my dad was released from the hospital yesterday, had pneumonia, I visited him last night and he was normal mentally. I know he was started on some new medications. He can't walk, going on 4 years now, he's in a nursing home, and I was called this morning, they informed me he fell out of bed. I discussed his medications, he's on some new ones since yesterday, and now he's hallucinating and can't go to sleep-I checked online and there are many moderate interactions and 2 major interactions-the doctor told the nursing home staff he didn't see any possible problems with medication but drug interaction checker shows there are serious concerns. what should I do?