Macadamia Nut Poisoning in Dogs

Key takeaways

Macadamia nut poisoning in dogs is caused by ingestion of a toxic dose of macadamia nuts. No other species of companion animals appear to suffer from this kind of toxicosis.

  • The precise mechanism of macadamia nut toxicosis in dogs is unknown
  • Diagnosis is based on history of exposure, there is no specific test available
  • Common symptoms of macadamia nut poisoning include vomiting, weakness, fever, and lethargy
  • Symptoms tend to resolve spontaneously within 24-48 hours
  • In severe cases, treatment includes IV fluid therapy and anti-vomiting medication
  • Prognosis is very good and most dogs do not require veterinary intervention
  • If other toxic foods are co-ingested, or the dog suffers from comorbidities, prognosis is more guarded. Complications are rare and include pancreatitis and gastrointestinal obstruction
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A closer look: Macadamia Nut Poisoning in Dogs

Macadamia nut poisoning is a non-life-threatening condition, with most affected dogs recovering completely without treatment within 48 hours of ingestion. To date, no deaths related to this toxin have been reported in dogs.

Although macadamia nuts are not severely toxic, they are often found in desserts, cookies, and trail mixes that may contain more toxic ingredients such as chocolate, xylitol or raisins.

The minimum toxic dose is approximately 1 nut per 2.2 pounds (1 kg) of body weight.

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Risk factors

In rare cases, dogs can develop health complications such as pancreatitis or intestinal obstruction. Very young, geriatric, and dogs suffering from comorbidities are more likely to develop complications.

Possible causes

Macadamia nut poisoning is caused by the ingestion of a toxic dose of macadamia nuts. The exact mechanism for macadamia nut toxicosis in dogs is not currently known.

Main symptoms

Symptoms generally appear 3-24 hours after ingestion of macadamia nuts.

Testing and diagnosis

Diagnosis of macadamia nut toxicosis is based on history of exposure to macadamia nuts. There is no specific diagnostic test to identify it, and the symptoms occur with a variety of other conditions.

Steps to Recovery

There is no antidote for macadamia nut poisoning. In most cases, treatment is not required.

When necessary, treatment involves gastrointestinal decontamination via induced vomiting. It is not currently known if activated charcoal prevents symptoms of macadamia nut toxicosis. Note: induction of vomiting and administration of activated charcoal should only be performed by a veterinary professional. There is no safe way to induce vomiting or administer activated charcoal at home.

In severe cases, treatment options include:

  • IV fluid therapy
  • Analgesics (painkillers)
  • Antiemetics (anti vomiting medication)

If complications like pancreatitis or intestinal obstruction arise, treatment focuses on addressing these more serious complications.

The prognosis for macadamia nut poisoning is generally very good with most dogs recovering without treatment in the span of 24-48 hours after ingestion.

If other potential toxins were ingested with the macadamia nuts, (e.g. chocolate, raisins, xylitol), the prognosis is more guarded and may lead to complications.


Macadamia nut exposure is prevented through proper storage and disposal of any food items that may contain macadamia nuts

Is Macadamia Nut Poisoning in Dogs common?

Since macadamia nuts are not severely toxic, many cases may go unreported. Numerous reports of dog poisoning are reported each year as canines tend to be indiscriminate eaters.

Typical Treatment

  • Benign neglect
  • Gastric decontamination
  • IV fluid therapy
  • Analgesics
  • Antiemetics

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