Gabapentin for Pre-Visit Feline Anxiety: Evidence and Clinical Use

Bottom line

• A randomized crossover trial of 20 cats found owner-assessed stress scores during transportation and veterinary examination were significantly lower when cats received gabapentin than placebo.
• Approximately 40% of cats exhibited transient ataxia after returning home; all side effects resolved within 8 hours of administration.
• A 2025 systematic review of 20 studies concluded gabapentin produces mild-to-moderate anxiolytic, sedative, and analgesic effects in cats without adverse cardiovascular, echocardiographic, or hemodynamic consequences.
• A separate 2025 systematic review comparing gabapentin and pregabalin found both agents reduce anxiety and pain in cats, with gabapentin the more established option.
• Gabapentin is used off-label for feline anxiolysis; there is no FDA veterinary label for this indication.

Drug facts

• Class: Alpha-2-delta calcium channel ligand (anticonvulsant/analgesic/anxiolytic)
• Mechanism: Binds the alpha-2-delta subunit of voltage-gated calcium channels, reducing presynaptic calcium influx and neurotransmitter release; the anxiolytic mechanism in cats is not fully elucidated but involves modulation of excitatory neurotransmission
• Route: Oral (capsule, compounded liquid); label-supported formulations for cats not FDA-approved; per-prescriber direction
• Indication: Off-label anxiolytic/sedative for feline pre-visit stress reduction; FDA-approved in humans for epilepsy and postherpetic neuralgia
• Approval: No FDA veterinary label for feline anxiety; used off-label under veterinary supervision
• Label contraindications: No veterinary label; use with caution in cats with renal impairment given renal elimination of gabapentin
• Label common AEs (from human label, observed in cats): Sedation, ataxia, lethargy

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What the evidence shows

Randomized crossover trial: van Haaften et al., 2017

Van Haaften et al. designed a blinded, randomized crossover clinical trial enrolling 20 healthy cats with a documented history of stress or fractious behavior during veterinary visits. Each cat attended two veterinary visits one week apart, receiving gabapentin or a placebo capsule in counterbalanced order. Owner-assessed stress scores during transportation and veterinary examination were significantly lower when cats received gabapentin than when they received placebo. Veterinarian-assessed compliance scores were also significantly improved. Roughly 40% of cats were described as wobbly or ataxic after returning home, but all adverse effects resolved within approximately 8 hours.

This trial is notable for its crossover design, which controls for inter-individual variability in baseline fearfulness. Consult current formularies for dosing guidance appropriate to individual patients.

2025 systematic review: sedative, behavioral, analgesic, and cardiovascular effects

A systematic review published in 2025 (Laguardia et al., Veterinary Sciences) analyzed 20 studies selected from 543 records examining the impact of gabapentin on sedation, anxiety, behavioral modification, pain, and cardiovascular function in feline patients. The reviewers concluded that gabapentin mildly to moderately reduces anxiety in cats, with responsiveness that may vary by dose, and that it produces positive behavioral, analgesic, and sedative effects without altering cardiovascular, echocardiographic, or hemodynamic parameters. Oral administration — including administration mixed with wet or dry food — was confirmed as feasible and well tolerated.

Gabapentin vs pregabalin: comparative systematic review

A 2025 systematic review published in Veterinary Sciences compared the anxiolytic and analgesic profiles of gabapentin and pregabalin in cats. Both agents were found to reduce anxiety and pain, with gabapentin retaining the stronger published evidence base for pre-visit anxiolysis and pregabalin emerging as an alternative with a potentially more favorable pharmacokinetic profile. The review did not establish superiority of either agent and noted that head-to-head randomized clinical trials in cats are lacking.

How this fits clinical practice

Gabapentin has become one of the most widely used pre-visit pharmacological adjuncts for fearful and fractious cats in general practice. The evidence from van Haaften et al. supports administration approximately 2 to 3 hours before the scheduled visit, consistent with owner-reported peak effect timing. The 2025 systematic review reinforces that the benefit is real and not merely a sedation artifact — behavioral and analgesic improvements were distinct from cardiovascular or autonomic suppression.

Clinicians should confirm adequate renal function before initiating gabapentin in cats with suspected or known chronic kidney disease, given that gabapentin is eliminated renally and clearance may be reduced. Dose individualization and monitoring for residual sedation after the visit are recommended. Consultation of current species-specific formularies is essential for dosing.

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References

1. Van Haaften KA, Forsythe LRE, Stelow EA, Bain MJ. Effects of a single preappointment dose of gabapentin on signs of stress in cats during transportation and veterinary examination. JAVMA. 2017;251(10):1175-1181. https://avmajournals.avma.org/view/journals/javma/251/10/javma.251.10.1175.xml
2. Laguardia H et al. A Systematic Review of the Sedative, Behavioral, Analgesic and Cardiovascular Effects of Gabapentin in Cats. Veterinary Sciences. 2025;12(10):938. https://www.mdpi.com/2306-7381/12/10/938
3. Comparison of the Anxiolytic and Analgesic Effects of Gabapentin and Pregabalin in Cats: A Systematic Review. Veterinary Sciences. 2025. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12383026/

Changelog

• 2026-06-06: First published.

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