Simparica TRIO is a monthly chewable tablet that prevents flea infestations and ticks for three months. This product kills adult fleas and prevents the development of flea eggs and larvae for three months. It also kills ticks for 12 weeks. This product is given once a month to dogs aged between 6 and 24 months. The dosage is one tablet per month. Simparica TRIO also protects against canine heartworm disease, a common and potentially fatal disease in dogs.