Noise aversion in dogs: imepitoin vs placebo — LIKELY

In dogs with noise aversion, does a short course of imepitoin vs placebo reduce anxiety and fear signs over a noise event period?

Shelf #303 · gate-verified and displayed under the developer's blinded-trial rule

LIKELY: A short course of imepitoin (30 mg/kg every 12 hours for 3 consecutive days, starting 2 days before New Year's Eve fireworks) reduced owner-scored fear and anxiety versus placebo in a placebo-controlled, randomized, double-blinded clinical trial of 238 client-owned dogs with noise phobia (Engel 2019): on the 16-item owner report of fear and anxiety signs, behaviour was significantly reduced under imepitoin compared to placebo (delta -6.1 scoring points; P < .0001), and a significantly higher proportion of owners reported a good or excellent overall treatment effect on imepitoin (relative odds ratio 4.689; 95% CI, 2.79-7.89; P < .0001 — the abstract reports no absolute proportions, so none are carded here). LIKELY rather than PROBABLE because every outcome was owner-scored over a single predictable fireworks night. This shelf is imepitoin for noise aversion — a different question from imepitoin as a first-line epilepsy treatment (Shelf #288); the neighbouring noise-aversion shelf is dexmedetomidine oromucosal gel (Shelf #302). Drafted Nov 10, 2026 (VetMed build, topic #303); all figures from abstracts fetched and verified at drafting.

Engel 2019: imepitoin cut the 16-item owner fear score by 6.1 more points than placebo (P < .0001); good/excellent effect relative odds ratio 4.689

Placebo-controlled, randomized, double-blinded, clinical trial (record's own abstract wording)

Who: Dogs: 238 client-owned dogs with noise phobia recruited in veterinary clinics, in a trial using a predictable noise event as the eliciting context — the traditional New Year's Eve fireworks in Germany and the Netherlands. Owners began treatment 2 days before the anticipated noise event with either imepitoin 30 mg/kg body weight Q12h or placebo for 3 consecutive days. All outcomes were owner-scored: on New Year's Eve owners noted their observations of their dog's fear and anxiety behavior at 1600, 2200, 0020, and 0100 hours and scored the overall treatment effect on the following day; the trial is stated as double-blinded in the record, so owners scoring the outcomes were blinded to treatment.

Result: In the 16-item owner report of fear and anxiety signs, fear and anxiety behaviors were significantly reduced under imepitoin treatment compared to placebo (delta -6.1 scoring points; P < .0001). A significantly higher proportion of owners reported a good or excellent overall treatment effect in the imepitoin group compared to placebo (odds ratio 4.689; 95% CI, 2.79-7.89; P < .0001). That odds ratio is a relative measure: the abstract does not report the absolute proportions rating good or excellent in either group, and none are invented here. The record's conclusion is that imepitoin effectively controls fear and anxiety associated with noise phobia in dogs; the abstract reports no adverse-event figures.

Watch out: Owner-scored behaviour is subjective even when owners are blinded, and the whole result rests on one predictable fireworks night in two countries — thunderstorm noise and unpredictable noises were not the trialled context. The dose trialled is the epilepsy dose given for 3 days around the event (30 mg/kg twice daily), not a single as-needed dose. Neighbouring shelves: #302 (dexmedetomidine gel for the same noise-aversion problem, different drug and dosing) and #288 (imepitoin for epilepsy — a different question; this study is not carded there).

Engel O, Müller HW, Klee R, Francke B, Mills DS. Effectiveness of imepitoin for the control of anxiety and fear associated with noise phobia in dogs. J Vet Intern Med. 2019;33(6):2675-2684. PMID: 31568622. Registry ID: none in the record. MeSH: Animals · Anti-Anxiety Agents · Anxiety · Behavior, Animal · Dog Diseases · Dogs · Double-Blind Method · Fear · Imidazoles · Noise · Phobic Disorders

Synthesis: one large blinded placebo trial — imepitoin measurably lessens fireworks fear as owners score it

Synthesis

Who: Synthesis of the card above: Engel 2019 (placebo-controlled, randomized, double-blinded trial, 238 client-owned dogs with noise phobia, New Year's Eve fireworks in Germany and the Netherlands).

Result: This is the largest blinded placebo-controlled trial on this shelf's question, and both of its owner-scored endpoints separate decisively (score delta -6.1 points and relative odds ratio 4.689 for a good or excellent effect, both P < .0001). LIKELY reflects that strength, discounted for the single-event, owner-scored design it shares with the neighbouring dexmedetomidine shelf (#302).

Watch out: Treatment must start 2 days before a predictable noise event and run twice daily for 3 days — the record offers no evidence for starting imepitoin once fireworks or a storm have already begun.

Synthesis of Engel O et al. PMID: 31568622. Registry ID as on the individual card.

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