Although for an OD, if you had nothing but an Epi-Pen nearby, it would be better than nothing. It could possibly help. We know stimulants help with respiratory

Although for an OD, if you had nothing but an Epi-Pen nearby, it would be better than nothing. It could possibly help. We know stimulants help with respiratory depression. I don’t think an opiate antagonist could be helpful for anaphylaxis though.