Thank you for your query.
can give rise to vomitings and you may feel light in case you are getting dehydrated. I suggest that you drink a lot of fluids so that you do not get dehydrated.
I did not understand your problem of inhaler. If you are asthmatic and are on an inhaler then you should not discontinue it on your own. Probably taking the inhaler may help you in getting a good sleep and help in your headache.
I hope I have answered your query to your satisfaction.
Wishing you an early recovery.
Rajiv K Khandelwal