Long-Term CBD Use in Dogs: What 3 Years of Research Shows

ABSC Organics Team |
March 4, 2026 |
Reading Time: 9 minutes

The initial question most pet owners ask about CBD is straightforward: does it work? But once they see the difference CBD makes in their dog’s comfort, mobility, or anxiety levels, a more nuanced question emerges: is it safe to keep using CBD long-term?

It is a critical question. Conditions like osteoarthritis, chronic anxiety, and age-related pain are not temporary. They require ongoing management, which means the CBD your dog starts at age seven might still be part of their daily routine at age twelve or beyond. Understanding what long term cbd use dogs experience, both in terms of safety and sustained efficacy, is essential for making responsible decisions about your pet’s health.

In this article, we draw on three years of clinical research at Colorado State University, the broader published veterinary literature, and the real-world data from thousands of pet owners to provide the most comprehensive assessment of long-term CBD safety and efficacy currently available.

The State of Long-Term CBD Research in Dogs

Why Long-Term Data Matters

Most pharmaceutical drugs approved for veterinary use undergo extended safety studies before receiving FDA approval. These studies evaluate not just whether a drug works, but whether it continues to work over time and whether chronic use introduces risks that short-term studies would miss.

CBD has not gone through the FDA approval process for veterinary use, which means the traditional regulatory pathway for generating long-term safety data does not apply. Instead, our understanding of long-term CBD safety comes from three sources:

1. University clinical trials: Controlled studies at institutions like Colorado State University that track subjects over weeks to months.
2. Published veterinary case series: Documented cases of dogs using CBD over extended periods, reported in veterinary journals.
3. Real-world observational data: The collective experience of thousands of pet owners who have maintained their dogs on CBD for years and reported outcomes.

None of these sources alone provides a complete picture. Together, they give us the best available understanding of what happens when dogs use CBD over the long haul.

Colorado State University: Three Clinical Trials

ABSC Organics has supported three clinical trials at Colorado State University, and the cumulative data from these studies provides some of the most rigorous information available on CBD use in dogs.

While individual study durations have varied, the collective body of CSU research now spans approximately three years of data collection, including follow-up assessments of study subjects. Key long-term findings include:

Safety Profile Over Extended Use

• No serious adverse events: Across all three trials, dogs receiving CBD at recommended doses did not experience serious adverse effects. No organ damage, no neurological complications, no significant metabolic disruption.
• Stable blood chemistry: Comprehensive blood panels (complete blood count, serum chemistry) showed that the vast majority of values remained within normal reference ranges throughout the study periods.
• Liver enzyme monitoring: Mild, clinically insignificant elevations in alkaline phosphatase (ALP) were observed in some dogs. This is the most commonly noted laboratory finding across all published veterinary CBD studies. Importantly, these ALP elevations did not correspond to liver damage or dysfunction, as confirmed by concurrent evaluation of other liver markers (ALT, GGT, bilirubin).
• No tolerance development: Dogs did not require progressively higher doses to achieve the same therapeutic effect over the study periods. This is significant because tolerance, where the body becomes desensitized to a substance and requires escalating doses, is a common concern with long-term use of any bioactive compound.

Sustained Efficacy

• Consistent pain reduction: Dogs with osteoarthritis that responded to CBD in the early weeks of the studies maintained their improvement throughout the treatment periods without dose escalation.
• Stable seizure reduction: In the epilepsy studies, dogs that experienced reduced seizure frequency continued to benefit throughout the study duration.
• No rebound effects: When CBD was discontinued at the end of study periods, dogs did not experience a worsening of symptoms beyond their pre-treatment baseline, suggesting that CBD does not create dependence or withdrawal effects.

Understanding the ALP Question

Because alkaline phosphatase elevation is the most commonly discussed finding in CBD safety studies, it deserves thorough explanation.

What Is ALP?

Alkaline phosphatase is an enzyme found in several tissues, including the liver, bones, intestines, and kidneys. Elevated ALP on a blood panel can indicate liver disease, bone disease, certain endocrine disorders, or simply be a normal variant in certain breeds (notably, young growing dogs and some breeds like Scottish Terriers naturally run higher).

What CBD-Related ALP Elevations Mean

The ALP elevations observed in CBD studies have been:

• Mild: Typically 1.5 to 3 times the upper reference limit, compared to the 5 to 10 times elevations seen in actual liver disease.
• Isolated: Other liver enzymes (ALT, GGT) remained normal, and there was no evidence of liver inflammation or damage on histopathology when evaluated.
• Mechanism understood: CBD is metabolized by the cytochrome P450 enzyme system in the liver. The mild ALP elevation likely reflects increased hepatic enzyme activity related to CBD metabolism, not liver damage. This is similar to how certain prescription drugs (such as corticosteroids and phenobarbital) elevate ALP without causing liver disease.
• Clinically insignificant: The veterinary researchers involved in the CSU trials have consistently characterized these elevations as clinically not significant, meaning they did not warrant treatment, dose reduction, or discontinuation of CBD.

What This Means for Long-Term Users

If your dog is on long-term CBD, periodic blood work (every 6 to 12 months) is a prudent precaution. Your veterinarian can monitor ALP alongside other liver values to ensure everything remains in the expected range. If your dog is also taking medications metabolized by the liver, more frequent monitoring (every 3 to 6 months) may be appropriate.

This is good practice for any dog on long-term supplementation or medication, not a specific concern unique to CBD.

What Three Years of Real-World Use Tells Us

Since ABSC Organics has been available to pet owners for several years, we have a substantial body of real-world, long-term usage data. Among the 740+ reviews on our website and the feedback we receive from repeat customers, clear patterns have emerged.

Sustained Benefits Without Dose Escalation

One of the most encouraging patterns is that the majority of long-term users report maintaining the same dose over months and years without needing to increase it. This aligns with the clinical trial finding of no tolerance development and suggests that CBD’s mechanism of action, working with the endocannabinoid system rather than overwhelming a receptor, is fundamentally different from drugs that produce tolerance.

“We have been using ABSC CBD oil for our arthritic German Shepherd for over two years now. Same dose, same results. He still gets up from his bed without groaning, still takes his morning walk, still plays with our younger dog. I was worried the effect would wear off, but it has not.”

Improved Quality of Life in Senior Dogs

Long-term CBD users frequently describe not just symptom management, but a broader improvement in their dog’s quality of life. This includes better appetite, more engagement with family activities, improved sleep, and a general return to behaviors the dog had abandoned due to pain or discomfort.

“Our 14-year-old Lab mix has been on ABSC CBD for three years. She started because of arthritis, but the benefits go beyond her joints. She sleeps better, she is more alert during the day, and she seems happier overall. Our vet calls her the poster dog for aging well.”

Successful Medication Reduction

A subset of long-term users report that, in consultation with their veterinarian, they were able to reduce the dose of conventional medications (particularly NSAIDs and anti-anxiety drugs) after establishing CBD as part of the treatment regimen. This is not a guaranteed outcome, and it should never be attempted without veterinary supervision, but it reflects a potential benefit of long-term CBD use for dogs on chronic pharmaceutical therapy.

Potential Concerns with Long-Term CBD Use

No supplement or medication is without considerations when used over extended periods. Here is an honest assessment of the potential concerns associated with long term cbd use dogs may experience.

Liver Metabolism Load

As discussed above, CBD is metabolized by liver enzymes. For dogs with pre-existing liver conditions or those taking multiple medications processed by the same enzyme pathways, long-term CBD use adds to the metabolic workload on the liver. Regular blood work mitigates this concern by catching any emerging issues early.

Drug Interactions Over Time

If your dog’s medication regimen changes over the years they are on CBD, new drug interactions may arise. Always inform your veterinarian that your dog is taking CBD whenever a new medication is prescribed. Key interactions to be aware of include:

• Anti-seizure medications: CBD can affect serum levels of phenobarbital, zonisamide, and other anticonvulsants.
• NSAIDs: Long-term concurrent use of CBD and NSAIDs may affect liver enzyme levels.
• Sedatives: CBD’s calming effects may compound sedation from other drugs.
• Immunosuppressants: CBD may alter the metabolism of drugs like cyclosporine.

Contaminant Accumulation

This is perhaps the most underappreciated concern with long-term CBD use, and it has nothing to do with CBD itself. If a CBD product contains trace amounts of heavy metals, pesticides, or other contaminants, daily use over months and years allows those contaminants to accumulate in your dog’s tissues.

This is precisely why USDA Organic certification is not just a marketing differentiator but a health imperative for long-term users. Organic cultivation and processing standards minimize contaminant exposure at the source, so there is less to accumulate over time. Every batch of ABSC Organics CBD oil is third-party tested for heavy metals, pesticides, and other contaminants, providing an additional layer of assurance.

Age-Related Changes in Metabolism

As dogs age, their liver and kidney function naturally decline. A CBD dose that was well tolerated at age seven may need adjustment at age twelve. This is not unique to CBD; it applies to virtually every medication and supplement a senior dog takes. Work with your veterinarian to monitor organ function and adjust dosing as your dog ages.

Best Practices for Long-Term CBD Administration

Based on the clinical trial data, published research, and real-world experience, here are the best practices for dogs on long-term CBD:

1. Start with a Veterinary Baseline

Before starting CBD, get a comprehensive blood panel (CBC, serum chemistry, urinalysis). This provides baseline values for liver enzymes, kidney function, and other parameters that you can compare against future results.

2. Use a Consistent, High-Quality Product

Switching between CBD brands introduces variables that make it harder to evaluate safety and efficacy. Choose a product that meets the highest quality standards and stick with it. The ABSC Organics product line offers four concentrations to accommodate changing needs without changing brands:

• 300mg ($49.99) for small dogs and cats
• 600mg ($59.99) for medium dogs
• 1200mg ($119.99) for large dogs
• 2400mg ($199.99) for giant breeds or multi-pet households

3. Schedule Regular Veterinary Check-Ups

For dogs on long-term CBD:

• Healthy dogs under 7: Annual blood work is typically sufficient.
• Senior dogs (7+): Every 6 months is advisable.
• Dogs on concurrent medications: Every 3 to 6 months, or as recommended by your veterinarian.

4. Keep a Long-Term Health Journal

Tracking your dog’s symptoms, behavior, and any changes over months and years provides invaluable data for both you and your veterinarian. Note:

• CBD dose and frequency
• Mobility and activity levels
• Appetite and weight
• Behavioral changes (positive and negative)
• Any concurrent medications and dosing changes
• Blood work results

5. Adjust Proactively, Not Reactively

Do not wait for problems to emerge before adjusting. As your dog ages, their needs change. A proactive approach, gradually adjusting the CBD dose in response to changing mobility, weight, or activity levels, produces better long-term outcomes than waiting for a crisis.

6. Prioritize Product Quality for the Long Haul

When you are giving your dog a supplement every single day for years, the quality of that supplement compounds. Small differences in purity, contaminant levels, and potency accuracy become large differences over thousands of doses. This is the strongest argument for choosing a USDA Organic, third-party tested, clinically researched product like ABSC Organics.

What Happens When You Stop CBD After Long-Term Use?

This is a question that concerns many pet owners, and the clinical data provides a reassuring answer.

No Withdrawal Effects

CBD is not addictive and does not produce physical dependence. When dogs in the CSU clinical trials were taken off CBD at the end of study periods, they did not exhibit withdrawal symptoms such as increased anxiety, restlessness, tremors, or loss of appetite.

Gradual Return of Symptoms

What typically happens is that the symptoms CBD was managing, whether pain, anxiety, or inflammation, gradually return over days to weeks after discontinuation. This is not a rebound effect (where symptoms return worse than before); it is simply the absence of the therapeutic effect that CBD was providing.

If you need to discontinue CBD for any reason (surgery, diagnostic testing, medication change), a gradual taper over one to two weeks is preferable to abrupt cessation, primarily for your dog’s comfort rather than for any pharmacological necessity.

The Future of Long-Term CBD Research

The veterinary research community recognizes the need for even longer-duration safety studies. Several initiatives are currently underway or planned:

• Multi-year prospective studies: These will track dogs on CBD from the start of therapy through several years, providing definitive long-term safety data.
• Breed-specific research: Different breeds metabolize compounds differently. Future studies may identify breed-specific dosing guidelines and safety considerations.
• Geriatric-focused trials: Research specifically examining CBD safety and efficacy in senior dogs, the population most likely to use CBD long-term, is a priority.
• Combination therapy studies: Rigorous evaluation of long-term CBD use alongside common veterinary medications will help establish evidence-based combination protocols.

ABSC Organics remains committed to supporting this research. Our partnership with Colorado State University has already produced three clinical trials, and we are actively engaged in discussions about future studies that will extend our understanding of long-term CBD use in companion animals.

Making the Decision: Is Long-Term CBD Right for Your Dog?

Based on the available evidence, here is a balanced framework for deciding whether long-term CBD is appropriate for your dog:

Long-term CBD is a reasonable consideration if:

• Your dog has a chronic condition (arthritis, anxiety, allergies) that requires ongoing management.
• Your dog has shown a positive response to CBD during an initial trial period.
• Your veterinarian is aware of and supportive of CBD as part of the treatment plan.
• You are using a high-quality, organic, third-party tested product.
• You are committed to regular veterinary monitoring.

Exercise additional caution if:

• Your dog has known liver disease or significantly compromised liver function.
• Your dog is on multiple medications with potential CBD interactions.
• Your dog is very young (under one year) and has not reached skeletal maturity.
• You are unable to commit to regular veterinary blood work.

In all cases, veterinary guidance is essential. Long-term CBD is not a decision to make in isolation. It is a partnership between you, your veterinarian, and the research that informs both of your decisions.

The Bottom Line

Three years of clinical research at Colorado State University, combined with the published veterinary literature and the real-world experience of thousands of pet owners, paint a consistent picture: long term cbd use dogs experience is characterized by sustained therapeutic benefit, a favorable safety profile, no evidence of tolerance or dependence, and manageable side effects that can be monitored through routine veterinary care.

The key to safe long-term use lies in three factors: choosing a product you can trust to be pure and accurately dosed, maintaining regular veterinary monitoring, and adjusting proactively as your dog’s needs change with age.

For dogs living with chronic pain, ongoing anxiety, or age-related decline, long-term CBD offers something precious: more comfortable days, more engaged years, and a quality of life that their owners can feel good about providing.