This page is a medical professional information site containing specialty focused clinical resources like full drug and disease monographs, patient education, and also specialty news and conference information. The site is filled with well categorized sections that are at the same time divided into more subsections, which makes the navigation incredibly easy and accurate.
Without any question this is one of the best, more reliable, specialty-oriented sources of information about drugs and diseases. The site offers many services, including an alerts system that lets registered visitors know by mail when new drugs that might be of interest to them are released. There are several more services offered in the page 100% FREE for any health related professional and for a small fee for non professionals. 
