raises hand
I was on Lamotrigine and it didn't do anything for me whatsoever. I was weaned off that first and went on Keppra. This was about 15 or so years ago, so it was pretty new over here.
My Dr increased my dose to make it quite high over a number of weeks, and I had all sorts of side effects. The biggest ones were complete absence of hunger (great at first, but I ended up eating a tiny amount of food every day for about four months in the end), horrific kidney pain (I was using hot water bottles and popping pain pills daily), and horrendous issues with sleep (I would sleep 90% of my spare time. I was holding down a full time job still do and I was sleeping until 30 mins before work, then sleeping from as soon as I got home until it was time to get up again, apart from a short space to eat. I literally wasn't doing anything else).
I also had Keppra rage pretty bad but I didn't recognise it in myself. My mum did, and pointed it out, and said we couldn't continue like that.
Anyway, the kicker is that Keppra is amazing at seizure control for me. So the Dr was keen to experiment with the dose. We started reducing the amount I was taking and got it down really low (500mg per day), which was the highest I could tolerate the side-effects with, but still maintain seizure control.
At about six months in my hunger returned (woe!) and the kidney pain stopped. The rage also mostly vanished (though I do think I am more short tempered than before Keppra). Sleep can still be an issue -- the problem with Keppra is that it makes you sleepy but it can ALSO give you insomnia. So I tend to get really bone-tired after work but then really struggle to sleep after 11pm. This is regardless of how much or how little sleep I may have had.
So I mostly manage the remaining side-effects by having a time-controlled nap in the evening when I am able, and that allows for me to be okay with the insomnia until it lets me crash again around 3am.
Exercise helps. B-vits help. Water helps.
I do sometimes still have absence seizures if I am very stressed, but they haven't turned into tonic clonic/grand mal seizures since I have been on Keppra. I was also told that because Keppra has a really short half-life, it's perfectly okay to take top-up/emergency doses should I feel I am at risk (in certain situations when I have had very little sleep and I may be very stressed). So I just take half a pill (250mg) top-up in the evening when that happens and it tends to sort me out.
Honestly, for me the side-effects were worth it. They were hell, but they did (mostly) go away. No other med has controlled my seizures before Keppra. I am quite sensitive to it, hence the low dose for tolerance, but I think more doctors are aware of this possibility now. My advice would be to try it but to go into it with eyes wide open, have someone you trust who can tell you about the side-effects you may be oblivious to, and be willing to ride it out for a while.
Happy to answer any questions!