Many Electronic Health Record (EHRs) data displays are insensitive to their settings, contexts, and to clinicians’ needs. Yet, the contexts in which the data are displayed critically affect EHR usability and patient safety. Medication prescribing is a complex task; especially sensitive to contextual variation in EHR displays as vast variations in formats and logic are often unnecessarily confusing, leading to unwanted cognitive burdens and medical errors. With examples of EHR screenshots, we illustrate contextual variations in medication and allergy displays across different EHR systems and implementations—noting often seemingly haphazard differences that can lead to misunderstandings and misinterpretations.