To find articles about the history of medicine, use one of these indexes:
Provides citations and some brief abstracts to journal articles, conference proceedings, books, book reviews, and dissertations in the history of science, technology and medicine and allied historical fields from prehistory to the present.
PubMed and Ovid are two ways to search MEDLINE, a journal index from the National Library of Medicine that goes back to 1946. There is a filter that allows you to limit to "History of Medicine." Search for your topic and then limit your search using the filter.
To find historic articles, use one of these indexes:
Consult bibliographies to identify historically important medical literature:
Books on the History of Medicine
Journals on the History of Medicine