First of all my heart goes out to you. It is just so tough having to deal with a fur baby being sick and not knowing how to fix them
To answer you question, yes. Deworming medications can cause seizures. It is rare but, it can happen especially if the animal has a severe parasite infestation or is ill.
You said your girl was acting 'weird' which is why you took her in. What kind of symptoms was she displaying?
I am hopeful she will pull out of this and sending lots of good thoughts your way
