IBE has consistently stressed AM dosing for Oratropin.
I think this makes sense because Oratopin is exogenous IGF-1; taking it in the AM means it's less likely to affect endogenous IGF-1 release - which occurs roughly 90 minutes after falling asleep.
PM dosing OTOH would seem most likely to suppress your own GH-release rhythms. It's also true that the "cell-mediated", semi-time-release delivery system makes it difficult to predict . Heck, it may be, given the 24-48 hour release period, that only the timing of the initial dose matters (welcome to the wonderful world of research!)....
more notes: I don't think it matters what you eat or drink before (assuming they're food, beverage, that sort of thing), but to do it while you've got that stuff spread around in your mouth would be stupid: it takes an hour to absorb, and it needs to stay on the oral/pharyngeal mucosa, relatively undisturbed, during that hour. eating & drinking would scrape it off & wash it down & out.
What to eat after that hour? Up to you: see what you feel like, I guess.