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Acetylcysteine for Dog

Dog · Canis lupus familiaris · typical adult weight 2.00–80.00 kg

Acetylcysteine is used in dog for Acetaminophen toxicity (antidote), Mucolytic. Routes documented in dog: IV, Nebulization. A typical adult dog weighs 2.00–80.00 kg. ExoticRx lists 2 cited dose rules for Acetylcysteine in dog, drawn from published veterinary references. Verify against current literature before clinical use.

Trade names: Mucomyst, ACC

Dose ranges

RouteDoseFrequencyDurationIndicationEvidenceSource
IV140 mg/kgIV loading, then 70 mg/kg q4h x 17 doses72 hoursAcetaminophen toxicity (antidote)StrongPlumb's Veterinary Drug Handbook, 9th Ed
Nebulization50 mg/ml nebulizedq6-12hVariableMucolyticModeratePlumb's Veterinary Drug Handbook, 9th Ed

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Mechanism of action

Breaks disulfide bonds in mucus glycoproteins reducing viscosity (mucolytic). Also a glutathione precursor providing hepatoprotection (acetaminophen antidote).

Side effects & warnings

Dual role: mucolytic (nebulized/oral) and acetaminophen antidote (IV/oral). Bronchospasm possible with nebulization — pretreat with bronchodilator. Foul smell.

Species-specific contraindications and adverse-reaction reports for dog may differ from canine / feline reference data — consult the primary citations listed with each rule.

Other Respiratory drugs with dog dosing

Acetylcysteine dosing in other species

Why a species-specific page? Acetylcysteine pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in dog — the rules above are the citations specific to this species, not generic recommendations.

Sourced from published veterinary references; awaiting credentialed clinical reviewer. See our editorial process. Reference only — not veterinary advice.