Suggest Treatment For Hallucinations In An Elderly Lady

I am a caregiver for a 96yr old lady she has been having hallucinations such as seeing bugs the bed moving the ceiling coming down the ceiling fan blades reaching out to us a man in the too voices she has been on clonzepam 1 in the am and 1 at night they ve cut her 1/2 in am and 1/2 in pm due to falls but she s been on them for years was wondering I tho could cause tho she is really confused about her whereabouts she s smart as a tack and no signs of dementia and drs have tested for it and they say no