I couldn't tolerate the increase from 15 to 22.5 for similar reasons. It just felt too activating to take at bedtime and I couldn't get to sleep. I figured 30 would just increase that so I didn't even bother trying. I've stuck at 15mg but it doesn't seem to be doing much tbh.

I would assume that you adjust to it eventually. I don't really notice my 15mg evening dose in the way I used to when I first started.