Hops Toxic?

Updated 2026-03-06| 2 min read| 4,839 found this helpful
Hops
1

Hops are highly toxic to dogs, particularly sighthounds and Golden Retrievers, with ingestion potentially leading to fatal outcomes.

2

Specific toxic compounds and mechanism of action for hops poisoning remain unconfirmed by leading toxicology authorities.

3

Rapidly progressive, life-threatening high fever is the primary hallmark symptom of hops poisoning in affected dogs.

FAQ

Is Hops toxic to Humans?

No confirmed toxicity data available for humans; no poisoning cases reported in peer-reviewed literature. (Unknown)

Is Hops toxic to Cats?

Toxicity status is unconfirmed; no documented clinical signs of hops poisoning in cats. (Unknown)

Is Hops toxic to Dogs?

Panting, rapid heart rate, rapid breathing, fever rising >1°C every 5 minutes (up to >41°C), seizures, sudden death. (High)

Is Hops toxic to Horses?

Toxicity status is unconfirmed; no documented clinical signs of hops poisoning in horses. (Unknown)

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Toxicity Details

Humans
Unknown

No confirmed toxicity data available for humans; no poisoning cases reported in peer-reviewed literature.

Cats
Unknown

Toxicity status is unconfirmed; no documented clinical signs of hops poisoning in cats.

Dogs
High

Panting, rapid heart rate, rapid breathing, fever rising >1°C every 5 minutes (up to >41°C), seizures, sudden death.

Horses
Unknown

Toxicity status is unconfirmed; no documented clinical signs of hops poisoning in horses.

Toxicity Snapshot

Toxic PartsEntire plant, all plant parts are toxic.
Exposure RouteIngestion is the only confirmed toxic exposure route; no skin contact or inhalation toxicity reported.
Toxic CompoundsToxic active principles are currently unconfirmed as per ASPCA and CliniTox toxicology datasets

First Aid & Prevention

First 30 Minutes

  • • Induce vomiting immediately if hops ingestion occurred within the past 2 hours and the affected dog is conscious and not seizing.
  • • Administer activated charcoal to absorb unabsorbed residual toxins once vomiting is successfully completed.
  • • Continuously monitor core body temperature, apply active cooling measures (cool water sprays, fans) if temperature exceeds 39°C (102.2°F).

Contact Vet Immediately

  • • Any confirmed or suspected ingestion of hops by a dog, regardless of quantity consumed.
  • • Onset of symptoms including excessive panting, fever, rapid heart rate, disorientation or seizures post exposure.
  • • If the exposed animal is a sighthound or Golden Retriever, even if no symptoms appear immediately after ingestion.

Prevention

  • • Store all hops products (including home brewing supplies, hop pellets, spent brewing hops) in sealed, pet-proof containers out of reach of dogs.
  • • Never feed any food, treats or homemade products containing hops to dogs of any breed.
  • • Dispose of used brewing hops in secured outdoor waste bins that pets cannot access.

Treatment & Prognosis

  • • Perform immediate gastrointestinal decontamination including emesis, activated charcoal administration, or gastric lavage for recent large ingestions.
  • • Administer dantrolene at an initial dose of 2-3 mg/kg intravenously or 3.5 mg/kg orally, followed by 3.5 mg/kg every 12 hours as clinically required.
  • • Provide supportive care including continuous temperature monitoring, anti-seizure medication, intravenous fluid therapy, and cardiac monitoring until symptoms fully resolve.
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Professional Toxicology

Scientific NameHumulus lupulus
AliasesCommon hop、European hop
Toxicity Grade
HumansUnknown
CatsUnknown
DogsHigh
HorsesUnknown
Target Organs
Thermoregulatory systemCentral nervous systemCardiovascular system
Mechanism of Action

• Exact toxic mechanism is not fully characterized; suspected to trigger unregulated excessive thermogenesis in susceptible canines

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle, sheep and goats (ruminants): Toxicity status unconfirmed; no documented cases of hops poisoning in ruminants reported to date
Poultry (chickens, ducks, turkeys): No confirmed toxicity data available; intentional feeding of hops to poultry is not recommended
Small pet rodents (guinea pigs, rats, hamsters): Toxicity status unconfirmed; no reported poisoning cases in small rodent pets
Confusion Risk

The following plants look similar and may be confused:

Other hop species Other Humulus spp.
Taxonomically and visually nearly identical to common hops; all Humulus species carry the same species-specific high toxicity risk for dogs
Common grapevine Vitis vinifera
May be confused with hops during wild foraging; grapevines and all grape products are also highly toxic to dogs, carrying kidney failure risk
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Related Toxic Plants

Marijuana
Marijuana
Cannabis sativa
Moderate to High toxicity for dogs, cats and horses; can cause neurological impairment, seizures and coma in severe cases
Common Hackberry
Common Hackberry
Celtis occidentalis
Low toxicity for most animals; ingestion of large quantities may cause mild gastrointestinal irritation
Oriental Pigeonwood
Trema orientale
Moderate toxicity for ruminants; may cause neurological symptoms including tremors and incoordination

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Data Sources

This information is for reference only and does not constitute medical advice. If ingestion or poisoning is suspected, seek medical or veterinary attention immediately.

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