Mr. Sandoz Dilaudid

I have a memory of hearing Phil say this over the PA during one of the Dead's Egypt shows, but I have no idea if this was just a dream I dreamed, it happened at another show, something like this but not exactly like this happened, or something else.

Does this ring a bell to anyone?

update: 11/2/77 - Canada, not Egypt. After FOTM and before Estimated, https://archive.org/details/gd1977-11-02.mtx.chappell.sb23.86233.sbeok.flac16/gd77-11-02s2t07.flac at about 9:35

Would Mr. Sandoz Dilaudid please come to the backstage area?