Gabapentin vs Pregabalin: side-by-side comparison
Gabapentin and Pregabalin belong to the same class (Gabapentinoid (alpha-2-delta ligand)). They share therapeutic approach but differ in mechanism nuances, half-life, side-effect profile and available formulations. This comparison summarises what is common and where they diverge.
| Property | Gabapentin | Pregabalin |
|---|---|---|
| Therapeutic class | Gabapentinoid (alpha-2-delta ligand) | Gabapentinoid (alpha-2-delta ligand) |
| CAS | 60142-96-3 | 148553-50-8 |
| ATC | N03AX12 | N03AX16 |
| Molecular weight | 171.24 g/mol | 159.23 g/mol |
| Brands with this active ingredient | 1 | 1 |
What they share
Both are in the Gabapentinoid (alpha-2-delta ligand) class, giving them a common pharmacological architecture and many shared safety and management points. Choice within the class comes down to mechanism nuances, half-life, side-effect profile and individual response.
Key differences
Differences within the Gabapentinoid (alpha-2-delta ligand) class are what matter in practice: half-life, route of administration, equivalent doses, specific interactions, predominant side-effect profile and accumulated clinical experience. This page frames them; the prescribing information gives quantitative detail.
Mechanisms compared
Gabapentin: Gabapentin is a structural analogue of gamma-aminobutyric acid (GABA) but does not bind GABA receptors. Pregabalin: Pregabalin 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…
Indications compared
Gabapentin: Gabapentin 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. Pregabalin: Pregabalin is approved in adults for neuropathic pain associated with diabetic peripheral neuropathy, post-herpetic neuralgia, spinal cord injury and other forms of central neuropathic pain (some markets), for generalise…
Safety profile
Gabapentin: Common adverse effects include drowsiness, dizziness, ataxia, peripheral oedema and weight gain. Pregabalin: Common adverse effects include drowsiness, dizziness, peripheral oedema, weight gain, dry mouth and blurred vision.
Frequently asked questions
Is Gabapentin better than Pregabalin? ▾
Neither is universally better. Gabapentin and Pregabalin share the Gabapentinoid (alpha-2-delta ligand) class but differ in half-life, mechanism nuances and side-effect profile. The choice depends on the patient and the prescriber.
Can Gabapentin and Pregabalin be combined? ▾
Combining two ingredients from the same Gabapentinoid (alpha-2-delta ligand) class is uncommon and, in most cases, adds no benefit over one at an appropriate dose. The decision is always the prescriber's.
Do they have the same side-effect profile? ▾
Partly yes — they share many Gabapentinoid (alpha-2-delta ligand) class effects, with nuances by mechanism and dose. The prescribing information lists differences.
Products with Gabapentin
Products with Pregabalin
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.