I say, depends on what it is. Well, actually I agree, you should never have to borrow meds, your e-kit should be stocked with app. meds and it shouldn't be an issue, but if it was for a clondine for a bp 210/110 and the e kit was out and it was going to take 2 hours to get it and another patient had it..........I feel the risk of not giving a drug that is right there (and replacing it as soon as the other pts med comes in) would be bad.
If it was for a nexium that was a pharm rec that could wait, etc, no big deal, wait for it. Or even an ABT, 2 hours probably would be OK. Pain meds and BP drugs, nitro, etc, I don't think I'd wait.
Of course you can't "borrow" pain meds now, due to DEA regs, at least here in NC, so what I do is hound our back up pharm until the med is in my hands, lol. But pain is not life and death, not for an hour or so, although it shouldn't happen. BP in that range could be.