Is it Safe to Use Expired Heartworm Meds for My Dog?

- Expired medications may not be effective. The active ingredients in heartworm meds can lose their potency over time, making them less effective at preventing or treating heartworms.

- Expired medications may be harmful. The inactive ingredients in heartworm meds can break down over time and become toxic to your dog.

- Using expired medications can lead to drug resistance. If your dog takes expired heartworm meds that are not effective, the heartworms may become resistant to the medication, making it more difficult to treat them in the future.

If you have any expired heartworm meds, dispose of them safely according to the instructions on the label and purchase a new supply from your veterinarian. Never give your dog expired medication, even if you think it is still good.