I have a camera on my cats overnight. Imagine my horror when one of them (15 years old) started fitting badly
![Sad :(](./images/smilies/icon_e_sad.gif)
I have the video clips which I showed to the vet who accepted this was most likely to be a reaction to Profender. This was very possibly an allergic reaction to Praziquantel, the active ingredient in Profender.
Bayer doesn't mention in the contraindication section of the leaflet that it can cause seizures if ingested. My cat's reaction to Profender has been reported to Bayer. Bayer tell me that the toxins will leave the body in 48 hours which correlates with the timing of fits starting/stopping.
Another product called Stronghold does mention 'reversible seizures can be caused'. However, I did use Stronghold in spite of what it says on the leaflet!
It's often only when a negative reaction happens that we see the risks involved when using insecticides. It did happen to my cat, however rare it may be.
Please note that I have edited this post since posting it yesterday.