Simparica Trio is a monthly chewable for medium dogs weighing 10.1–20kg that covers fleas, ticks, intestinal worms and heartworm in a single tablet. It's aimed at adult dogs and sold in six-month packs, giving one dose per month across the year.

The chew combines three active ingredients: sarolaner for fleas and ticks (including paralysis ticks), moxidectin for heartworm prevention, and pyrantel for roundworm and hookworm. Fleas start dying within hours of dosing, and the tablet is flavoured so most dogs take it like a treat rather than needing to be pilled. One monthly dose replaces separate spot-ons, heartworm tablets and worming chews.

Owners choose Simparica Trio when they want the simplest possible parasite routine — one chew, one date on the calendar, everything covered. It's a common vet recommendation for households in tick-prone areas where paralysis tick cover matters year-round.