Welcome to HCM Forum,
Schizo affective disorder is mix of mood swings along with restlessness
Basic chemical defect in this disorder is excess of dopamine
and dopaminergic antiparkinson drugs will increase dopamine so ultimately giving these medicine u going to give more trouble to him.
mentioned by you have various underlying reason - it could be a symptom of same illness specially result of psychosis which still to be corrected , could be side effect of ongoing medication which has its own kind of treatment.
So please you personally revisit to his psychiatrist
- convey him what problem and disturbances,concerns he is feeling - by knowing this he will definitely change medicine or add another one to get relief of this.
Remember this illness requires prolonged treatment and regular follow up with caregiver of patient.
Hope It Helps.Best regards.