Here is a collection of user reviews for the medication Donnatal Extentabs sorted by most helpful. 
The following Patient Discussions have not been medically reviewed. See additional information.
I was diagnosed with IBS and put on this medication. In combination with other drugs my symptoms were drastically decreased and virtually gone. Published: June 28, 2009 ::
This medicine was prescribed for IBS by my former doctor, but it just didn't seem to help at all. The tiny amount of phenobarbital did nothing to relax or calm me, and the antispasmodics had little to no effect on my cramping and diarrhea. Librax is much better for me. Published: July 24, 2008 ::
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I was put on this medication for severe ibs-d. It didn't work and caused withdrawls for weeks. Be careful of this medication. Published: March 12, 2009 ::