I took Prozac for about three weeks, then the switch flipped. Mania was home. My employers at the time liked my productivity, though day shift workers hated it, because they couldn't keep up with two people trying. But then the gremlins took over and I started doing things unrelated to work and semi dangerous and even outright dangerous to speed up production to try to really let day shift have it. I had a machine move to the next side while I was changing a part inside a running cnc mill. Danger! Stupidity! Mania! I also started messing with other employees and something got broken. I got fired. I lost my insurance and my Prozac. I found Depression again. I did love THAT kind of high though because street drugs can't do that for me, none of them.
As for the digestion, it made me have very dark and tarry, and painful, excrement every time, and my stomach ALWAYS hurt, but I felt GREAT anyway. I probably had an ulcer but was too manic to notice.