Review Articles are about a particular topic (e.g., a review of the safety and effectiveness of a particular class of drugs), written by an expert or group of experts in the field. These articles reflect current thinking and may influence how physicians practice. They are not a clinical study and not reflective of original research. The content in review articles looks more similar to a textbook than a clinical study.
Review articles from well-respected publications about your product and competitors will help you in keeping abreast of current medical knowledge.