Entrez
Simultaneously search multiple life sciences databases at the National Center for Biotechnology Information (NCBI).
Gateway
The National Library of Medicine Gateway allows users to search in multiple retrieval systems at the U.S. National Library of Medicine.
Healia
Personalized consumer health search engine. Using specialized algorithms, it attempts to evaluate the quality of health-related content found on web pages.
Healthline
Search engine focused on consumer health care and medical information.
KMLE Medical Dictionary
Search several resources simultaneously for medical terminology, medical abbreviations, journals, and drug names.
Med Help International Search
Consumer medical search engine comprising articles, patient support groups, glossary, and Q&A.
Med411.com
Search engine for the medical field, information for doctors, hospitals, clinics, research, and sources for equipment and supplies.
MedHunt
A tool from Health on the Net that searches the full text of 60,000 medical documents. Searches can be narrowed by location or type of source.
Medical World Search
This tool has the ability to query other search engines, also provides a discussion forum, medical spelling and drug acronym devices. All users must register and pay annual membership fee.
Medic8.com
Directory and medical search engine for healthcare professionals.
U.S. Non-Commercial Medical Search Engines
Dr. Claudia Krenz provides search boxes and instructions for eleven specialist search tools, mainly maintained by the National Library of Medicine.
Vivísimo ClusterMed
Sends requests to the PubMed search engine and clusters the search results.
Worldhealthcare.net
A UK based medical search engine providing informative resources from around the globe.