Tis the season…
The post has stuff on ticks, but in case you need a specific statement:
Frontline is the only med that consistently and and at least relatively safely controls ticks. Let’s run down the others that claim to:
Advantix: adds permethrin to kill “and repel” ticks. It’s basically the same as putting Bio-Spot or Zodiac on on top of Advantage. Permethrin is much too strong and much too broad spectrum and is associated with multiple side effects.
ProMeris: adds amitraz to kill ticks. It’s basically like adding a Mitaban dip to the flea med. Amitraz is very toxic (ask any groomer who has used a lot of Mitaban how it has affected her nervous system) and is especially dangerous to cats.
Amitraz is also the active ingredient in Preventic collars.
Comfortis, though not advertised for this purpose, does kill ticks for about a week. Then it loses effectiveness slowly but surely. It is VERY effective for fleas.