How? How would he know he was poisoned and have time to tell his family before he died? How did he contact his family? Did the family get the body back?
There was a 911 call in San Diego where the wife of an auto shop owner realized that her husband had poisoned her. On the call, she was heard to say, "What did you put in my drink you bastard?". It was cyanide. She was dead before help could arrive. Hubby was convicted of murder. He's on death row.
Simplest idea would be Saddam used the same words to him as he used to someone else he had seen poisoned - then he got to his bag ( I'm sure he would not be able to bring something close enough to hurt Saddam, but they must have their personal papers, arms and communications at their quarters in the palaces ) grabbed his private cellphone ( the one bought on the black market instead of the government issue ) and phoned home.