Guides for key topics in patient safety through context, epidemiology, and relevant AHRQ PSNet content. The Patient Safety 101 Primer provides an overview of the patient safety field and covers key definitions and concepts.
Medication errors can occur at any step along the pathway that begins when a clinician prescribes a medication and ends when the patient receives the medication. Adverse drug events—harm experienced by a patient as a result of exposure to a medication—are often the result of medication errors and are likely the most common source of preventable harm in both hospitalized and ambulatory patients. Preventing adverse drug events is a major priority for accrediting bodies and regulatory agencies.