Irritable Bowel Syndrome
"I just found out that this drug is &quot;unapproved&quot; by the FDA because it is &quot;not effective&quot;.  However, in my experience, it is the most effective drug I&#039;ve tried for my IBS.  I&#039;m taking Linzess and use fiber supplements to regulate my system.  These have helped to limit the number of attacks; however, I do still have them about twice a month.  When my symptoms start, without Levsin SL I am in agony for anywhere from 45 minutes to two hours; with the Levsin SL, my symptoms come to a dead stop within five minutes of taking it.  The plain (not sublingual) tablets take a little longer to work, but they are still better than suffering for over an hour.  I don&#039;t understand how the FDA determined it was ineffective."