Neurontin vs Lamictal: side-by-side comparison
Neurontin (Gabapentin) and Lamictal (Lamotrigine) both belong to the Neurological Medications class. They share clinical context but use different active ingredients. The choice between them depends on mechanism nuances, side-effect profile and individual response.
| Property | Neurontin | Lamictal |
|---|---|---|
| Active ingredient | Gabapentin | Lamotrigine |
| Manufacturer | Pfizer | GlaxoSmithKline |
| Class | Neurological Medications | Neurological Medications |
| Strengths | 100mg, 300mg, 400mg, 600mg, 800mg | 25mg, 50mg, 100mg, 200mg |
| Forms | capsule, tablet, oral solution | tablet, chewable tablet, orally disintegrating tablet, extended-release tablet |
What's the same
Neurontin and Lamictal both belong to the Neurological Medications class and are used for partially overlapping indications. The active ingredients — Gabapentin vs Lamotrigine — share the same therapeutic approach, so many safety and management points carry across both.
Key differences
Meaningful differences are in active ingredient (Gabapentin vs Lamotrigine), strengths (100mg, 300mg, 400mg, 600mg, 800mg vs 25mg, 50mg, 100mg, 200mg), forms (capsule, tablet, oral solution vs tablet, chewable tablet, orally disintegrating tablet, extended-release tablet), and the mechanism, half-life and side-effect nuances that distinguish members of the class.
Mechanism and action
Neurontin: Gabapentin binds the alpha-2-delta auxiliary subunit of voltage-gated calcium channels in the central nervous system, reducing presynaptic calcium influx and the release of excitatory neurotransmitters such as glutamate… Lamictal: Lamotrigine selectively blocks voltage-gated sodium channels, stabilising neuronal membranes and reducing the release of excitatory neurotransmitters, particularly glutamate.
When Neurontin is preferred
Neurontin is approved in adults and children aged 3 years and older as adjunctive therapy for partial-onset seizures, and in adults for post-herpetic neuralgia.
When Lamictal is preferred
Lamictal is approved in adults and children aged 2 years and older as adjunctive or monotherapy for partial-onset seizures, primary generalised tonic-clonic seizures and seizures associated with Lennox-Gastaut syndrome.
Frequently asked questions
Is Neurontin or Lamictal better? ▾
There is no single answer. Neurontin and Lamictal both belong to the Neurological Medications class but differ in mechanism nuances, half-life and side-effect profile. Preference depends on the patient, the prescriber and prior response to other therapies.
Can I switch from Neurontin to Lamictal? ▾
Switching within the Neurological Medications class is done under supervision, typically using equivalent doses and a follow-up period to confirm response and tolerance. It is not a self-directed decision.
Do Neurontin and Lamictal have the same side effects? ▾
They share many of the Neurological Medications class side effects, with differences from mechanism and dose. Each medication's prescribing information lists specifics.
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The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.