As a veterinarian with extensive experience in animal health, I can provide you with information on the potential side effects of Heartgard, which is a popular canine heartworm preventative medication. It's important to note that while Heartgard is generally safe for dogs, some pets may experience side effects. Here's a detailed list of possible side effects: 1. Depression/Lethargy: Some dogs may become less active or show signs of depression after taking Heartgard. 2. Vomiting: Gastrointestinal upset can occur, leading to vomiting in some cases. 3. Anorexia: A reduced appetite can be a side effect, where the dog loses interest in food. 4. Diarrhea: Loose or watery stools can be a sign of an upset stomach. 5. Dilation of the pupils: This is a less common side effect where the dog's pupils may become larger than normal. 6. Staggering: Some dogs may have difficulty walking or show signs of unsteadiness. 7. Convulsions: In rare cases, seizures can occur as a severe reaction to the medication. 8. Drooling: Excessive salivation can be another side effect. It's crucial to consult with a veterinarian if your dog experiences any of these side effects, as they can advise on the best course of action. Some side effects may be temporary and resolve on their own, while others may require medical attention. read more >>

Heartgard? may result in these side effects:Depression/lethargy.Vomiting.Anorexia.Diarrhea.Dilation of the pupils.Staggering.Convulsions.Drooling.read more >>