What Are The Side Effects Of Flea And Tick Medication For Dogs?

What Are The Side Effects Of Flea And Tick Medication For Dogs? Side effects can include skin irritation, agitation or lethargy, vomiting, tremors and seizures. Can flea treatment upset a dog? For toxicity, most flea collars only cause stomach upset such as nausea, vomiting and diarrhea if ingested. However, collars containing Deltamethrin can also cause