LOS ANGELES –– Sage Stallone had major dental surgery two weeks before he was found dead at home, according to his mother, who said she warned her son against having five teeth pulled on the same day. “I told him not to do that. I've heard about people dying having multiple procedures done to your mouth. Do not have more than one tooth [pulled]," Sasha Czack told the New York Post on Monday.Czack suggested to the Post that it was possible her son was taking painkillers following surgery. The 36-year-old actor, writer and producer was found Friday afternoon by his housekeeper. An autopsy was conducted over the weekend. the coroner's office said, but cause of death has not been determined pending results of toxicology and other tests.Coroner's staff removed some prescription drugs from Stallone's home Friday afternoon, The Times reported. –– Agencies