seizures cause, symptoms and treatment

(TEXAS)

My Pitbull is 5 yrs old has been suffering of attacks making her difficult to breathe and suffocating herself with her own saliva, the last one was yesterday.

after the attack she seemed disorientated. We believe the cause is seizures.
What can we do and how it can be prevented?
We are really concern... Even we have asked, never have received any response about this from our Vet.
Any kind of information will be useful, thanks for your answer.