I have HFA (AS) and seizures. Tentative diagnosis of TLE from one neurologist, but two others revised that to seizures secondary to Asperger's. So I'm maintained on clonazepam, which has greatly reduced the frequency and intensity of the seizures.
My seizures include mostly sensory and affect issues, not motor issues. A really bad seizure used to "ground" me for days, and I have gaps in my memory from some of those times. I otherwise have a good biographical memory. But since sensory issues are themselves a part of my AS, it's hard to parse what is going on sometimes. I've also been diagnosed with Sensory Integration Disorder by one psychologist, and neurologists concur that I have sensory issues or SID.
But through trial and error I discovered that a "low stimulation lifestyle" helps reduce the likelihood of seizures. Strong light, particularly sunshine, is a powerful trigger, as are high-pitched or low, throbbing noises. Air travel is therefore problematic, as is summer.
I also have been through hallucinations in all five senses, dissociation, and derealization, and been treated with neuroleptics and antipsychotics during these periods (the meds did not work, as I am very intolerant of most medications, and the majority of foods).
Obviously, I am not as high-functioning as many here. I still consider myself HFA, but with obvious caveats.
The best suggestion I can make for anyone with seizures and/or AS (ASD) is to get tested. I've had MRIs, EEGs, full neuro workups, and despite the cost, am glad I did. I've seen three neurologists, four psychiatrists, six therapists, and also been evaluated by several other specialists to check related issues. Being able to understand, strategize, and manage my condition has greatly improved my confidence and quality of life, even if it did strain my bank account considerably.