A combination of mis-matched drugs/food could kill you and not be an overdose of any of them.
If Perper wasn't saying her temperature was 105 on Thursday, on what is he basing the accuracy of 105 as a prior (when?) temp?
Yes- re: drugs/food, of course the grapefruit in particular. I remember hospitals serving grapefruit juice years ago. You'd think they'd be careful with it knowing the risks with meds, but ....
As far as we know, Perper's just basing his 105 degree statement on what a number of people told him. He knows he can't vouch for it's absolute accuracy. It may, or may not, have anything to do with her death. He said it'll be explained further in his report.