What Happens at the Veterinary Hospital After My Dog Eats Marijuana? Diagnosis and Treatment of THC Toxicity

What Happens When You Arrive at the Veterinary Hospital?

When your dog arrives, our first priority is determining how sick they are right now.

Not every marijuana exposure requires hospitalization, but every patient deserves a careful evaluation.

The first few minutes are often spent gathering information while a technician evaluates your dog's vital signs.

We'll ask questions such as:

What product was eaten?

Approximately how much was consumed?

When did it happen?

Has your dog vomited?

Is your dog acting normally?

Could there have been exposure to anything else?

If you have the original packaging, bring it with you.

The amount of THC, the ingredient list, and the type of product often influence our treatment recommendations.

The Physical Examination

One of the advantages of marijuana toxicity is that many affected dogs develop a fairly recognizable pattern of findings.

During the examination, your veterinarian evaluates:

• Heart rate
• Respiratory rate
• Body temperature
• Gum color
• Hydration
• Blood pressure
• Ability to walk
• Level of consciousness
• Neurologic function

We'll also assess whether your dog is able to swallow safely, because that influences whether treatments like activated charcoal or inducing vomiting are appropriate.

Why Does My Veterinarian Recommend Blood Work?

Owners are sometimes surprised when we recommend blood tests.

After all, blood work can't tell us whether THC is present.

So why do we do it?

Because blood work tells us how the rest of your dog's body is responding.

It helps us evaluate:

• Blood sugar
• Kidney function
• Liver function
• Electrolytes
• Hydration
• Infection or inflammation

Other medical problems that could be contributing to your dog's symptoms

Blood work is also especially important if your dog may have eaten chocolate, raisins, xylitol, or another toxin in addition to THC.

Will My Dog Need X-rays?

Sometimes.

But not because we're looking for marijuana.

Unlike a swallowed toy or rock, THC doesn't show up on X-rays.

Instead, radiographs may be recommended if:

We suspect your dog also swallowed packaging.

A vape cartridge may have been ingested.

Your dog may have eaten another foreign object.

Your symptoms don't completely fit marijuana toxicity.

We're concerned about aspiration pneumonia after vomiting.

In many uncomplicated THC exposures, X-rays aren't necessary.

Can You Test My Dog for Marijuana?

This is one of the most common questions I receive.

The answer is:

Sometimes—but it's usually not as helpful as owners expect.

Human urine drug tests are designed for people, not dogs.

Because dogs metabolize THC differently, these tests can produce false-negative or occasionally false-positive results.

Even if a test is positive, it rarely changes our treatment.

Veterinarians usually diagnose marijuana toxicity based on:

• Your dog's history
• The physical examination
• The pattern of clinical signs
• Ruling out other medical conditions

In other words, the diagnosis is often made clinically rather than relying on a drug test.

Should I Make My Dog Vomit?

It depends.

If your dog ate marijuana very recently and is still bright, alert, and able to swallow normally, your veterinarian may recommend inducing vomiting before significant absorption occurs.

However, once THC begins affecting the nervous system, vomiting becomes much riskier.

A sedated dog may inhale vomit into the lungs, leading to aspiration pneumonia—a potentially life-threatening complication.

That's why timing is everything.

Please don't give hydrogen peroxide or try home remedies without first speaking to your veterinarian.

The safest option depends on your dog's condition, not simply on what they ate.

What About Activated Charcoal?

Activated charcoal is a medication that can bind certain toxins within the gastrointestinal tract and reduce further absorption.

Depending on the timing and your dog's neurological status, your veterinarian may recommend giving activated charcoal.

However, it isn't appropriate for every patient.

Dogs that are unable to swallow safely or are already significantly sedated are at increased risk of aspirating charcoal, which can cause serious lung injury.

This is another reason early veterinary evaluation is so important.

The sooner we see your dog, the more treatment options may be available.

From My Exam Room

One of the biggest misconceptions I hear is:

• "I thought if I admitted it was marijuana, you'd be upset."

Honestly?

I'm relieved.

Not because your dog got into THC—but because now we have an answer.

Knowing what caused your dog's symptoms allows us to stop chasing possibilities and start helping your pet immediately.

That honesty often saves time, money, and unnecessary testing.

And more importantly, it helps us provide the safest care possible.

How We Treat Marijuana Toxicity

One of the first questions owners ask after hearing their dog has marijuana toxicity is:

"What can you do for them?"

The answer is reassuring.

While there isn't a medication that directly reverses THC intoxication, there are many things we can do to support your dog while their body metabolizes and eliminates the drug.

Fortunately, most dogs recover completely with supportive veterinary care.

Our treatment plan depends on:

• How much THC was consumed
• What type of product was eaten
• Whether other toxins are involved
• Your dog's size
• How severe their symptoms are
• How long ago the exposure occurred

Every patient is different, which is why no two treatment plans are exactly the same.

Can the Marijuana Be Removed Before It's Absorbed?

If your dog is brought to us very soon after ingestion—and they are still bright, alert, and neurologically normal—we may be able to remove some of the THC before it has a chance to be absorbed.

Depending on the situation, this may include inducing vomiting or administering activated charcoal.

However, once THC begins affecting the nervous system, these treatments often become unsafe because of the risk of aspiration.

That is one reason why calling your veterinarian immediately after the exposure can make such a difference.

Intravenous Fluids

One of the most common treatments we use is intravenous (IV) fluid therapy.

Owners sometimes ask,

"Why does my dog need fluids if they're just high?"

IV fluids do much more than treat dehydration.

They help us:

• Maintain normal blood pressure
• Support kidney function
• Replace fluids lost through vomiting
• Correct electrolyte imbalances
• Provide a reliable route for emergency medications if needed

Fluids don't "flush the marijuana out" in the way many people imagine, but they do support the body's normal recovery process and help us respond quickly if your dog's condition changes.

Monitoring Your Dog

Some of the most important treatment isn't a medication at all.

It's careful observation.

Dogs with marijuana toxicity can change over several hours. A patient that is only mildly sleepy when they arrive may become much more sedated later as additional THC is absorbed.

Throughout hospitalization, your veterinary team will monitor:

• Heart rate
• Respiratory rate
• Blood pressure
• Body temperature
• Oxygen levels
• Neurologic status
• Ability to stand and walk
• Hydration
• Comfort level

Frequent reassessments allow us to respond quickly if complications develop.

Controlling Nausea and Vomiting

Not every dog vomits after ingesting marijuana, but many do.

Persistent vomiting increases the risk of:

• Dehydration
• Electrolyte imbalances
• Aspiration pneumonia

If your dog is nauseated, your veterinarian may administer injectable anti-nausea medications to keep them comfortable and reduce further vomiting.

Once nausea is controlled, many dogs become much more willing to eat and drink.

Keeping Your Dog Comfortable

Dogs experiencing THC intoxication often don't understand what's happening to them.

Some become frightened because they can't walk normally.

Others become extremely sensitive to light, sound, or touch.

Whenever possible, we try to create a calm environment by:

• Keeping lights dim
• Reducing loud noises
• Handling patients gently
• Providing soft bedding
• Minimizing unnecessary stimulation

Sometimes, simply allowing a dog to rest quietly is one of the most effective treatments we can provide.

Temperature Support

THC can interfere with the body's ability to regulate temperature.

Some dogs develop:

• Low body temperature (hypothermia)
• Less commonly, elevated body temperature

If your dog becomes too cold, we may use:

• Warm blankets
• Circulating warm water blankets
• Forced-air warming devices
• Warm IV fluids when appropriate

If your dog becomes overheated, we will safely cool them while closely monitoring their temperature.

Maintaining a normal body temperature helps support every organ system during recovery.

What If My Dog Has Tremors or Seizures?

Although most marijuana exposures are mild to moderate, some dogs experience significant neurologic signs.

If your dog develops:

• Severe tremors
• Muscle rigidity
• Seizures
• Extreme agitation

your veterinarian may administer medications to control these symptoms and keep your dog safe while the THC wears off.

These medications don't cure marijuana toxicity—they help protect your dog while their body recovers.

Lipid Emulsion Therapy

In certain severe cases, your veterinarian may recommend intravenous lipid emulsion therapy, sometimes called "lipid rescue."

THC is highly fat-soluble, meaning it tends to move into fatty tissues.

Lipid therapy involves administering a sterile fat emulsion through an IV catheter. The theory is that this treatment may help draw fat-soluble toxins like THC out of target tissues and into the bloodstream, where they can be more readily eliminated.

This treatment is not necessary for every patient, and research is still evolving regarding exactly which cases benefit the most.

However, in dogs with severe intoxication—particularly those exposed to highly concentrated THC products—it may be considered as part of the treatment plan.

Oxygen Therapy

Most dogs with marijuana toxicity breathe normally.

However, if a dog develops aspiration pneumonia after vomiting, significant respiratory depression, or another complication affecting oxygen levels, supplemental oxygen may be needed.

Depending on the patient's condition, oxygen may be provided through:

• Flow-by oxygen
• Nasal oxygen
• An oxygen cage

Fortunately, this is uncommon in uncomplicated marijuana intoxication.

When Does a Dog Need to Stay Overnight?

Not every dog requires hospitalization.

Dogs with very mild signs may be able to return home after evaluation and a period of observation.

Hospitalization is more likely if your dog:

• Cannot stand or walk safely
• Is repeatedly vomiting
• Has seizures or severe tremors
• Has a very slow heart rate
• Ate a highly concentrated THC product
• Ate an edible containing additional toxins
• Is very small or medically fragile
• Needs ongoing IV medications or monitoring

For many owners, hearing that their dog needs to stay overnight is upsetting.

Remember, hospitalization isn't a sign that your dog won't recover.

It simply allows us to monitor them closely during the period when symptoms are usually at their worst.

How Long Will My Dog Stay in the Hospital?

Most dogs remain hospitalized for anywhere from several hours to one day.

More severely affected patients—or those that consumed edibles with additional toxins—may require longer stays.

Before discharge, we want to see that your dog is:

• Walking safely
• Alert and responsive
• Able to eat and drink
• Maintaining normal body temperature
• Comfortable
• Stable without injectable medications

Our goal isn't simply to send your dog home.

Our goal is to send them home safely.

From My Exam Room

One of the most rewarding parts of treating marijuana toxicity is seeing how dramatically dogs improve.

A patient that arrives unable to stand, confused, and frighteningly lethargic may be wagging their tail, asking for treats, and acting like themselves again the next morning.

Those are some of my favorite discharge appointments because owners often arrive expecting the worst and leave with a healthy dog ready to go home.

That's why I encourage owners not to panic. The signs can look dramatic, but with prompt veterinary care, the outlook for most dogs is excellent.