Scopus is a large abstract and citation database of peer-reviewed literature: scientific journals, books, and conference proceedings. Scopus includes over:
Image from: Elsevier Scopus fact sheet.
|What Scopus can do for you||What Scopus CANNOT do|
It's true that you can access Embase citations through Scopus, but it only allows keyword searching. If you look for the term "heart attack", you will miss anything indexed using the Emtree terminology "myocardial infarction".