When I write about health issues and medical care I often do not know where to send people for reliable information that they can count on day after day, year after year. In Overdo$ed America, [links to my amazon store] a book by a doctor (Abramson) who is deeply concerned about the distortions of medical information that are the main source of medical information for both doctors and patients, three websites are noted:

Center for Medical Consumers
University of British Columbia Therapeutics Initiative
Public Citzen's worstpills.org

He offers these three as examples of sites where you can get unbiased information. They are a treasure. Take note. Bookmark them. You may need to pay for a subscription for some of the information - I believe it is worth the small cost to pay for the absence of commercial support. I should note, too, that these sites do not provide ALL the information about any subject. They are simply unbiased sources of medical information.