constipation
"This drug is awful! Gives me bloating and not a very good laxative. I took 1 pill unlike the other reviews, I didn't get terrible diarrhea. But it woke me in the night every time I took it (maybe I took it 4 times) with terrible pain like my stomach was burning and ON FIRE. So sick sick sick and not sure whether I would throw up or what was going to happen. Sweating, shaking... the stabbing pain in my belly was so bad.  Anyways I am going to throw the rest of the package out to avoid taking it again. 
One time I was so super constipated I took 3 pills and less than an hour later I got gas and diarrhea, but no abdominal pain. Then I kept waking up in the night and rushing to the bathroom I almost pooped the bed!"