The cheapest way to buy is typically through online pet pharmacies that offer significant "Autoship" discounts for first-time customers. Based on current market prices as of April 2026, most major retailers have a standard Minimum Advertised Price (MAP) set by the manufacturer at $131.79 for a 6-month supply (for medium-sized dogs).
: Comfortis is an Elanco product. You can check the Elanco Rebates Portal for active 2026 offer codes (e.g., INT2026 ) which may offer cash back when purchasing 6 or 12 doses.
: Use tools like GoodRx for Pets to find the current lowest "Buy Online" price and unique pharmacy coupons that can drop prices below standard retail.
To beat this price, look for retailers offering introductory subscription codes: Best Places for Discounts