Lamotriginedrug info
24 HR lamotrigine 200 MG Extended Release Oral Tablet
What it is used for
Lamotrigine extended-release tablets are indicated for: adjunctive therapy for primary generalized tonic-clonic seizures (PGTC) and partial-onset seizures with or without secondary generalization in patients aged 13 years and older. conversion to monotherapy in patients aged 13 years and older with partial-onset seizures who are receiving treatment with a single antiepileptic drug (AED).
Limitation of use: Safety and effectiveness in patients younger than 13 years have not been established.
1.1 Adjunctive
Therapy Lamotrigine extended-release tablets are indicated as adjunctive therapy for primary generalized tonic-clonic (PGTC) seizures and partial-onset seizures with or without secondary generalization in patients aged 13 years and older.
1.2 Monotherapy
Lamotrigine extended-release tablets are indicated for conversion to monotherapy in patients aged 13 years and older with partial-onset seizures who are receiving treatment with a single antiepileptic drug (AED). Safety and effectiveness of lamotrigine extended-release tablets have not been established as initial monotherapy or for simultaneous conversion to monotherapy from 2 or more concomitant AEDs.
1.3 Limitation of
Use Safety and effectiveness of lamotrigine extended-release tablets for use in patients younger than 13 years have not been established.
Text above is quoted in full from the FDA-approved drug label published by openFDA, effective August 13, 2026. Matched to this product by RxNorm code. Cross-references to other sections of the full prescribing information have been removed, since they point to a document not shown here. Nothing else is changed: no sentence is shortened, reworded or summarised.
Description
Lamotrigine, USP, an AED of the phenyltriazine class, is chemically unrelated to existing AEDs. Lamotrigine's chemical name is 3,5-diamino-6-(2,3-dichlorophenyl)- as -triazine, its molecular formula is C 9 H 7 N 5 Cl 2, and its molecular weight is 256.09. Lamotrigine USP, is a white to pale cream-colored powder and has a pK a of 5.7. Lamotrigine USP, is very slightly soluble in water (0.17 mg/mL at 25°C) and slightly soluble in 0.1 M HCl (4.1 mg/mL at 25°C).
The structural formula is: Lamotrigine extended-release tablets USP, are supplied for oral administration as 25 mg (yellow), 50 mg (green), 100 mg (beige), 200 mg (blue), 250 mg (purple) and 300 mg (gray) tablets. Each tablet contains the labeled amount of lamotrigine, USP and the following inactive ingredients: colloidal silicon dioxide, hypromellose, lactose monohydrate, macrogol, magnesium stearate, methacrylic acid copolymer dispersion, polyvinyl alcohol, talc, titanium dioxide and triethyl citrate. The 25 mg tablets also contain D&C Yellow No. 10 and FD&C Yellow No. 6. The 50 mg tablets also contain FD&C Blue No. 2 and iron oxide yellow. The 100 mg tablets also contain iron oxide red and iron oxide yellow. The 200 mg tablets also contain FD&C Blue No. 2. The 250 mg tablets also contain FD&C Blue No. 2 and FD&C Red No. 40. The 300 mg tablets also contain black iron oxide. Lamotrigine extended-release tablets, USP contain a modified-release eroding formulation as the core. The core tablets are coated with an enteric coat and have pore forming ingredient in the coat to enable a controlled release of the drug in the acidic environment of the stomach. The combinations of the modified-release core and the enteric coat are designed to control the dissolution rate of lamotrigine over a period of approximately 12 to 15 hours, leading to a gradual increase in serum lamotrigine levels. FDA approved dissolution test specifications differ from USP. Structural Formula
Text above is quoted in full from the FDA-approved drug label published by openFDA, effective August 13, 2026. Matched to this product by RxNorm code. Cross-references to other sections of the full prescribing information have been removed, since they point to a document not shown here. Nothing else is changed: no sentence is shortened, reworded or summarised.
This page reproduces regulatory text for reference. It is not medical advice, and KenyRx is not a pharmacy or a prescriber. Talk to a doctor or pharmacist about whether a medicine is right for you.
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