moleculefinder

Lamotrigine

C9H7Cl2N5256.09 g/mol Calculated

Also called Lamictal, Qín, Qin and Gizord.

An anticonvulsant sold as Lamictal, used for epilepsy and to hold off the low swings of bipolar disorder.

Sources and notes
  • The introductionfrom sourceMoleculeFinder curated
  • Other namesfrom sourceWikidataIts English label and aliases on Wikidata.
  • Formula and weightcomputedPubChem
  • 2D drawingcomputedPubChem structure, drawn by RDKit
  • 3D modelfrom sourcePubChem 3D conformerLoaded after the page has painted, and on a phone only when you ask for it; the 2D drawing shows until it arrives.

Where you encounter it

Dispensed on prescription, not sold on a shelf. Lamotrigine on the product labels we hold.

Medicines

LamictalAdded by the makerActive ingredient

Every product and list we hold

Sources and notes
  • The product labels and their strengthsfrom sourceDailyMed (FDA label)Each label lists the molecule as an ingredient, and an active ingredient at the strength shown.
  • How it gets therefrom sourceMoleculeFinder curatedEach mark is set by hand on our lists, never inferred; a label's ingredient is added by the maker. A row with no mark data says Not marked.
  • The line abovefrom sourceMoleculeFinder curatedFrom the group the molecule belongs to.

Explore its structure

Choose a part to light it up.

Fluorine, chlorine, bromine or iodine bonded to carbon. Each pulls electrons toward itself, and each is larger than the hydrogen the carbon would otherwise carry.

From: standard chemistry.

Sources and notes
  • The drawingcomputedPubChem structure, drawn by RDKitThe page's one shipped drawing, with the chosen part lit in amber under it.
  • The partscomputedFound by ruleEach part is found by a chemical pattern, never picked by hand atom by atom; its words say where they come from.

Properties and sources

Calculated by PubChem

Molecular formula
C9H7Cl2N5
Molecular weight
256.09 g/mol
XLogP3octanol/water, log units
1.4
Polar surface areatopological
90.7 Ų
H-bond donors
2
H-bond acceptors
5
Rotatable bonds
1
Complexity
242

Reported Hazard label (GHS), ECHA, HSDB via PubChem

Danger Toxic pictogram (GHS06) and Health hazard pictogram (GHS08); hazard statements H301, H319, H336, H361, H362, H410, H412

Reported Licence

The US Food and Drug Administration licenses Lamotrigine for human use (NDA 020241, authorized December 27, 1994). Drugs@FDA

Groups it belongs to

Category
Prescription medicine
Family
Anticonvulsants
Chemical groups
Amines, Aromatics, Halogenated
Elements
Chlorine, Nitrogen
Hazard classes
Acutely toxic, Health hazard, GHS Danger
SMILESC1=CC(=C(C(=C1)Cl)Cl)C2=C(N=C(N=N2)N)N

PubChem CID 3878 · Wikidata Q410346 · InChIKey PYZRQGJRPPTADH-UHFFFAOYSA-N · Data refreshed

How MoleculeFinder sources and labels its data

Questions
What is Lamotrigine?
An anticonvulsant sold as Lamictal, used for epilepsy and to hold off the low swings of bipolar disorder.
How toxic is Lamotrigine?
Its GHS hazard label carries the signal word Danger and the hazard pictograms Toxic and Health hazard. from source
What kind of molecule is Lamotrigine?
Lamotrigine has the formula C9H7Cl2N5 and a molecular weight of 256.09 g/mol. MoleculeFinder files it under anticonvulsants, in the prescription medicine group. from sourcefrom sourcefrom sourcefrom source
What else is Lamotrigine called?
Lamotrigine is also called Qín, Qin, Gizord and Lamictal. from source
Who licenses Lamotrigine as a medicine?
The US Food and Drug Administration licenses Lamotrigine for human use (NDA 020241, authorized December 27, 1994). from source
Sources and notes
  • Calculated valuescomputedPubChemComputed from the structure, so no laboratory conditions apply; complexity is PubChem's own structural score.
  • Hazard labelfrom sourceECHA, HSDB via PubChemThe label combines these classifications.
  • ECHAfrom sourceAttributionSource: European Chemicals Agency, echa.europa.eu.
  • Licencefrom sourceDrugs@FDARead 2026-10-21.
  • Data refreshedfrom sourceMoleculeFinder2026-11-09