Hi -
Even if it's a bother, do get a letter to your DH's doctor before that appointment on the 6th so the doctor is aware of the situation, the worrisome symptoms your DH is having, and the requst for a neurology referral. If you call the doctor's office today and talk to a nurse, you might even be able to get the referral to the neurologist now, make that appointment, and have a shorter wait until the appointment with the neurologist.
I will say that the episodes that are seizure-like and the dizziness, sound like something other than AD. There are other things (some fixable) that can be wrong in someone's head that account for all of the symptoms, from stroke, to clots, to normal pressure hydrocephalus, and more. I don't know what would or would not show up on CT (how recently was the CTscan done?).
Meanwhile, it's good that you plan to quietly supervise as your DH takes his pills. If he's taking them incorrectly at all, that can cause some of the symptoms you've observed.
If DH's regular doctor does not suggest you see a neurologist, you can request it, insist on it, and otherwise be assertive!!
Wishing you well! Barbara