Nick Reiner was schizophrenic, and his new medication was making him “out of his head” in the weeks before he allegedly killed his dad, Hollywood legend Rob Reiner, and his mom, Michele, according to a report. The iconic director’s troubled middle child, 32, was being treated by a psychiatrist for his condition — but in the month before the murders, his behavior became “alarming” as doctors switched his medication, sources told TMZ. About three to four weeks before Rob Reiner and his wife were found stabbed to death in their Brentwood mansion, his prescription was altered, making him “erratic and...