My mother, 62 years of age has been suffering from dementia and depression since 2016. She was prescribed dveniz, daxid for depression and admenta (bds), aricep (ods) for dementia since september, 2016. The disease has progressed albeit slowly. But there had been behavioral changes specially repetitive behaviour, frequent fits of aggression etc. Because of the increased aggressive tendencies, her doctor asked to stop antidepressants in january 2020. aggressive behavior dwindled down after that. However it increased a bit since december 2020. Due to unavailability of the previous psychiatrist we had to consult a separate psychiatrist in february, 2021. He started a new drug, olanzapine 2.5 (ods). My mother started taking the drug since february 10th. However she started getting quite drowsy from the middle of march. So we had to visit the doctor on march 26th. He asked to stop olanzapine 2.5 and continue with aricep and admenta. She was more or less fine till last tuesday, 6th april. But suddenly from 7th april there was a total change in everything. It's almost like she's spellbound! totally lost and not being able to do basic daily activities. It's almost like her brain has been switched off. She's walking slowly, not being able to eat/ drink on her own. And since yesterday she's having trouble using the toilet too. Not being able to pass urine or stools. Is this because of the drug olanzapine? If so, then can some other drug be used to negate these side effects of olanzapine?