8.15% of Dog Reports Mention Hookworm Treatment Failure

Reactions in Dogs: An Analysis of FDA Reports

If you’re reading this, you’ve likely experienced the stress of seeing your dog fall ill. The FDA collects reports of reactions in animals, and the latest data shows that 56,783 reports in 2024 and 54,078 reports in 2025 are related to dogs. One of the most common reactions is the lack of efficacy of treatment for hookworm, which increased from 6.11% in 2024 to 8.15% in 2025, a variation of +2.04 percentage points.

Changes in Common Reactions

Vomiting is another common reaction that was reported 7,918 times in 2024 and 6,980 times in 2025, representing a decrease of -1.03 percentage points. On the other hand, the lack of efficacy of treatment for fleas increased from 6.91% in 2024 to 7.81% in 2025, a variation of +0.9 percentage points. These changes can be important for dog owners who want to better understand the potential reactions of their pets to treatments. For example, if your dog has been treated for hookworm or fleas, it’s essential to monitor their behavior and health closely.

New Reactions Entering the Top 25

In 2025, three new reactions entered the top 25: medication error, with 2,774 reports; overdose, with 1,279 reports; and elevated alanine aminotransferase (ALT), with 1,042 reports. These reactions can be concerning for dog owners, and it’s crucial to be aware of the potential risks associated with treatments. If your dog has experienced any of these reactions, it’s essential to consult with your veterinarian to determine the best course of action. Your veterinarian can help you identify the cause of the reaction and provide guidance on how to prevent it in the future.

Reactions Exiting the Top 25

On the other hand, three reactions that were in the top 25 in 2024 are no longer in the top 25 in 2025: polydipsia, anorexia, and polyuria. Although it’s impossible to determine with certainty why these reactions are no longer in the top 25, it’s possible that dog owners and veterinarians are taking steps to prevent or treat these conditions more effectively. If your dog has experienced any of these reactions in the past, it’s essential to continue working with your veterinarian to ensure they receive the proper care. By maintaining open communication with your veterinarian, you can help your dog receive the best possible care and prevent future reactions.

Keeping a Record of Treatments and Reactions

It’s essential for dog owners to keep a record of their pets’ treatments and reactions. This can help identify patterns and trends, and can be useful for veterinarians when diagnosing and treating conditions. By keeping a detailed record, you can ensure your dog receives the proper care and stay informed about any changes in their health. Remember to consult with your veterinarian if you have any questions or concerns about your dog’s health. Additionally, using a pet care app like PetHub Family can help you keep track of your dog’s treatments, appointments, and health records, making it easier to communicate with your veterinarian and ensure your dog receives the best possible care.