constipation
"This drug should not be legal. I took  two tablets at night. I woke up with severe cramping and staggered to the bathroom,  then the flood gates opened. I 

experienced the worst diarrhea imaginable, It was was like turning on a faucet full blast  pausing it for a few seconds and  then turning it back on again and again. I  alternated between this and throwing up while experiencing horrendous cold chills while I  veered  in and out of consciousness. After about 30 minutes I staggered back to bed only to rush back to the bathroom for round two. This drug works, but so does severe food poisoning."