Asset profile

Lamotrigine

Small molecule

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Approvedregulatory verdict

Evidence outlook

Approved: Epilepsy

Regulatory approval supersedes design-level evidence grading; the trials behind approval are preserved below as the drug's evidence history.

track record: Partial signal

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Competitive landscape

66 competitors in this universe: 6 direct rivals (same mechanism and indication), 0 same-class, 60 same-indication.

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DrugStageModalityMechanismEvidence signalReported efficacygraded featured trials
Lamotrigine: this drugApprovedSmall moleculeVoltage-gated sodium channel
Eslicarbazepine Acetate (Aptiom)ApprovedSmall moleculeVoltage-gated sodium channel
FosphenytoinApprovedSmall moleculeVoltage-gated sodium channel
Oxcarbazepine (Oxtellar XR)ApprovedSmall moleculeVoltage-gated sodium channel
Oxcarbazepine (Trileptal)ApprovedSmall moleculeVoltage-gated sodium channel
RufinamideApprovedSmall moleculeVoltage-gated sodium channel
CarisbamatePhase 3Small moleculeVoltage-gated sodium channel
BrivaracetamApprovedSmall moleculeSynaptic vesicle glycoprotein 2A (SV2A)
Cannabidiol (Epidiolex)ApprovedSmall moleculeGPR55 / TRPV1 / adenosine transport (multi-target), cannabinoid
CarbamazepineApprovedSmall moleculeSodium channels
Cenobamate (Xcopri)ApprovedSmall moleculeSodium channels + GABA-A receptors
Clobazam (Onfi)ApprovedSmall moleculeGABA-A receptor
Clobazam (Sympazan)ApprovedSmall moleculeGABA-A receptor (benzodiazepine site)
DiastatApprovedCombinationGABA-A receptor
Diazepam (Valium)ApprovedSmall moleculeGABA-A receptor
Diazepam (Valtoco)ApprovedSmall moleculeGABA-A receptor

…and 51 more. Research shows the complete landscape.

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Research adds each competitor's evidence grade and sourced trial results, aligned per race, so you can see who actually has the data.

Upcoming events

(1 total)

Estimated primary-completion dates from ClinicalTrials.gov. These are registry estimates, never confirmed readout dates; they can move as trials progress.

2028 (1)
June 2028 (1)
Phase 3Bipolar Disorder Type I With ManiaRecruiting
Est. primary completion 2028-06-13 · NCT06929273 · CT.gov ↗
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All registered studies

Every ClinicalTrials.gov study of this drug's own program, grouped by indication and phase. Research unlocks the studies themselves: titles, statuses, dates and featured-trial cross-links.

Phase 3 (38)
Phase 2/3 (4)
Phase 2 (18)
Phase 1/2 (1)
Phase 1 (44)
Phase 4 (39)
Early phase / not applicable (15)
Used as active comparator (6)
Appears in other studies (4)