This reminds me a bit of a discussion I had with a surgeon about my then 19 year old son. He (my kid) had suffered a series of spontaneous pneumothoraxes, which I now know, is not that uncommon in lean, lanky young men. There is also a genetic component to it and my Dad had had similar problems when he was a teenager. (I inherited my Mom's "height gene" I think...)
My son had recently started diving with me, and all of these episodes had occurred on dry land. The kid had had some surgery to remove the "blebs" on his lungs and was deemed to be cured.
We asked the surgeon, who was a certified diver, about the lad resuming diving. He suggested that it would probably be alright, but given that the kid was new to diving (and therefore not addicted to it) and the severe implication of a further rupture at depth, we all agreed that diving wasn't for him. He now lives in Australia and surfs everyday on the way to work...
And... he has had several less severe occurrences since the surgery... and thankfully, he wasn't diving, or he might possibly be dead now.
I love diving as much as anyone, but I don't love it more than I love living. If I had an "unusual" health issue that was unexplained and that could kill me without notice, and possibly result in injury to my buddy, I think I would think pretty hard about hanging up the fins for some time.
Perhaps you could get off the meds, and if nothing happens for a couple of years... try it again.
The concept of "taking it easy" doesn't really apply here... a seizure in 5' of water is likely to be"as fatal" as one at 105'.
All the same, this sux, and no matter what you decide, I hop eit works!