That’s usually “just” too much choline. When you have multiple products with a choline source (CDP, GPC, bitartrate) and an AChE-I (huperzine being the most common one), you can run into that sort of issue. Which is why I usually prefer not to go crazy with either choline or AChE-I doses, instead staying on the lower end of each and combining them, so if I take some more later, I’m not overdoing it. I like 250mg of CDP (or GPC) and 100mcg huperzine. I know some people will double each of those and combine them, or even go 4x that huperzine dose, and I think that can be a bit much for some people, particularly if it’s not the sole source of choline and AChE-I for them throughout the day.
YMMV of course.