Worldhealthcare.net A UK based medical search engine providing informative resources from around the globe. http://www.worldhealthcare.net/

Med411 A medical search engine and portal. http://www.med411.com/

Med Help International Search Consumer medical search engine comprising articles, patient support groups, glossary, and Q&A. http://www.medhelp.org/search.htm

Medic8.com Directory and medical search engine for healthcare professionals. http://www.medic8.com/

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. http://www.srv.net/~msdata/US_medsearch.html

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. http://www.hon.ch/MedHunt/

Gateway The National Library of Medicine Gateway allows users to search in multiple retrieval systems at the U.S. National Library of Medicine. http://gateway.nlm.nih.gov/

Vitalseek Indexes and rates websites and resources in selected medical areas. http://www.vitalseek.com/

Vivísimo ClusterMed Sends requests to the PubMed search engine and clusters the search results. http://vivisimo.com/clustermed

Article Sciences Scientific article search and order engine, a service provided by Institut de l'Information Scientifique et Technique (INIST) of Centre National de la Recherche Scientifique (CNRS), France. http://articlesciences.inist.fr/

Entrez Simultaneously search multiple life sciences databases at the National Center for Biotechnology Information (NCBI). http://www.ncbi.nlm.nih.gov/gquery/gquery.fcgi

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. http://www.mwsearch.com/

OmniMedicalSearch.com A medical metasearch engine including various seek options and information tools. http://www.omnimedicalsearch.com/

Marijuana Special Report New Scientist articles address topics such as: Can you get hooked on cannabis? What does it do to your brain? Is it really safer than alcohol? http://www.newscientist.com/hottopics/marijuana/