Drug Related Problem (DRP) is defined as an event that may potentially affect the health outcomes in the patients. DRPs can occur at all stages of the medication usage process starting from prescribing (included medication error and inappropriate prescription) to dispensing stage. Lack of follow-ups and reassessment of therapeutic outcomes may also contribute to DRPs. Pharmaceutical care is a co-operative activity in concert with other health care professionals and offered directly to the patient for improved quality use of medicines. Pharmaceutical care identifies and resolves actual or potential DRPs.

In our clinical practice, during the patient admission in internal medicine unit, a medication reconciliation process was conducted according to a validated protocol. The first step consists of getting the Best Possible Medication History (BPMH), defined as the most comprehensive list of all medications taken by the patient. The second step consists of comparing the BPMH with admission prescription made by the physician in charge. During pharmacist interview, pharmacist discussed about medication adherence and knowledge. The third step consists of characterizing, solving and documenting DRPs.

During the patient's hospitalization, the pharmacist participates at the medication prescription revision. At the discharge of hospitalization, a pharmaceutical standardised interview is carried out during which the pharmacist explains the modifications of treatments to the patient. During this interview, the hospital pharmacist updates the latest treatment changes. For patient with more than 65 years old and long-term affection (or patient with more than 75 years old with or without long-term affection) and 5 medications, the hospital pharmacist write a medication discharge report (MDR) to patient, community pharmacist and general practitioner.

For each medication, the investigators collected its name, dosage, dosage forms and frequency of administration. For each DRP, the investigators collected the type of DRP and the drug classes (according to anatomical therapeutic chemical classification system).

For each MDR, the investigators collected number of medication, number and type of DRP including inappropriate prescription.

Inclusion criteria:

- Patients aged above 18 years old, admitted to the medicine unit during the study period and hospitalized for at least 24 hours

Exclusion criteria:

- NA

Study population was composed of patient hospitalized in Montpellier University hospital.

NC