I just get gassy easily and at the wrong times really obnoxiously so, that bean-zyme stuff helps a bit though. Then it ruins my digestion somewhat, otherwise besides a weird feeling I get in my nose after consuming some I don't have any issues (I'm actually getting it less now with the funky scent that gets stuck up there and a dry nose after drinking, maybe it's some sort of reaction when your body isn't used to it? I dunno, just mildly irritating). Just don't eat a lot after you drank some, your belly will not be happy. I don't really have much of a desire to eat right after I drink anyways, kava is filling to me as it is. I get down a little snack and that does it for me.
I would the next biggest thing is keeping hydrated, I still haven't found out how to perfect that yet with how much i should drink after kava and when. Sometimes I can accidentally give myself a headache. Though I always hydration issues and that's no stranger to me especially when it gets warmer outside. Outside a lot on my feet every day and it uses a lot of my fluids in addition to coffee drinking.