Tips or advice please?!?!

Flor • Pregnant with baby number 3 and can't wait!
So I have a 1 year old son with asthma every now and then his asthma will get bad but the problem is that he hates taking his asthma treatment everytime I pull the machine out he will run or if I'm holding him he'll scream and kick idk what to do he also can't drink anything he'll vomit everything (milk,juice,ect.) so my question to you mothers out there is has anyone else experience this? If so I would appreciate the help