Objective: We aimed to identify medications commonly involved in dispensing and prescribing errors in hospitals, using a survey-based approach. Methods: A cross-sectional questionnaire study was conducted by distributing questionnaires to representative pharmacists in charge of medication error reporting in 99 general or higher-level hospitals with 500 beds or more. Results: Out of the 99 hospitals contacted, 38 hospital pharmacy departments (38.4%) responded. Most frequently reported medications involved in dispensing errors were total parenteral nutrition products (23.7% of respondents) followed by morphine (18.4%), lansoprazole (15.8%), and quetiapine (15.8%). Medications commonly involved in prescribing errors that were categorized as extremely or significant important included antineoplastic agents (platinumbased agents, fluorouracil, paclitaxel), systemic anti-infectives (vancomycin, levofloxacin), amiodarone, ketorolac, metoclopramide and dexamethasone. Conclusion: The medications identified in this study as being frequently involved in hospital medication errors can be used as a reference when developing a high-alert medication list for hospitals in the acute care setting. (PeRM 2023;15:72-80)