A 3-year-old pit bull presented cyanotic and unresponsive after suspected drug ingestion. Naloxone reversed the signs. The dog went home. Two days later, the signs came back. Naloxone worked again. Imaging showed why: eight heroin packets were still in the stomach.
What the study found
A 3-year-old intact female American Pit Bull Terrier ingested multiple heroin packets and presented with recurrent opioid toxicity. The dog was initially treated at a primary care veterinarian with naloxone (0.02 mg/kg, IM), showed improvement, was transferred to the referral hospital, and was discharged the next day. Two days after ingestion, the dog returned for potential re-exposure and was treated with naloxone (0.02 mg/kg, IV), with improvement of signs. The owner elected outpatient care due to financial constraints. Later that same day, the owner reported the dog had become sedate. Abdominal imaging confirmed foreign material in the stomach. Endoscopic retrieval was attempted and was unsuccessful. The dog underwent surgery, during which eight packets containing a white substance were removed. The dog was associated with a full recovery. This is the first published veterinary case describing ingestion of multiple heroin packets with attempted endoscopic and ultimate surgical retrieval.
How the study was built
This is a single-case report from one referral hospital, published in the Journal of Veterinary Emergency and Critical Care. The dog had possible exposures to marijuana, cocaine, oxycodone, and heroin. A case report is the lowest grade of clinical evidence, it describes what happened in one patient and cannot establish causation, prevalence, or generalizability.
The number, and its error bars
Eight packets were surgically removed. Naloxone was dosed at 0.02 mg/kg on both occasions (intramuscular first, intravenous second). The source does not report confidence intervals, p-values, or statistical analysis, this is a descriptive case, not a comparative study. No quantitative outcome measures are provided.
What the authors say it cannot tell you
The authors state that recurrent clinical signs in dogs with known narcotic ingestion should prompt clinicians to consider repeated exposure from retained drug packets. The abstract does not list methodological limitations, funding sources, or conflicts of interest. The absence of stated limitations in a case abstract is itself a limitation, the reader does not know what diagnostic uncertainty, alternative diagnoses, or follow-up gaps the full paper may discuss.
Who paid for it
The source does not state who funded the work or whether the authors declared conflicts of interest.
What this means for your practice
VeterinaryPracticeNow's read, not the study's. Everything in this section is our editorial interpretation for practice owners. The study does not claim any of it.
If a dog responds to naloxone and then re-presents with the same signs hours or days later, image the abdomen before you send them home again. The clinical win, cyanosis reversed, mentation improved, can mask the operational problem: the source is still in the GI tract, and you are now managing intermittent exposure rather than a single event. The case also flags the endoscopy-versus-surgery decision when you confirm foreign bodies on imaging. Endoscopy was attempted and failed here. Surgery became the definitive answer.
The financial-constraints piece is the other operational reality. The owner elected outpatient care after the second naloxone dose, then returned the same day when signs recurred. That is the window where imaging moves from optional to load-bearing, it is the difference between another naloxone dose and a same-day surgery that ends the cycle. If this kind of case shows up in your ER more than once a year, subscribe to VeterinaryPracticeNow.
The human-medicine parallel the authors cite, intentional swallowing of drug bundles by couriers, has an established management protocol that veterinary medicine does not. This case suggests the veterinary version is accidental ingestion in homes where drugs are present, and the clinical pattern is the same: recurrent toxicity from retained packets. The take-home is procedural, not pharmacologic. Naloxone buys you time. Imaging tells you whether time is enough.