You can search this huge National Library of Medicine database of medical abstracts through any one of a dozen or more Web sites. But with a Medscape search of Medline just one entry will let you also search Medscape's full-text articles or buy a book on the subject in the Medscape bookstore. And this month Medscape will be adding a premier drug database that you will be able to search with the same entry. To use Medscape's services you do need to register when you first use it. But registration is quick and easy.
Registration is also free.