The aim of this study is to evaluate the impact of an enhanced collaboration between a hospital pharmacist and a community pharmacist during hospital discharge. For patients taking multiple medications, hospitalization often involves numerous changes to their treatment regimen. For community pharmacies, discharge prescriptions are often complex, and they sometimes lack the information that pharmacists need to deliver the treatment as safely as possible. As a result, there is a risk of medication errors, and a risk for patients. We aim to evaluate the benefits of this collaboration for adult patients admitted to the internal medicine ward of a regional hospital who are taking seven or more drugs and are being discharged to home.

The main question it aims to answer is : Does the enhanced collaboration reduce the number of drug-related problems encountered by community pharmacists with discharge prescriptions ? Researchers will compare patients when a hospital pharmacist is involved during the discharge process and when he or she is not involved, which corresponds to normal care.

The hospital pharmacist will not perform the intervention directly on the patient, but only with the community pharmacy. Once they agree to participate in the study, patients will only have to go to their usual community pharmacy after discharge and accept that the hospital transmits medical information to their usual pharmacy.

Inclusion Criteria:

• Patients admitted to the internal medicine ward for more than 48 hours
• Patients prescribed seven or more drugs at the time of screening
• Patients discharged to home
• Patients able to give informed consent as documented by signature

Exclusion Criteria:

• Patient discharged to another hospital, nursing home or rehabilitation clinic
• Refusal of the community pharmacy to participate
• Inability to sign consent and follow the procedures of the study, due to language problems, psychological disorders, dementia, alterations of consciousness and lack of judgement

Data to be shared includes demographic and study outcomes, with a data summary Data will be anonymized and shared in a secure format (CSV)

IPD data will be available 6 months after publication of the first study results and for 10 years

Data will be accessible to external researchers, regulatory bodies, and authorized entities under the following conditions:

Formal request submission detailing the project and data usage. Access granted if the request meets ethical, scientific, and confidentiality criteria.