Could Botox Injections for Migraines Cause Seizures?

Please see a neurologist right away for appropriate exams and tests / scans to ensure that your migraines are not caused by a cause of the seizures. The botox is unlikely as a cause of the seizures.

If you are not being worked up for the seizures, you need to be referred to a neurologist so the basis of the seizure disorder is appropriately investigated.  

New onset or recurrent seizures have been reported with Botox administration. Most cases were in those pre-disposed. It is possible that Botox unmasked seizure activity that might have been involved in your migraines.

I think it would be important for you to consult with a neurologist for an evaluation.