The following are some examples of databases that allow you to filter results by original (empirical) and review articles. Not every database will have this option, however, by reading the abstract, you will be able to tell which articles are original (empirical) and which are reviews.
Use the Article Types limiter to narrow to specific types of articles. Click on customize for more options, including specific types of empirical articles, such as clinical trials.
Use the Article Types limiter to narrow to specific types of articles. Click on customize for more options, including specific types of review articles, such as systematic reviews.
Use the Methodology limiter to narrow to empirical study (original research).
You may also want to try clinical case study, clinical trial, or treatment outcome depending on your topic.
Use the Methodology limiter to narrow to literature review.
You may also want to try systematic review or meta analysis.
Use the Document Types limiter to narrow to Articles.
In Web of Science
Use the Document Types limiter to narrow to Review.
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