I would be amazed if they ever attempted to restrict the carrying of an Epi-pen. Anaphylactic shock can come on so suddenly by something completely unexpected -- such as a bee sting or unknown food allergin. The reaction time for this is minutes or less, and I'd hate to be the one who is supposed to rush someone's Epi-pen halfway across the park if a problem would occur. Based upon the experiences with my mother (who is a diabetic) I would say her symptoms are much more gradual, giving a person more time to return to first aid, etc. Either way, I again doubt that Disney would want to take the responsibility of holding a person's medications. The liability for them would, I suspect, be huge.