If you haven't been to The Wellcome Trust to see the exhibition Medicine Man then you really need to go. http://www.tinyurls.co.uk/bwa The sheer scale of the artifacts collected by Sir Henry Wellcome is represented well. Audio user guides take you through the stories they have to tell.
It's a pleasure to visit The Wellcome Collections building and I rejoined the History of Medicine library whilst I was there. Well worth a day out and it's free.