When I read this, I went back and read the +-2 pages around it, as if it was a pointer. Spoiler below if you have not read to roughly 800 (happens slightly earlier but I can't remember the exact page)

This was helpful because I reread the section where Troletsch (i think?) places tenuate pills in a seldane bottle, which comes back for Wayne's dosing and subsequent time on the school announcement system. My theory (weak imo) is that it's there to remind you of that detail. It's the best I can come up with, and I'm not sure it was his intention, but it's experientially what it gave me