MEDLINE is free to use via PubMed.gov. However, for most types of research you’ll need to search through more than one database. Searching databases separately (like MEDLINE, then Embase followed by Biosis and then ClinicalTrials.gov) can quickly become very time consuming. This is where it makes sense to use a single research platform to search multiple databases at once. This saves you time, especially if you use a platform that automatically removes duplicate references (which is a major problem when searching Embase and MEDLINE separately).