In the intervention group, the clinical pharmacist will apply the MALPIP criteria on all the admission and discharge medications. The pharmacists can access the full MALPIP list at https://sites.google.com/moh.gov.my/malpip/home.

The intervention will consist of 4 steps: i) pharmacist review using MALPIP criteria to detect PIM, ii) discussion with doctors for deprescribing decision iii) discussion with patients and documentation of shared decision iv) follow up patients at 6, 12, and 18 months.

Pharmacists will perform the reviewing and checking by themselves and discuss the suggestions with doctors during daily medical ward rounds. The attending doctors will decide whether to deprescribe based-on pharmacists suggestions. Then, the pharmacists will discuss the deprescribing proposal with the patients and record the decision.

In the control arm, pharmacists, patients and doctors are not purposefully blinded but are not aware of the intervention (i.e. the MALPIP tool). Designated pharmacist at the control sites identifies patients who match the eligibility requirements and enroll them into the trial after obtaining consent.

Patients in the control arm will receive routine care and support that they entitled to from the medical team and clinical pharmacists. Preadmission medication will be reconciled by a clinical pharmacist using the standard procedures, including medication history assessment form (CP1), pharmacotherapy review (CP2) and the clinical pharmacy report form (CP3).

In the intervention group, the clinical pharmacist will apply the MALPIP criteria on all the admission and discharge medications. The intervention will consist of 4 steps: i) pharmacist review using MALPIP criteria to detect PIM, ii) discussion with doctors for deprescribing decision iii) discussion with patients and documentation of shared decision iv) follow up patients