Oh no! I know Jaxson will itch every once in a while but it's just an itch. I've used frontline since we got him (2 1/2 months) & we haven't had any issues with it. Could be your area & if that's the case you should try to find someone with pets around you & see what they use. Your vet should know the best information though so try & talk with him/her. Also I always research so see if you can research flea medicine that works best in the type of area your in. Good luck!!
Also have you thought about a flea shampoo for pups? I have one for Jaxson that he gets once a month as well.