SUMMARYWhat is known and objective: Medication discrepancies are common at hospital discharge, and medication reconciliation is widely endorsed as a preventive strategy. However, implementation is difficult for instance due to the unreliability of patients medication histories. In the Netherlands, community pharmacies are well-informed about their patients' pre-admission medication status which enables thorough post-discharge reconciliation. Our aim was to study the frequency and nature of medication discrepancies, missing patient's knowledge and administrative problems at admission to primary care. Methods: A cross-sectional study was conducted in pharmacies belonging to the Utrecht Pharmacy Practice network for Education and Research in the Netherlands. Structured checklists were used to evaluate all discharge prescriptions presented by adult patients discharged from the hospital to their own home during the study period. The primary outcome was all possible problems with continuity of care, defined as (i) the number and type of medication discrepancies, (ii) administrative problems and (iii) the necessity for patient education. Results and discussion: In forty-four pharmacies, checklists were completed for 403 patients. Most discharge prescriptions (92%) led to one or more problems with continuity of care (n = 1154, mean 2Á9 AE 2Á0), divided into medication discrepancies (31%), administrative problems (34%) and necessity for further education (35%). Medication discrepancies (n = 356) resulted mainly from missing pre-admission medication (n = 106) and dose regimen changes (n = 55) on the discharge prescription. Administrative problems (n = 392) originated mainly from administrative incompleteness (n = 177), for example missing reimbursement authorization forms, or supply issues (n = 150), for example insufficient pharmacy stock. The patients' lack of medication knowledge post-discharge was illustrated by the high need for patient education (n = 406). What is new and conclusion: Community pharmacists are still confronted with problems due to inadequate documentation at discharge which can inflict harm to patients if not properly addressed. To reduce these problems, a rigorous implementation of the medication reconciliation process at all transition points, standardized electronic transfer of all medication-related information and interdisciplinary collaboration are crucial. WHAT IS KNOWN AND OBJECTIVEThe transfer of patients from primary care to the hospital and vice versa is a process with an increased risk of patient harm. Patient harm is often caused by medication errors evoked by frequent changes in the medication regimen during hospital admission, involvement of different healthcare professionals and inadequate documentation and transfer of information between healthcare providers.