
I swap between advocate alown and advantage and milbimax as advocate does worms as well except tape worm so don't see the point in using a wormer as well, also my vet advised not to after I used advocate befor going to stay the weekend at a house and it turned out there dogs had tape worms so I got wormer from the vet and they said to Waite at least a week before using it after the advocate.
Any way never had any lasting effects, yes it makes where you put it on go all stiff but after a few days and a brush it's fine. So I wouldn't use it with in 3 days of a show.