Gabapentin before veterinary visits in cats: calmer cat, safer handling? — LIKELY

In cats, does a single pre-visit dose of gabapentin vs placebo reduce stress scores and improve handleability at the clinic?

Shelf #304 · gate-verified and displayed under the developer's blinded-trial rule

LIKELY: In a randomized, blinded, crossover clinical trial in 20 healthy pet cats with a history of fractious behavior or stress at veterinary examination, owner-assessed stress scores during transportation and examination and veterinarian-assessed compliance scores were significantly lower on a single preappointment gabapentin dose (100 mg, given 90 minutes before transport) than on placebo (van Haaften 2017). A second randomised trial in 47 hyperthyroid cats likewise found significantly better second-visit transport scores (P = 0.018) and compliance scores (P = 0.019) on gabapentin 20 mg/kg vs placebo (Gurney 2022). Sedation is a common effect, which is part of how the drug achieves the calmer visit. Drafted Nov 10, 2026 (VetMed build, topic #304); all figures from abstracts fetched and verified at drafting.

van Haaften 2017: single preappointment gabapentin dose significantly lowered stress and improved compliance scores in 20 cats

Randomized, blinded, crossover clinical trial

Who: Cats: 20 healthy pet cats with a history of fractious behavior or signs of stress during veterinary examination, in a randomized, blinded, crossover clinical trial — each cat scheduled for 2 veterinary visits 1 week apart, randomly assigned to receive a capsule containing 100 mg of gabapentin (13.0 to 29.4 mg/kg) or placebo (lactose powder) prior to the first visit and the opposite treatment prior to the second, administered orally 90 minutes prior to placing the cat into a carrier.

Result: Owner-assessed cat stress scores during transportation and veterinary examination and veterinarian-assessed compliance scores were significantly lower when cats received gabapentin than when they received the placebo. Sedation was a common effect of gabapentin administration, and ataxia, hypersalivation, and vomiting were also reported; all effects resolved within 8 hours after gabapentin administration.

Watch out: Only 20 cats, healthy, and the abstract reports significance without numeric score differences, so none are invented here. Sedation and transient ataxia are effects of the treatment, not separate from it — owners should expect a sedated cat for several hours.

van Haaften KA, Eichstadt Forsythe LR, Stelow EA et al. Effects of a single preappointment dose of gabapentin on signs of stress in cats during transportation and veterinary examination. J Am Vet Med Assoc. 2017 Nov 15;251(10):1175-1181. PMID: 29099247. Registry ID: none in the record. MeSH: Amines · Animal Welfare · Animals · Anxiety · Behavior, Animal · Cats · Cross-Over Studies · Cyclohexanecarboxylic Acids · Drug Administration Schedule · Female · Gabapentin · Male · Physical Examination · Stress, Physiological · Transportation · gamma-Aminobutyric Acid

Gurney 2022: gabapentin 20 mg/kg beat placebo on transport (P = 0.018) and compliance (P = 0.019) scores in 47 hyperthyroid cats

Randomised clinical trial, blinded owners and nurses

Who: Cats: 47 cats with confirmed hyperthyroidism; at the second visit the owner (blinded to treatment) administered either liquid gabapentin 20 mg/kg (n = 22) or an indistinguishable placebo solution (n = 25) 1 hour prior to leaving home, and compliance on admission was independently assigned by two veterinary nurses blinded to treatment.

Result: There were no significant differences in baseline transport score between groups (P = 0.13), but significant differences were noted in the second visit transport score between cats medicated with gabapentin compared with placebo (P = 0.018). Mean compliance scores were significantly different between the treatment group compared with placebo (P = 0.019). Further sedation was required to complete the procedures in 24% of cats in the placebo group compared to 9% in the gabapentin group (P = 0.25). Mean plasma gabapentin concentrations were 10.1 mg/l (range 1.7-22.7) in the gabapentin group within a 1-3 hour time frame post-administration.

Watch out: A hyperthyroid population attending for procedures, and a liquid 20 mg/kg formulation given 1 hour before leaving home — a different regimen from the 100 mg capsule 90 minutes before transport in van Haaften 2017; the further-sedation difference (24% vs 9%) was not significant (P = 0.25).

Gurney M, Gower L. Randomised clinical trial evaluating the effect of a single preappointment dose of gabapentin on signs of stress in hyperthyroid cats. J Feline Med Surg. 2022 Jun;24(6):e85-e89. PMID: 35481442. Registry ID: none in the record. MeSH: Animals · Anti-Anxiety Agents · Cat Diseases · Cats · Gabapentin · Humans · Hyperthyroidism

Synthesis: one pre-visit gabapentin dose produces a calmer, more compliant cat in two blinded trials

Synthesis

Who: Synthesis of the cards above: van Haaften 2017 (randomized blinded crossover trial, 20 healthy pet cats) and Gurney 2022 (randomised blinded placebo-controlled trial, 47 hyperthyroid cats).

Result: Two independent blinded trials, in different cat populations and with different formulations and timing, both found significantly lower stress/transport scores and better compliance on gabapentin than placebo, with effects resolving within 8 hours in the crossover trial. That consistency carries LIKELY; the outcomes are scored behaviour and compliance, not a disease endpoint, and sedation is an expected part of the effect.

Watch out: Dose and timing differ between the trials (fixed 100 mg capsule at 90 minutes vs 20 mg/kg liquid at 1 hour); neither record establishes a single optimal protocol, and cats with ataxia after dosing need safe transport and supervision until effects resolve.

Synthesis of van Haaften KA et al. PMID: 29099247; Gurney M et al. PMID: 35481442. Registry IDs as on the individual cards.

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