Ava was on Trifexis for a couple of months in the summer, but she didn't tolerate it well (she vomited the last 2 times she had it) so we switched her to a different med. The itching doesn't necessarily have to do with the drug, especially if you don't see any flea or tick marks on her. What kind of food is she on? Ava used to itch like that when we first got her, and she was on Science Diet at the time. After switching her to a grain-free food, she stopped the itching.
Ava Marie (4/3/2012)