Can you join the marines with asthma even if you pass the physical exam?

Answer 1

If you pass one of two tests

1) Methacholine Challenge

or

2) The physical test

you should qualify medically

but you should understand that these tests only come after making sure that you haven't had to use an inhaler for a while.

You can take tem but you probably want be passing if you have been needing to use an Asthma inhaler and the methochoine challenge could be potentially dangerous if you do have respiratory problems

Answer 2

Asthma is generally considered an instant disqualification if you have had episodes/symptoms past a certain age.