My DS (18) has a nut allergy (brazils and walnuts). We were told at the hospital that his brazil allergy was the worst they had seen based on skin test. He's never actually had anaphylaxis - he was given a walnut, spat it out and his lips and face swelled up which is what led to the testing. Yesterday, he was on a train and a man got on eating brazil nuts. DS ended up having to get off at the next station with anaphylactic symptoms - shortness of breath, pins and needles on his face, feeling dizzy, etc. He took an antihistamine and slowly recovered. He caught another train and was fine by the time he got home. I phoned the NHS helpline who told me to monitor him and phone back if necessary. I phoned the doctor's surgery and they told me to take him to A&E. He was actually totally fine when he got back so I didn't do anything. I'm just wondering what the protocol in these situations should be and if he could have gone on to have more serious reactions later in the evening. A friend suggested he should have had more antihistamine and monitoring at the hospital. He had an EpiPen with him but I don't know at what point that should be used? I presume when breathing becomes really difficult. Should he have had an inhaler with him? Is there anything else he could have taken - something in between an EpiPen and antihistamine tablet? Thanks for any advice you can give us.