1. Consultation Required: Before adding Sizodon Forte (Risperidone + Trihexyphenidyl) to your mother's regimen, consult her psychiatrist or treating doctor.

2. Medication Overlap: Sizodon Forte contains Trihexyphenidyl, which is also in Parkin. Using both may cause excessive anticholinergic effects.

3. Polypharmacy Risks: Combining Haloperidol, Risperidone, and anticholinergics can increase side effects like sedation, confusion, and cognitive issues.

4. Individualized Treatment: Medication changes should be based on her current symptoms, side effects, and health status.

Recommendation: Do not start or change medications without her healthcare provider's guidance. They can assess benefits, risks, and monitor for adverse effects.