I took Levbid for several months. I began taking it at the start of allergy season. That year, I had the worst allergies...most of my symptoms were as usual, but now I was always tired, my throat was very dry and my eyes felt gummy rather than runny.These symptoms lasted well after the allergy season. Then, when my husband and I went to a wedding, I decided to take an extra Levbid to help ensure that I wouldn't get diarrhea. I had a rotten time. I felt like I could barely keep my gluey eyes open.That was the first time I made the connection between these symptoms and Levbid. I then began experimenting and, on days that I didn't take it, I wasn't so tired, my eyes felt fine and my throat wasn't dry.I ended up going off of it because the relief it provided me from me IBS symptoms was mild, but the side effects were strong.Levbid did do one really good thing for me, though...it helped my motion sickness. I still have some around that I take on days when I'm going on a long car ride or taking my daughter to the amusement park.