Angela from Portland, Mi writes
Liberty 50 Plus IGR Spot-On for Dogs repels and prevents re-infestation of fleas for up to 5 weeks, and ticks for up to 6 weeks. Kills flea eggs and larvae for up to 8 weeks. Kills and repels mosquitoes, lice and mites for up to 4 weeks. You should not reapply any sooner than 4 weeks.
Answer last updated on: 03/14/2019