Okay-- discussed with allergist this morning.
His strategy is:
a) carry PLENTY of extra epinephrine (so we'll start building up our stock now)
b) pre-load with not only regular meds (Zyrtec, high-dose) but also with Singulair about a week before the trip and continue to dose with it during the trip,
c) carry H1/H2 blocking antihistamines (benadryl)
d) carry H1 blocking-- Zantac or equivalent
e) carry liquid prednisone (just in case)
f) carry inhaled steroid-combo (LABA-Steroid)
g) rescue inhaler-- albuterol
Yes, this is a large amount of pharmacology. Most of it is 'just in case.'
He also pointed out that pharmacy practice in the EU differs significantly from that in North America-- pharmacists in the EU have some dispensing privilege that north American ones don't. My feeling is that this probably stems from a historical apothecary practice which underpins pharmacy in European nations. Anyway. He said that in his experience, some drugs can be gotten 'behind the counter' from a sympathetic pharmacist even without an Rx but with a good explanation of need, but that we probably shouldn't count on it.
S&S, we probably would never fly Delta just because they spent so many years serving SO many peanuts that the planes themselves are likely to be wayyyyyy, WAY beyond unsafe for DD with her level of sensitivity.
Allergist confirmed that we will preboard and wipe-down, long sleeves, not eat anything served onboard, etc. That is pretty much a given at DD's level of sensitivity.