My Child Aaraiz Ali 15yrs Old Had Arachnoid Cyst Surgery

My child Aaraiz ali 15yrs old had arachnoid cyst surgery 20days ago. It was large 10cm frontotemporal cyst. He had symptoms of insomnia , self laughing, inattention , lack of concentration, restlessness before surgery. He was started Olanzapine2.5mg10days ago for his symptoms. For the first 06days he remained good , but after that he started self talking & having auditory hallucinations for 04 days. i,m worried about these new symptoms, Should i continue the olanzapine?