CBD has a better safety record in dogs than aspirin or ibuprofen, both of which vets explicitly warn against giving to dogs. So when someone asks “is CBD safe for my pet?” the answer depends entirely on what you’re comparing it to. The real risks with pet CBD products are not the CBD; they’re product quality, drug interactions, and THC content. Get those three things right and you’re working with one of the better-studied natural compounds in veterinary wellness research.
🧪 Lab Tested | 👩💼 Woman-Owned | 🏆 Est. 2017
This guide is for educational purposes only. Consult your veterinarian before starting CBD for your pet, particularly if your pet takes any medication. This is not a substitute for professional veterinary advice.
What the Research Says About CBD Safety in Pets
The most cited clinical study on CBD in dogs is a 2018 trial from Cornell University’s College of Veterinary Medicine, which gave dogs with osteoarthritis 2mg of CBD per kilogram of body weight twice daily for four weeks. No adverse effects were observed. Liver enzyme (ALP) levels rose in some dogs but returned to baseline after the study ended, with no clinical symptoms. Pain scores and mobility improved significantly.
Gamble, L. et al. (2018). “Pharmacokinetics, Safety, and Clinical Efficacy of Cannabidiol Treatment in Osteoarthritic Dogs.” Frontiers in Veterinary Science, 5, 165. PubMed: 30083539.
A 2019 Colorado State University study on CBD and canine epilepsy found that 89% of dogs in the CBD group had a reduction in seizure frequency, again with no serious adverse effects at the studied dose. The most common finding across pet CBD research is liver enzyme (ALP) elevation, which is worth monitoring with your vet but does not indicate organ damage in the studies conducted.
McGrath, S. et al. (2019). “Randomized blinded controlled clinical trial to assess the effect of oral cannabidiol administration in addition to conventional antiepileptic treatment on seizure frequency in dogs with intractable idiopathic epilepsy.” Journal of the American Veterinary Medical Association, 254(11), 1301-1308. PubMed: 31067185.
The WHO’s 2019 pre-review report on cannabidiol concluded that CBD is generally well tolerated in animals and does not appear to have abuse potential, toxicity at therapeutic doses, or withdrawal effects. No human or animal deaths from CBD alone have been reported in the scientific literature.
Known Side Effects
CBD’s side effects in dogs are dose-dependent and generally mild. Most resolve by reducing the dose. None require emergency care on their own (THC toxicity is different; that’s covered below).
| Side effect | How common | What it looks like | What to do |
| Sedation or lethargy | Most common | More sleepy than usual; slower to respond | Reduce dose by 25 to 50%. Sedation at a lower dose is still calming without the excess. |
| Dry mouth / increased thirst | Common | Drinking more water than usual | Ensure fresh water is available. Usually resolves on its own. |
| Brief blood pressure drop | Less common | Momentary lightheadedness when standing; brief unsteadiness | Passes within minutes. If persistent, reduce dose and consult vet. |
| Mild GI upset | Uncommon | Loose stool or brief nausea, usually within first few doses | Give with food. Often resolves within a few days as the dog adjusts. |
| Liver enzyme elevation (ALP) | Observed in studies | No clinical symptoms; detected only via blood panel | Baseline and periodic bloodwork recommended for dogs on long-term CBD. Consult your vet. |
ALP elevation is not the same as liver damage. The liver enzyme finding is the most discussed one in veterinary CBD research, and the distinction matters. It’s an enzyme marker that can rise in response to many compounds, including steroids, phenobarbital, and other commonly used veterinary medications. The Cornell study observed the elevation but found no clinical pathology or tissue damage. Ongoing bloodwork monitoring is a reasonable precaution for dogs on long-term CBD, particularly at higher doses.
Drug Interactions: The CYP450 Issue
CBD affects the CYP450 enzyme system in the liver, which metabolizes a wide range of pharmaceuticals. If you’ve ever been told to avoid grapefruit with certain medications, the mechanism is similar: CBD competes with those drugs for the same metabolic enzymes, which can slow their processing and raise their blood levels.
This doesn’t make CBD dangerous by default. It means that dogs on certain medications may need dose adjustments to those medications when CBD is added. A vet who knows your dog’s full medication list can assess the interaction risk and monitor accordingly.
Medications that interact with CBD via CYP450
- Phenobarbital: used for seizure management; CBD may raise blood levels and increase sedation risk
- Cyclosporine: immunosuppressant used post-surgery and for autoimmune conditions
- NSAIDs: carprofen, meloxicam, and others used for pain and inflammation
- Corticosteroids: prednisone and related drugs for inflammation and immune conditions
- Antiparasitic medications: some flea and tick preventives are metabolized via CYP450
- Thyroid medications: levothyroxine and similar drugs
It’s not a veto on CBD; it’s information that allows a vet to monitor drug levels appropriately. Vets who work with CBD-using patients often run baseline bloodwork and periodic panels on dogs taking concurrent medications.
What Vets Actually Say
The veterinary profession’s relationship with CBD is best described as cautiously evolving. The American Veterinary Medical Association (AVMA) does not endorse CBD products for animals and notes that more research is needed, a position consistent with its approach to most natural compounds without FDA approval. At the same time, the AVMA has acknowledged the growing body of veterinary research and supports further study.
In practice, the picture is more complex than official positions suggest. A 2020 survey published in Frontiers in Veterinary Science found that a majority of veterinarians reported client-initiated discussions about CBD and that most considered it “somewhat safe” or “very safe” at appropriate doses. In California, legislation passed in 2023 explicitly allows veterinarians to discuss cannabis products with clients.
Kogan, L. et al. (2020). “Veterinarians’ knowledge, experience, and perception regarding the use of cannabidiol for dogs.” Canadian Veterinary Journal, 61(7), 731-738. PubMed: 32624594.
The vets most comfortable recommending CBD tend to share two practices: they insist on pet-specific products with third-party testing, and they run bloodwork at baseline and periodically thereafter. “they both have positive reactions and seem calmer,” Kayla A.
THC: The Actual Danger
THC is toxic to dogs and cats
Dogs have a high concentration of CB1 receptors in the cerebellum. THC binds directly to these receptors and causes toxicity at doses that would only mildly affect a human. Symptoms of THC toxicity in dogs include ataxia (loss of coordination), urinary incontinence, tremors, slow heart rate, vomiting, and in severe cases, coma. Cats are similarly sensitive. Never give a pet any product containing Delta-8 THC, Delta-9 THC, THCa, or HHC. If your pet ingests a THC product, contact a veterinarian or ASPCA Animal Poison Control (888-426-4435) immediately.
THC toxicity is the most common cannabis-related emergency presenting to veterinary clinics, and in virtually every case the culprit is an edible or concentrate formulated for humans, not a pet product. The reason CBD safety discussions exist separately from THC discussions is precisely this: CBD and THC have entirely different interaction profiles with the canine endocannabinoid system. CBD’s interaction is indirect and generally well tolerated; THC’s is direct and dose-dependent in a way that overwhelms a dog’s CB1 receptor density.
A pet-specific CBD product with COA-confirmed non-detectable THC is not in the same risk category as a human edible.
How to Choose a Safe Pet CBD Product
The safety of a pet CBD product comes down to what’s in it and how it’s tested. CBD itself is the lower-risk ingredient. The higher-risk elements are THC content, carrier oils and added botanicals, and product concentration.
What to verify on a pet CBD product’s COA
- Non-detectable Delta-9 THC. The COA should show Delta-9 THC at “ND” (non-detectable) or below 0.01%. Not just “below 0.3%”. Non-detectable. Small dogs are sensitive enough that even trace THC can cause distress at higher doses.
- CBD potency matches the label. The mg per mL on the COA should match the label claim. If a product claims 10mg/mL and the COA shows 6mg/mL, you’re underdosing and overpaying.
- No pesticides or heavy metals. A full-panel COA tests for pesticide residues and heavy metals. These matter more for pets than for humans given the smaller body mass and higher sensitivity.
- Third-party testing. The testing lab should be independent of the manufacturer. In-house testing is not independently verifiable.
- Pet-safe carrier. Check the base oil. MCT oil is generally safe for dogs; some carriers, essential oils, and botanical additives are not. Wild salmon oil is both safe and provides omega-3 benefit.
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Browse at tribetokes.com/cbd-for-pets. COAs at tribetokes.com/certificates-of-analysis. For dosing guidance, see our weight-based CBD dosage guide for dogs.
Frequently Asked Questions
CBD has a well-documented safety profile in dogs at appropriate doses. Two major veterinary studies (a 2018 Cornell trial on osteoarthritis and a 2019 Colorado State epilepsy study) found no serious adverse effects at the studied doses. The most common side effects are dose-dependent and mild: sedation, increased thirst, and in some dogs a temporary drop in blood pressure. A liver enzyme (ALP) elevation was observed in studies but did not correspond to clinical pathology. The primary risks are product quality (THC content, untested ingredients) and drug interactions, not CBD itself.
CBD at appropriate doses from a pet-specific product with COA-confirmed non-detectable THC does not carry significant harm risk for most healthy dogs. The documented risks are mild and dose-dependent: excessive sedation at too high a dose, GI upset in the first few days, and potential liver enzyme elevation with long-term use. Serious harm most commonly results from giving a dog a product containing THC (toxic to dogs), using an incorrect dose, or giving a human product with ingredients not safe for pets. If your dog takes prescription medications, a vet consultation before starting is particularly important due to CYP450 enzyme interactions.
The most common side effects are sedation or lethargy (dose-dependent), increased thirst, and occasional mild GI upset in the first few days. Less commonly, dogs may show a brief drop in blood pressure immediately after dosing, visible as momentary unsteadiness when standing. Liver enzyme (ALP) elevation has been observed in studies on long-term CBD use; it doesn’t indicate organ damage but is worth monitoring via periodic bloodwork for dogs on extended CBD regimens. All side effects documented to date resolve with dose reduction or discontinuation.
Yes, potentially. CBD inhibits CYP450 enzymes in the liver that metabolize many common pharmaceuticals, including phenobarbital, cyclosporine, NSAIDs, and corticosteroids. The interaction can slow the processing of those drugs and raise their blood levels, which may require dosage adjustments. This is the same mechanism as grapefruit’s interactions with human medications. It doesn’t make CBD off-limits for medicated dogs, but it does make veterinary consultation before starting CBD important. Vets who work with CBD-using patients typically monitor drug levels and run periodic bloodwork.
Veterinary opinion is cautiously supportive but varies. The AVMA does not formally endorse pet CBD products and calls for more research, a position consistent with its approach to most natural compounds without FDA approval. In surveys, most vets describe CBD as “somewhat safe” or “very safe” at appropriate doses and report growing client demand for CBD information. Vets most supportive of CBD use tend to require pet-specific products with third-party testing and recommend baseline bloodwork. California legislation now explicitly allows vets to discuss cannabis products with clients, reflecting broader professional acceptance.
CBD is generally considered safe for cats when using a pet-specific product with confirmed non-detectable THC and no added essential oils or terpenes. Cats are considerably more sensitive than dogs to plant compounds because they lack certain liver enzymes (glucuronyl transferase) that metabolize many botanicals. This sensitivity makes product formulation more critical for cats than for dogs: any added botanical ingredient that’s safe for dogs or humans may still be problematic for a cat. Dose cats at the low end of the weight range and consult a vet before starting, particularly if the cat takes any medication.
CBD and THC have fundamentally different safety profiles in pets. CBD is non-psychoactive and does not bind directly to CB1 receptors. Its side effects are mild and dose-dependent. THC binds directly and powerfully to CB1 receptors, of which dogs have an unusually high concentration; at doses that would only mildly affect a human, this overwhelms the canine system. THC toxicity in dogs presents as ataxia, tremors, vomiting, and in severe cases, coma. CBD products with COA-confirmed non-detectable THC do not carry this risk.
Check the COA before buying. A safe pet CBD product will show non-detectable Delta-9 THC (not just “below 0.3%”), CBD potency that matches the label, and full-panel testing for pesticides and heavy metals. The testing should be third-party, not conducted by the manufacturer. The carrier base should be safe for pets: wild salmon oil, hemp seed oil, and MCT oil are acceptable; many essential oils and botanical additives are not. Avoid human CBD products; they may contain terpenes or other additives that are safe for people but risky for smaller animals with different metabolic pathways.
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300mg CBD. Wild salmon oil base. Non-detectable THC confirmed. No added terpenes, no essential oils. 5.00/5 from 16 verified pet product reviews.
