Doc Samson said:
As a text, you can't go wrong with:
Massachusetts General Hospital Handbook of General Hospital Psychiatry
by Theodore A. Stern, Gregory Fricchione, Ned H. Cassem (Editor), Michael S. Jellinek, Jerrold F. Rosenbaum
but I also like:
Manual of Psychiatric Care for the Medically Ill
by Antoinette Ambrosino, M.D. Wyszynski (Editor), Bernard, M.D. Wyszynski (Editor)
In terms of articles, what immediately springs to mind are:
Appelbaum PS, Grisso T. Assessing patients' capacities to consent to treatment. N Engl J Med. 1988 Dec 22;319(25):1635-8
Boyer EW, Shannon M. The serotonin syndrome. N Engl J Med. 2005 Mar 17;352(11):1112-20.
Freudenreich O, Stern TA. Clinical experience with the management of schizophrenia in the general hospital. Psychosomatics. 2003 Jan-Feb;44(1):12-23.
Goldman L, Lee T, Rudd P. Ten commandments for effective consultations.
Arch Intern Med. 1983 Sep;143(9):1753-5. (not psychiatry specific, but great nonetheless)
Garrick TR, Stotland NL. How to write a psychiatric consultation. Am J Psychiatry. 1982 Jul;139(7):849-55.
Masand PS, Tesar GE. Use of stimulants in the medically ill. Psychiatr Clin North Am. 1996 Sep;19(3):515-47.
Kosten TR, O'Connor PG. Management of drug and alcohol withdrawal. N Engl J Med. 2003 May 1;348(18):1786-95.
Pelonero AL, Levenson JL, Pandurangi AK. Neuroleptic malignant syndrome: a review. Psychiatr Serv. 1998 Sep;49(9):1163-72.
And finally, this is a fantastic chapter, but it's going to take a lot of digging around to find it:
Kahana RJ, Bibring GL: Personality types in medical management, in Psychiatry and Medical Practice in a General Hospital. Edited by Zinberg NE. Madison, Conn, International Universities Press, 1964, pp 108-123