What are the common signs that a dog or cat has been exposed to illegal or club drugs?

Common signs include altered mental status (drowsiness or hyperexcitability), vomiting, drooling, unsteady gait, seizures, or changes in breathing. Seek veterinary care promptly if severe symptoms appear.

What information should I prepare before going to the vet if I suspect poisoning?

Record the time symptoms began, video any abnormal behaviour, keep any suspected toxin packaging or take photos, and list recent food and medication history to bring to the hospital for the vet to assess.

Can I induce vomiting or give medication at home?

Home-induced vomiting or self-medication is not recommended. The appropriate approach depends on the type of toxin and the animal's condition — consult your vet or a veterinary poison hotline by phone before taking any action.

How long does follow-up monitoring take after poisoning?

Follow-up duration depends on the toxin and clinical status, and may range from several days to a few weeks. Follow your vet's instructions for scheduling blood or biochemistry rechecks and revisits.

How much do the tests and treatment usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

Disease Guide

Illegal & Club Drug Poisoning in Dogs and Cats: Symptoms, Diagnosis & Emergency Care [2025]

Illegal drug poisoning can cause abnormal heart rate, seizures, and changes in body temperature. Ingestion of cannabis products is most common. Emergency supportive care with vital sign monitoring is required; prognosis is generally good.

Take 1 minute to check the symptoms first

Last updated: 2026/01/05

Pethealthmap Editorial Team

Sources: ASPCA, AVMA, Taiwan Veterinary Internal Medicine Association

When to See a Vet

Seek immediate emergency care

•Frequent or repeated seizures occurring continuously
•Complete loss of responsiveness or sustained deep coma
•Rapid breathing or obvious signs of respiratory distress

Schedule a clinic visit soon (within 24–72 hours)

•Persistent vomiting or excessive drooling lasting several hours
•Gums noticeably pale or turning purple
•Clearly unsteady gait or persistent limping lasting more than one day

01What symptoms indicate something is wrong?

Exposure to illegal or club drugs can cause rapid behavioural and physical changes in dogs and cats. The symptoms below may indicate suspected poisoning — monitor closely and seek veterinary evaluation as soon as possible.

Lethargy, slowed responses, or unusual drowsiness
Weakness, significantly reduced activity, or reluctance to move
Faster or slower heart rate, or irregular heart rhythm (to be confirmed by a vet)
Seizures, intermittent convulsions, or muscle tremors
Unsteady gait, frequent stumbling, or poor coordination
Possible vomiting, excessive drooling, or abnormal elimination

Seek emergency care immediately if you notice the following symptoms:

⚠️ Continuous or frequently recurring seizures
⚠️ Coma or complete unresponsiveness that cannot be roused
⚠️ Rapid breathing or obvious difficulty breathing
⚠️ Purple or white gums, indicating abnormal circulation or blood oxygenation

02How do I assess the situation at home? Key observations and when to go to the emergency vet

Key information you can record at home helps the vet make a rapid assessment — document as much detail as possible and bring it to the clinic or emergency hospital.

Note the time symptoms first appeared and the sequence of changes
Use your phone to video any abnormal behaviour, gait, or full seizure episodes
Track and record changes in water intake and appetite over time
Record the frequency, colour, and character of vomiting, diarrhoea, and urination
Retain or photograph any suspected toxin packaging, residue, or scene evidence
If poisoning is suspected, contact your veterinary hospital early and arrange a visit promptly

03How will the vet diagnose this? Common tests and procedures

On arrival, the vet will prioritise a thorough assessment and, based on findings, may order blood, biochemistry, and imaging tests to evaluate organ function and the extent of toxicity.

Full physical examination

assess neurological status, body temperature, and cardiopulmonary function

Complete blood count (CBC)

check for anaemia, white blood cell changes, or signs of infection or inflammation

Biochemistry panel

evaluate liver, kidney, and electrolyte function

Urinalysis

assess metabolic and excretory function, or detect abnormal metabolites

X-ray or ultrasound

evaluate thoracic and abdominal status and possible foreign bodies

Advanced imaging (CT/MRI)

assess the brain or complex lesions when necessary

Toxicology sampling and specialist referral if required

04How is this treated and managed after diagnosis? Medications, diet, and home care

After treatment, follow-up tests and home care as directed by your vet are essential. Monitor alertness, eating, and elimination continuously to track recovery progress.

Schedule follow-up visits and blood or biochemistry recheck tests as directed by your vet
Monitor alertness, heart rate, and urine output at home
Provide supportive care and adequate rest as instructed by the hospital
Reintroduce food gradually; avoid suddenly offering large quantities or stimulating foods
Return promptly if symptoms worsen or do not improve, or seek specialist evaluation

05What should I prepare before the vet visit? Key information to help your vet identify the cause quickly

Compile the timeline of onset, how symptoms progressed, and when the suspected exposure occurred

Bring any suspected toxin packaging, residue, or clear photographs as evidence

Prepare a recent food, outing, and contact history, including exposure to other animals

List all current medications, supplements, and dosages (if applicable)

Bring video footage and a record of elimination frequency to help the vet assess the pattern

Consider calling ahead to a hospital with toxicology testing and poisoning management experience

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.