I have read on different forums of dogs throwing up after taking it, but most have no problme. I only have one problem with it. Honey has been on Interceptor and just had her lat pill on the 1st and I hae to get something else befroe June 1. This will most likely be my choice.
BUT, Honey rarely has a flea. If we see a flea or she scratches, we give her the Comfortis for fleas. However, it is only about 3 times a year. I hate giving it to her via the Trifexis every month when it is not needed. But I guess until Interceptor comes back, tht will be what she gets ech month.