Epi pens aren't like taking an antihistamine and cracking on. Even with an epi pen, you can still die. It's not a bit of itching and a runny nose, it's imminent, impending death and the adrenaline in epi pens is intended to keep patients airways open and heart beating until they get to hospital and can have hardcore steroids on IV. Each one gives you 15-20 minutes to get to hospital. It's also unbelievably painful - my insides literally blister if I'm badly exposed. It's agony, for days and no painkiller touches it. It takes weeks to recover.
If you take an Epi pen you have to go straight to the hospital to be at least monitored in resus and get your steroids for 4-5 hours, and that's as a fit healthy adult. It's notoriously difficult to access resus departments with their skilled clinical staff and full complement of medications, as well as on call surgeons you may need for trachs, from a fucking plane in the sky.
I regularly have to get off buses and trains, or leave theatres, restaurants, bars etc because I'm having an airborne reaction. Bit more challenging to sit by an open window or hop off a plane.
People who think their snack choice trumps someone else's health are arseholes.
@Bookmonster123 It depends on the airline. BA are atrocious and won't take nuts off their food services. They also actually have no way to tell them about your allergies in advance - you can book vegetarian, vegan, kosher, halal or gluten free food but you can't tell them that you have a nut allergy. When you tell the staff when you board they will ask why you didn't tell them in advance DESPITE THERE BEING LITERALLY NO WAY TO DO SO. Even if I contact customer service in advance they just don't pass the info on. It's the most frustrating thing on earth. The most they'll do is let you board first to clean down the chair and table but they won't help you, or take nuts off their catering etc.
Easyjet and Ryanair are excellent. Will pull nuts from their catering, will make an announcement, will challenge anyone eating nuts for you and will help you clean down the chairs etc.
American airlines (Delta etc) as well as Air France get very stressed about liability but you can tell them in advance and they are also very good.
Quantas and Emirates act like they don't know what you're talking about. They also won't pull nuts from the catering and they won't tell you what's in the food, they did let me board early though.
Bring wipes, bring your own food, try to tell them in advance, ask GP for an extra set of epi pens for travel - if you think they'll be funny about this just ask for a repeat prescription and say you lost the last set. Get hold of liquid benadryl - it's the best one for dealing with a reaction starting I find and easier to skoosh in a kids mouth. I do take some preventative antihistamines about 30 min before boarding to just damp down any mild reactions.
I have travelled all over the world and my nut allergies are raging severe so it is possible to do so safely, and try not to worry excessively, although I know its difficult particularly when dickheads think their food trumps your childs life.