I wish I still had access to the online database of medical journals that I had when I worked at the hospital from which I retired.While there I also had access to Countway Library,the main library of Harvard Medical School.Maybe I'll contact a former fellow worker to see if *he* can look it up.
Maggie can you help GSC with his research ?
There is, including Johns Hopkins. Simply google or search for:
"DXM" "liver damage" pathology
You will find all the hits you want to explore. DXM is the substance that is being abused.
http://www.cesar.umd.edu/cesar/drugs/dxm.asp
Dextromethorphan (DXM)
http://www.webmd.com/parenting/teen-abuse-cough-medicine-9/default.htm
Teen Abuse of Cough and Cold Medicine
http://www.erowid.org/chemicals/dxm/
(Articles and research links)