I am taking Liquid Lithium. As far as the GI stuff it's not that bad for me. I took it years ago as well and there were some side effects like mild nausea but not enough for me to stop taking it. Lately I noticed a little nausea with meals. I take it twice a day. Mood wise I am not better yet but the med is not giving me diarrhea or stomach cramps. I also order it from my pharmacy about 5 days in advance so they have it when I need it. It is not a commonly prescribed formula.
Good luck!