Good news! Most of the journals in Medline/PubMed are peer reviewed. Generally speaking, if you find a journal citation in Medline/PubMed you should be just fine.
There is no way to limit your results within the PubMed or the Medline on Ebsco interface to knock out the few publications that are not considered referred titles. Please ask a librarian for help if you are concerned about a specific title.