Date	Event	Description
6 May 2014	Amended	Michael Stokes added on the byline as an author and his contribution specified.
1 March 2013	New citation required and conclusions have changed	In this update, there is now support for a modest beneficial effect of ursodeoxycholic acid (UDCA) on pruritus, in the UDCA versus placebo comparison.
20 February 2013	New search has been performed	Search updated. Twelve studies have been included (Binder 2006; Fang 2009; Glantz 2005; Huang 2004; Kondrackiene 2005; Leino 1998; Liu 2006; Luo 2008; Roncaglia 2004; Shi 2002; PITCH 2012; Zhang 2012). A new team of review authors prepared this review update. The methods have also been updated.
6 June 2011	Feedback has been incorporated	The authors have replied to the feedback by Gludd from July 2007. SeeFeedback.
30 November 2009	Amended	Search updated. Nineteen reports added to Studies awaiting classification.
30 October 2008	Amended	Converted to new review format.
13 November 2007	Feedback has been incorporated	Feedback added.