When doing a search in PubMed, you can use the filters to limit by article type. Unfortunately peer review is not one of those listed type of articles within PubMed
CINAHL Ultimate is a database in which peer review can be checked off and limit the results to peer review.
NOTE - most professional healthcare research databases do not have a peer-review search filter.
To determine if an article is peer-reviewed you must determine if the journal which published it is a peer reviewed journal. The quickest way is to locate the journal's official web site. If it is a peer-reviewed journal they will advertise it, usually under the "Information for Authors" or "About Us" section.
