Pharmacoepidemiology, the study of use and effects of medications, devices, diagnostics, and other medical interventions in large populations, is a science under constant development. New study designs are added to the armamentarium, new data sources are being leveraged, and new approaches are developed. All are changing the conduct of pharmacoepidemiological studies. In addition, the growing availability of electronic healthcare data, and the openness of regulators to review real-world evidence (RWE), is attracting a variety of disciplines who are new to epidemiologic methods in general and to pharmacoepidemiologic applications and causal inference work on drug effects in particular. For newcomers to the field of pharmacoepidemiology, this provides a challenge in assessing “where to begin” when diving into the ever-growing literature.To establish a curated curriculum for newcomers covering the most important aspects for persons new to the field of pharmacoepidemiology, a group of senior pharmacoepidemiologists from five different countries, developed and solicited input to such a reading curriculum via social media (Twitter and Linkedln) in March 2021. Our call received considerable attention from pharmacoepidemiologists all over the World. After removal of duplicates or papers covering the same topic as well as purely applied studies (i.e., with no specific methodological contribution), we grouped the remaining suggestions (n = 64) into (i) basic methods; (ii) biases; (iii) reporting/guidelines; (iv) methods and designs; and (v) statistical analyses. Across all papers, the remaining papers, each of the assessors, the authors of the present letter, was asked to vote for between 20 and 30 of the papers. We then selected, the papers with three or more votes (n = 33), followed by two rounds of adjustments to prioritize between partially overlapping papers, resulting in a final selection of 30 papers, or 1 month of daily readings in pharmacoepidemiology (Table 1).
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