more information about lamotrigine?
Your pharmacist has information about lamotrigine written for health professionals that you may read.
What are the possible side effects of lamotrigine?
Get emergency medical help if you have any of these
signs of an allergic
reaction:
hives; fever; swollen glands; painful sores in or around your eyes or mouth;
difficulty breathing; swelling of your face, lips, tongue, or throat.
This medication may cause severe or life-threatening skin rash, especially in children and in
people who are allergic to other seizure medications. Serious skin rash may also be more likely to occur
if you are taking lamotrigine together with valproic acid (Depakene) or divalproex (Depakote). Seek
emergency medical attention if you have a fever, sore throat, swollen glands, and headache with a
severe blistering, peeling, and red skin rash.
If you have to stop taking lamotrigine because of a serious skin rash, you may not be able to
take it again in the future.
Call your doctor at once if you have any new or worsening symptoms such as: mood or
behavior changes, depression, anxiety, or if you feel agitated, hostile, restless, hyperactive (mentally or
physically), or have thoughts about suicide or hurting yourself.
Call your doctor at once if you have any of these serious side effects:
-
the first sign of any skin rash;
-
fever, sore throat, and headache with a severe blistering,
peeling, and red skin rash;
-
chest pain;
-
pale skin, easy bruising or bleeding;
-
fever, chills, body aches, flu symptoms;
-
muscle pain, tenderness, or weakness with fever or flu
symptoms and dark colored urine; or
-
nausea, stomach pain, low fever, loss of appetite, dark
urine, clay-colored stools, jaundice (yellowing of the skin or eyes).
Less serious side effects may include:
-
dizziness or drowsiness;
-
blurred vision;
-
mild nausea, vomiting, diarrhea, upset stomach;
-
headache;
-
lack of coordination;
-
weight loss;
-
sleep problems (insomnia), unusual dreams; or
-
runny or stuffy nose.
This is not a complete list of side effects and others may occur. Call your
doctor for medical advice about side effects. You may report side effects to FDA at
1-800-FDA-1088.
What is the most important information I should know about lamotrigine?
This medication may cause severe or life-threatening skin rash, especially in children and in
people who are allergic to other seizure medications. Serious skin rash may also be more likely to occur
if you are taking lamotrigine together with valproic acid (Depakene) or divalproex (Depakote). Seek
emergency medical attention if you have a fever, sore throat, swollen glands, and headache with a
severe blistering, peeling, and red skin rash.
If you have to stop taking lamotrigine because of a serious skin rash, you may not be able to
take it again in the future.
You may have thoughts about suicide while taking this medication. Your doctor will need to
check you at regular visits. Do not miss any scheduled appointments.
Call your doctor at once if you have any new or worsening symptoms such as: mood or
behavior changes, depression, anxiety, or if you feel agitated, hostile, restless, hyperactive (mentally or
physically), or have thoughts about suicide or hurting yourself.
Do not stop taking lamotrigine without first talking to your doctor, even if you feel better.
You may have increased seizures if you stop taking lamotrigine suddenly. You will need to use less and
less before you stop the medication completely.
Contact your doctor if your seizures get worse or you have them more often while taking
lamotrigine.
Taking this medication during early pregnancy can increase the risk of the
baby being born with cleft lip or cleft palate.
Tell your doctor if you are pregnant or if you
become pregnant during treatment.
What should I avoid while taking lamotrigine?
Lamotrigine can cause side effects that may impair your vision or reactions. Be careful if
you drive or do anything that requires you to be alert and able to see clearly.
What other drugs will affect lamotrigine?
Birth control pills can make lamotrigine less effective, resulting in increased seizures.
Tell your doctor if you start or stop using birth control pills while you are taking lamotrigine.
Your lamotrigine dose may need to be changed.
Before taking lamotrigine, tell your doctor if you are using any of the following drugs:
-
hormonal forms of birth control (pills, injections, implants, or skin
patches);
-
carbamazepine (Carbatrol, Tegretol);
-
divalproex (Depakote);
-
oxcarbazepine (Trileptal);
-
phenobarbital (Luminal, Solfoton);
-
primidone (Mysoline);
-
phenytoin (Dilantin);
-
rifampin (Rifadin, Rifater, Rifamate, Rimactane); or
-
valproic acid (Depakene).
This list is not complete and there may be other drugs that can interact with
lamotrigine. Tell your doctor about all the prescription and over-the-counter medications you use. This
includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using
a new medication without telling your doctor.
What happens if I have an overdose of lamotrigine?