I hope he's better now and you were ok the other night. I was just thinking that you might find it helpful to contact the asthma society (foundation?). They offer a FREE service where the asthma nurse will come to your house and discuss things like triggers, relief, correct meds delivery, when to seek medical help etc. I haven't personally used the service but I have emailed them with queries and they've been really good replies. Others on here have used them.
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DS1 Feb 02; DS2 Oct 04; DS3 June 07
Food & environmental allergies, eczema,
anaphylaxis, hayfever, food chemical intolerance and asthma.
Treat the earth well: it was not given to you by your parents,
it was loaned to you by your children. ~ Ancient Indian Proverb