In well - controlled laboratory studies, Simparica provided consistent flea kill from 99.8 % to 100 % through day 35, almost eliminating fleas within 24 hours of dosing or re-infestation for the entire month.2 And ticks didn't fare much better — Simparica's
tick protection remained strong through day 35 with 96.9 % to 100 % tick kill throughout the entire study period.3 - 6