Embase

Embase is the world's largest biomedical abstract database of peer-reviewed, scientific literature, press publications and conference proceedings, used for biomedical desk research, systematic medical literature reviews and drug and medical device safety research.
Embase provides comprehensive coverage of publications:

• Journals from 1974 to the present
• Over 33 million record
• Over 8,500 journals from over 4,000 publishers in over 95 countries, including all MEDLINE titles
• Over 2,900 indexed journals unique to Embase
• Over 1.5 million records added annually, an average of over 6,000 each day
• More than 2.4 million conference abstracts from over 7,000 conferences since 2009
• Full-text indexing of data on drugs, diseases and medical devices.

Thanks to its intuitive interface and automated query builders (eg PV, PICO), Embase supports creating complex search strategies in a matter of minutes.
More on the info page: https://www.elsevier.com/solutions/embase-biomedical-research