The clinical pharmacists present in the hospitalisation units aim to ensure the daily review of the drug prescriptions of hospitalized patients.

In order to optimize their work, the objective of this study would be to provide them with a clinical decision support tool via artificial intelligence in order to improve the patient's medication management. This study will test the Pharmaclass® software.

Inclusion Criteria:

• Hospitalized patient entering the SU06 or SU13 geriatrics unit of the Paul Brien site of the CHU Brugmann Hospital between November 16 2021 and April 15, 2022
• Speaking French and/or Dutch
• With chronic renal failure or taking at least one medicine for diabetes, heart, COPD, asthma, high blood pressure, epilepsy, atrial fibrillation, osteoporosis, high cholesterol, pain, parkinsonism, blood clotting, constipation, thyroid, depression, benign prostatic hypertrophy, gastric ulcer, Alzheimer's disease, cirrhosis as well as for electrolyte disorders (hypo or hypernatremia / potassium / calcium/magnesemia/phosphatemia).

Exclusion Criteria:

• Patient who died or was transferred to another care unit during his/her hospitalization

Hospitalized patient entering the SU06 or SU13 geriatrics unit of the Paul Brien site of the CHU Brugmann Hospital between November 16 2021 and April 15, 2022