McGraw-Hill's AccessMedicine.com is an online reference resource that includes Harrison's Online, Current Medical Diagnosis and Treatment, other core medical texts, Lange clinical review library, USMLE review, drug information, patient education, and many more resources.

Database of full-text clinical practice guidelines, technology assessments and health information.

Web portal containing full-text content of over 50 publishers and other organizations. Access includes full text textbooks, Clinics of North America, full text journals, practice guidelines, drug information and patient education.

Holdings: 1999

A public resource for evidence-based clinical practice guidelines.

From USP Publications
In order to access this resource you must use use Microsoft Internet Explorer (version 5.x or 6.0) . In addition, full text, online access requires username and password. To access the password for this resource, you will be required to authenticate yourself as an authorized Penn user. If you have further questions, please ask at a reference desk.
Holdings: 2004-

Unbound Medicine is a portal to medical information including Medline, journal table of contents, e-book content (Current Consult Medicine 2006 and Pocket Guide to Diagnostic Tests 4th ed.) and other discounted e-book content. It is accessible in three ways: web, handheld device and wireless.

UpToDate is a practical clinical reference designed to provide instant access to the information you need. It is comprised of thousands of original topic reviews written by a recognized faculty of experts who each address a specific clinical issue and provide detailed recommendations. Always current, UpToDate can be your one source for fast, reliable clinical information.

From Wiley InterScience
The Cochrane Library consists of a regularly updated collection of evidence-based medicine databases.