The health care pathway of patients suffering from mental disorders is complex and includes a risk of interruption of treatment. We implemented medication reconciliation at patients' admission to mental health care service in February 2017. The aim of this study was to achieve a feedback experience answering our questions about the feasibility and relevance of this process. A prospective analysis of medication reconciliations over the first 7 months of implementation was carried out according to 3 activity indicators and 6 performance indicators. A total of 39 patients were reconciled and 56.4% of them were in enforced hospitalization unit. All patients were interviewed by the pharmacist. Collected information during this interview was concordant with at least one of the other sources in 70.4% of the cases. Thirteen patients were not reconciled within 72h after their admission because of their psychiatric pathology. The average number of unintentional medication discrepancy (UMD) detected was 0.97 per reconciled patient. The rate of major gravity UMD was 23.7%. The number of UMDs per patient was significantly higher in enforced hospitalization unit (P<0.05). UMDs were essentially related to somatic drugs (81.6%). Nearly 95% of the detected UMDs resulted in a modification of prescription. These results show that medication reconciliation at patients' admission is feasible and relevant in psychiatry. To limit constraints related to psychiatric pathology, we propose to perform medication reconciliation of patients more than 72 hours after patient admission provided that their clinical condition allows it.