Since it was Whitney's people who found her, it could be that they "cleaned" the room up of other drugs.
I can't say for sure because I was not there.
Whitney was clearly out of it before she died.
She probably had more than prescription drugs.
She may not have had illegal drugs the day she died because of the Grammy Awards party, but I'll bet this is a case of drug buildup in her body.
I am not a doctor, but Whitney Houston most likely died as a result of polypharmacy.
Too many drugs interacting in her system.
I don't know what caused her death, but the cause of the cause will be polypharmacy.
George Vreeland Hill