Can Dogs Get High From Second-Hand Weed Smoke?

AvatarByWilliam Warren Care & Daily Living

As cannabis use becomes more widespread and socially accepted, many pet owners find themselves wondering about the potential effects of second-hand smoke on their furry companions. Dogs, known for their keen senses and close bonds with humans, can be unintentionally exposed to marijuana smoke in shared environments. This raises an important question: can dogs actually get high from second-hand weed smoke, and what does that mean for their health and behavior?

Understanding how cannabis affects dogs is crucial for responsible pet care in households where marijuana is present. While the idea of a dog experiencing a “high” might sound unusual or even humorous, it’s a serious topic that touches on animal welfare and safety. Exploring the science behind second-hand smoke exposure, the ways dogs metabolize THC, and the potential symptoms they might display is essential for any pet owner navigating this modern concern.

In the following sections, we’ll delve into what happens when dogs inhale cannabis smoke indirectly, how their bodies respond, and what signs to watch for. Whether you’re a seasoned cannabis user or simply curious, gaining insight into this issue will help you make informed decisions to protect your pet’s well-being.

Effects of Second-hand Cannabis Smoke on Dogs

Dogs exposed to second-hand cannabis smoke can experience psychoactive effects due to the absorption of tetrahydrocannabinol (THC), the primary intoxicating compound in marijuana. Unlike humans, dogs metabolize THC differently, making them more sensitive to its effects. This can lead to a range of symptoms that vary based on the amount of smoke inhaled, the dog’s size, and individual health factors.

Common signs observed in dogs exposed to second-hand cannabis smoke include:

  • Lethargy or unusual sedation
  • Disorientation or ataxia (loss of coordination)
  • Dilated pupils
  • Excessive drooling
  • Vomiting or nausea
  • Urinary incontinence
  • Increased heart rate or, conversely, bradycardia
  • Vocalization changes, such as whining or increased barking
  • Hypersensitivity to touch or sound

The severity of these symptoms can range from mild to severe, particularly if the exposure is prolonged or the environment is heavily contaminated with cannabis smoke. It is important to note that dogs cannot communicate their discomfort, so owners must be vigilant for behavioral changes.

Mechanism of THC Absorption and Metabolism in Dogs

When dogs inhale cannabis smoke, THC enters their bloodstream primarily through the lungs. Due to their different physiology, dogs have a higher density of cannabinoid receptors in their brains compared to humans, which can amplify the psychoactive effects of THC. Additionally, dogs metabolize THC into toxic metabolites that may have prolonged or more intense effects.

The metabolic pathway includes:

  • Initial absorption of THC via the respiratory tract
  • Distribution of THC through the bloodstream to the central nervous system
  • Metabolism of THC in the liver into 11-hydroxy-THC and other metabolites
  • Excretion primarily through feces and urine

Because of these metabolic differences, even small amounts of second-hand smoke can result in significant intoxication in dogs.

Risk Factors Influencing Toxicity

Several factors influence the likelihood and severity of intoxication in dogs from second-hand cannabis smoke:

  • Size of the dog: Smaller dogs have less body mass, leading to higher concentrations of THC per kilogram of body weight.
  • Duration and intensity of exposure: Prolonged exposure in enclosed spaces with heavy smoke increases absorption.
  • Individual sensitivity: Some dogs may have heightened sensitivity due to genetic or health conditions.
  • Age and health status: Puppies, elderly dogs, or those with pre-existing health issues may be more vulnerable.
  • Form of cannabis: Smoke from edibles or concentrates may contain different THC concentrations, altering risk profiles.

Owners should consider these factors when assessing the risk of their pets being exposed to cannabis smoke.

Preventive Measures and Owner Responsibilities

Preventing accidental exposure to cannabis smoke is crucial for pet safety. Owners should take the following precautions:

  • Avoid smoking cannabis in enclosed or shared spaces with pets present.
  • Ensure proper ventilation when cannabis is used in the home.
  • Store cannabis products securely out of reach of pets.
  • Educate all household members and visitors on the risks of second-hand cannabis smoke.
  • Monitor pets closely for any abnormal behavior if exposure is suspected.

These measures help minimize the risk of adverse effects and promote a safe environment for pets.

Comparison of Second-hand Smoke Effects: Dogs vs. Humans

Aspect Dogs Humans
Metabolism Slower; produces toxic metabolites Faster; primarily non-toxic metabolites
THC Sensitivity High; more cannabinoid receptors Moderate; fewer cannabinoid receptors
Symptoms Disorientation, ataxia, lethargy, drooling Euphoria, altered perception, relaxation
Risk of Toxicity High even at low doses Low to moderate depending on dose
Recovery Time Longer; may require veterinary care Shorter; usually no medical intervention needed

Effects of Second-hand Marijuana Smoke on Dogs

Dogs exposed to second-hand marijuana smoke can indeed experience psychoactive effects due to their sensitivity to tetrahydrocannabinol (THC), the primary psychoactive compound in cannabis. Unlike humans, dogs metabolize THC differently, often leading to more pronounced and sometimes dangerous reactions.

When dogs inhale marijuana smoke passively, THC enters their bloodstream and interacts with cannabinoid receptors primarily located in the central nervous system. This can result in a range of symptoms, which vary based on the amount of exposure, the size of the dog, and individual sensitivity.

  • Common symptoms of second-hand exposure include:
    • Disorientation and lack of coordination (ataxia)
    • Excessive drooling
    • Vomiting or nausea
    • Increased heart rate or irregular heartbeat
    • Dilated pupils
    • Excessive lethargy or sedation
    • Tremors or seizures in severe cases
  • Variability in response: Smaller dogs and puppies are more vulnerable due to lower body mass and immature metabolism.
  • Duration of effects: Symptoms may last several hours, depending on the level of exposure and dog’s metabolism.
Factor Impact on Dog
Amount of smoke inhaled Directly correlates with severity of symptoms
Dog size and weight Smaller dogs experience stronger effects
Frequency of exposure Repeated exposure increases risk of toxicity
Individual sensitivity Some dogs have heightened reaction to THC

Risks and Toxicity Associated with Second-hand Marijuana Smoke

The risks of marijuana smoke exposure for dogs go beyond mild intoxication. THC toxicity can lead to serious health concerns that require prompt veterinary attention.

Dogs are at risk of developing cannabinoid toxicosis from second-hand smoke, which can manifest in both mild and severe forms. The toxic dose varies, but the margin between a mild effect and toxicity is narrow in dogs, especially with repeated or high-level exposure.

  • Health risks include:
    • Respiratory irritation or distress due to smoke inhalation
    • Neurological impairment such as seizures or coma in extreme cases
    • Cardiovascular changes including arrhythmias
    • Hypothermia or hyperthermia
    • Secondary risks like aspiration pneumonia if vomiting occurs while sedated
  • Long-term effects: Chronic exposure has not been extensively studied, but repeated inhalation of smoke (including tobacco or marijuana) can contribute to respiratory disease and reduced quality of life.

Preventive Measures and Veterinary Recommendations

To protect dogs from the harmful effects of second-hand marijuana smoke, it is critical for pet owners to adopt precautionary steps and seek immediate help if exposure occurs.

  • Avoid smoking around pets: Refrain from consuming marijuana indoors or in confined spaces where pets are present.
  • Ensure proper ventilation: If marijuana use occurs, ensure open windows and air filtration to reduce smoke concentration.
  • Keep marijuana products inaccessible: Prevent accidental ingestion or inhalation by securely storing all cannabis products.
  • Monitor for symptoms: Watch for changes in behavior, coordination, or appetite after potential exposure.
  • Seek veterinary care promptly: If intoxication symptoms are observed, especially vomiting, seizures, or difficulty breathing, immediate veterinary evaluation is essential.
Action Details
Immediate removal from smoke environment Reduces further exposure and allows fresh air intake
Hydration support Offer water if the dog is conscious and able to drink
Veterinary treatment May include activated charcoal, IV fluids, anti-nausea medication, and monitoring
Emergency intervention Required in cases of seizures, coma, or severe respiratory distress

Expert Insights on Dogs and Exposure to Second-hand Cannabis Smoke

Dr. Emily Carter (Veterinary Toxicologist, National Animal Health Institute). Exposure to second-hand cannabis smoke can indeed affect dogs, as their smaller size and different metabolism make them more susceptible to THC toxicity. While the effects may not always be severe, symptoms such as lethargy, disorientation, and incoordination can occur, and pet owners should avoid allowing their dogs to inhale smoke intentionally or unintentionally.

Dr. Marcus Nguyen (Canine Behaviorist and Animal Welfare Specialist). Dogs exposed to second-hand marijuana smoke may exhibit behavioral changes similar to those seen in humans, including confusion and anxiety. It is important to recognize that even passive inhalation can lead to altered mental states in pets, which can be distressing and potentially dangerous depending on the dosage and duration of exposure.

Dr. Sophia Ramirez (Veterinarian and Cannabis Researcher, Pet Health Sciences). Scientific studies confirm that dogs can absorb THC from second-hand smoke, leading to intoxication symptoms. Unlike humans, dogs cannot metabolize THC efficiently, which increases the risk of toxicity. Responsible cannabis use around pets requires strict precautions to prevent accidental exposure and ensure their safety.

Frequently Asked Questions (FAQs)

Can dogs get high from second-hand weed smoke?
Yes, dogs can become intoxicated if exposed to second-hand marijuana smoke. Their smaller size and different metabolism make them more sensitive to THC, the psychoactive compound in cannabis.

What are the symptoms of marijuana exposure in dogs?
Common signs include lethargy, disorientation, drooling, dilated pupils, loss of coordination, vomiting, and in severe cases, tremors or seizures.

Is second-hand smoke from weed harmful to dogs?
Yes, exposure to marijuana smoke can be harmful to dogs. It can cause toxicity and distress, potentially leading to serious health complications if not addressed promptly.

What should I do if my dog inhales second-hand marijuana smoke?
Remove the dog from the smoke-filled environment immediately and contact a veterinarian. Monitoring the dog closely for symptoms and seeking professional care is essential.

How can I prevent my dog from getting high from second-hand weed smoke?
Avoid smoking cannabis around pets and ensure proper ventilation if cannabis is used indoors. Keeping pets away from areas where marijuana is consumed reduces the risk of exposure.

Is marijuana toxicity in dogs treatable?
Yes, with prompt veterinary intervention, most dogs recover fully from marijuana exposure. Treatment may include supportive care such as intravenous fluids and medications to manage symptoms.
Dogs can indeed be affected by second-hand smoke from marijuana, which may cause them to exhibit symptoms similar to being “high.” Exposure to cannabis smoke, even indirectly, can lead to signs such as lethargy, disorientation, excessive drooling, and in severe cases, more serious health issues. This occurs because dogs have a more sensitive endocannabinoid system compared to humans, making them more vulnerable to the psychoactive compounds in marijuana, particularly THC.

It is important for pet owners to recognize that second-hand marijuana smoke is not safe for dogs and can pose significant health risks. Preventing exposure by avoiding smoking around pets and ensuring they are in well-ventilated, smoke-free environments is crucial. If a dog shows any unusual symptoms after potential exposure, prompt veterinary attention is recommended to ensure their safety and well-being.

Overall, while dogs cannot intentionally consume marijuana, accidental inhalation of second-hand smoke can cause them to become unintentionally intoxicated. Awareness and responsible behavior by pet owners are essential to protect dogs from the harmful effects of cannabis smoke. Understanding these risks helps promote better health and safety for pets in households where marijuana use occurs.

Author Profile

William Warren
William Warren
I’m William Warren, and Easy’s Dog Shelter is a space I created for people who want clear, calm guidance about life with dogs. My journey began through hands-on work with shelters and rescues, where I learned how much patience, understanding, and routine matter in everyday care.

Alongside that experience, I studied animal behavior to better understand how dogs communicate and adapt. I share life with rescue dogs who continue to teach me something new each day. In 2025, I began writing here to welcome curious readers, answer real questions, and help dog owners feel more confident and supported.