Sarolaner started killing fleas within 3–4 h and lasted for more than a month.
Sarolaner provided ≥98% control of fleas by 8 h for 28 days.
A single treatment completely stopped flea egg laying for 35 days.
In an infested environment model, >95% control of fleas was attained by 2 weeks and 100% efficacy was achieved after two monthly doses.