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Side Effects of CBD For Dogs

While many dogs can safely benefit from CBD, it’s essential to understand its effects, possible side effects, and how to use it responsibly. This guide addresses common questions about CBD, offering insights into how it interacts with dogs, the importance of proper dosage, and what to watch for when introducing this supplement into your pet’s routine.

Side effects of CBD for dogs

Key Takeaways

  • CBD may cause side effects in dogs, such as dry mouth, drowsiness, and lethargy, especially if not dosed properly.
  • Accurate dosage and administration are crucial to reducing the risk of adverse reactions and ensuring safe use.
  • Caution is necessary when using CBD in dogs with pre-existing conditions or if they are on other medications, as interactions may occur.
  • Evaluating the quality and safety of CBD products for pets is essential; always choose reputable, third-party tested options.
  • Close monitoring of your dog for any signs of adverse reactions is important when introducing CBD into their routine.

What is CBD and How Does it Affect Dogs?

Cannabidiol (CBD) is a compound derived from the cannabis plant that has gained significant attention for its potential therapeutic benefits. While much is known about CBD’s effects on humans, its impact on dogs is still being researched. A key to understanding CBD’s benefits and potential side effects in dogs lies in how it interacts with their endocannabinoid system.

Understanding Cannabidiol (CBD)

CBD is a non-psychoactive compound, meaning it doesn’t cause the “high” associated with THC. Instead, it interacts with the body’s endocannabinoid system, a vital system responsible for maintaining balance (homeostasis) and regulating several physiological functions, including mood, pain response, and immune function.

The Endocannabinoid System in Dogs

Like humans, dogs have an endocannabinoid system (ECS) that helps regulate crucial functions such as pain perception, mood, appetite, and immune response. When CBD is administered to dogs, it interacts with this system, potentially offering therapeutic benefits by helping to alleviate anxiety, reduce pain, and improve overall well-being.

While the exact mechanisms by which CBD affects dogs are still under investigation, early research suggests that CBD may influence endocannabinoid receptors and other neurotransmitter systems. This interaction points to CBD as a promising natural option for supporting canine health, particularly in areas like anxiety relief, pain management, and improved quality of life.

Side Effects of CBD For Dogs

As with anything taken too much, CBD can have side effects too. However, it is important to know that this can only be experienced by the dog if you give them too much of it. With proper administration, this may be avoidable.

1. Thirstiness

One of the most common side effects of CBD in dogs is increased thirst, even in cooler indoor environments. This side effect is similar to what some humans experience with CBD. However, it is easily manageable by ensuring your dog has constant access to fresh water. Without enough hydration, your dog may start drooling as a sign of dehydration, so keeping water available is essential.

2. Allergic reactions

To preserve effectiveness, CBD is typically mixed with carrier oils like MCT or coconut oil, and may also include other medicinal ingredients such as rosemary or black pepper. While dogs may not be allergic to CBD itself, they could have reactions to these additional ingredients.

3. Lethargy / Sleeping more

One common reason for using CBD in dogs is to relieve chronic pain. Once the pain subsides, dogs often become more relaxed and calm, which is why they may appear very sleepy when first taking CBD. Their body may need time to adjust initially, but with regular use, this drowsiness typically decreases.

4. Low blood pressure

CBD should not be given to dogs in doses higher than recommended. Overdosing can cause a sudden drop in blood pressure, leading to temporary disorientation and nausea. While not life-threatening, your dog may feel dizzy and have reduced energy for a short period.

5. Upset Stomach

CBD is often given in oil form, which takes longer for a dog’s stomach to process. Too much CBD can irritate their stomach and cause vomiting, especially with lower-quality products that contain inferior ingredients. To avoid digestive issues, choose high-quality CBD. For recommendations, check our guide to the best CBD dog treats in Canada.

How to avoid side effects of CBD with your dog

To minimize potential side effects, it’s crucial to follow the product manufacturer’s instructions carefully. CBD products can differ significantly in formulation, with variations in potency and the inclusion of additional ingredients designed to enhance their effects. Some products may contain higher concentrations of CBD, while others might incorporate natural additives that aim to provide complementary benefits.

To ensure your dog’s safety and comfort, it’s advisable to start with a smaller dose and closely monitor your dog’s reaction. Observing how your dog responds to the initial dosage can provide valuable insights into their tolerance and help you determine if an adjustment is necessary. Gradually increasing the dosage, if needed, can help you find the optimal amount that effectively addresses your dog’s needs while minimizing the risk of side effects. Always consult with your veterinarian if you have any concerns or questions about dosing.

Choosing a Reputable CBD Product

When choosing a CBD product for your dog, consider several key factors:

  • Third-Party Lab Testing: Ensure the product has undergone rigorous third-party laboratory testing. This verifies the purity, potency, and safety of the CBD and other ingredients.
  • Ingredient Quality: Choose CBD products with high-quality, organic, and non-GMO ingredients. This includes the hemp source used for extraction.
  • Certification and Transparency: Opt for brands that are transparent about their manufacturing processes and extraction methods. Look for relevant certifications, such as USDA organic or Good Manufacturing Practices (GMP).
  • Dosage and Administration Guidelines: Review the product’s dosage recommendations and instructions. This ensures you administer the correct amount for your dog’s size and needs.

Signs of an Adverse Reaction

While CBD is generally safe for dogs when given appropriately, it’s important to be mindful of potential side effects and watch for signs of an adverse reaction. Close monitoring of your dog is essential to ensure their well-being when using CBD products.

Common signs of CBD overdose in dogs may include:

  • Excessive drowsiness or lethargy
  • Dry mouth and increased thirst
  • Gastrointestinal issues, such as vomiting or diarrhea
  • Lack of coordination or ataxia
  • Tremors or, in rare cases, seizures


If you notice any of these symptoms, discontinue use and consult your veterinarian immediately.

FAQ: Side Effects of CBD for Dogs

What is CBD, and how does it affect dogs?

CBD, or cannabidiol, is a compound derived from the hemp plant that offers potential therapeutic benefits for dogs. It interacts with the endocannabinoid system, which plays a key role in regulating various functions, including pain relief, inflammation reduction, and anxiety management.

Common side effects of CBD in dogs may include dry mouth, increased thirst, drowsiness, and lethargy. These effects are typically mild and may diminish over time or with dosage adjustments.

The appropriate CBD dosage for dogs varies based on factors such as size, age, and overall health. It’s advisable to start with a low dose and gradually increase it while monitoring your dog’s response. Always adhere to the product instructions and consult your veterinarian for tailored dosage recommendations.

While CBD is generally considered safe for most dogs, individual responses can vary. Dogs with specific health conditions, pregnant or nursing dogs, or those on certain medications may not be suitable candidates for CBD. Always consult your veterinarian before starting any new supplement.

The onset of CBD effects can vary, but many dogs may begin to feel the effects within 30 minutes to 2 hours after administration. Factors such as the dog’s metabolism, the form of CBD used, and the dosage can influence how quickly it takes effect.