Duloxetine vs Gabapentin: side-by-side comparison
Duloxetine (Serotonin-norepinephrine reuptake inhibitor (SNRI)) and Gabapentin (Gabapentinoid (alpha-2-delta ligand)) belong to different therapeutic classes and are rarely substitutes for each other. The comparison is useful when a single patient is weighing both options for adjacent or overlapping needs.
| Property | Duloxetine | Gabapentin |
|---|---|---|
| Therapeutic class | Serotonin-norepinephrine reuptake inhibitor (SNRI) | Gabapentinoid (alpha-2-delta ligand) |
| CAS | 116539-59-4 | 60142-96-3 |
| ATC | N06AX21 | N03AX12 |
| Molecular weight | 297.41 g/mol | 171.24 g/mol |
| Brands with this active ingredient | 1 | 1 |
What they share
Duloxetine and Gabapentin share the common regulatory framework for prescription active ingredients, bioequivalence standards for generics, and pharmacist oversight. Beyond that, points in common are limited.
Key differences
Duloxetine acts by a different mechanism than Gabapentin, with indications that barely overlap. Comparing the two is useful when a clinician has mentioned both in the same context or the patient wants to understand why one was prescribed instead of the other.
Mechanisms compared
Duloxetine: Duloxetine inhibits the reuptake of both serotonin and norepinephrine at the synapse, with weaker effect on dopamine. Gabapentin: Gabapentin is a structural analogue of gamma-aminobutyric acid (GABA) but does not bind GABA receptors.
Indications compared
Duloxetine: Duloxetine is approved for major depressive disorder, generalised anxiety disorder, diabetic peripheral neuropathic pain, fibromyalgia, chronic musculoskeletal pain (back pain, osteoarthritis) and stress urinary incontin… 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.
Safety profile
Duloxetine: Common adverse effects include nausea (most prominent in the first 1–2 weeks), dry mouth, headache, fatigue, sleep disturbance and sexual dysfunction. Gabapentin: Common adverse effects include drowsiness, dizziness, ataxia, peripheral oedema and weight gain.
Frequently asked questions
Is Duloxetine better than Gabapentin? ▾
Duloxetine and Gabapentin are not "better or worse" — they treat different things. The sensible question is which fits your specific need.
Can Duloxetine and Gabapentin be combined? ▾
Whether they can be combined depends on the indications and the interaction profile of each. If both are in a single prescription, the prescriber has weighed it; in self-medication they should never be combined.
Do they have the same side-effect profile? ▾
No — they belong to different classes and have distinct side-effect profiles. Each has its own prescribing information.
Products with Duloxetine
Products with Gabapentin
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.