Hello
As you mentioned that you are using inhalers and this is not working this time for severe cough.
Cough is so severe that sometimes you vomits in the night .
May be due to these possibilities ,these include:
1
Tuberculosis , as this is most common cause of
prolonged cough particularly in an asthmatic patient . Since this cough is not responding to your inhaler , so this is a cause of concern.
Diagnosis can be confirmed by X RAY chest , sputum for A F B and blood for C B C and ESR.
2
Bronchiectasis , copious amount of mucus usually associated with cough and nausea and
vomiting.Diagnosis can be confirmed by sputum for culture and X RAY chest.
3 Since this cough is not responding to ordinary inhaler so change the inhaler . When such patient visit I prescribe them to take montelukast+ bambuterol tablet once or twice in day .
Also take codeine +
chlorpheniramine maleate cought syrup ( habit forming drug but very effective ).
This is a prescription drug so consult your doctor and get a prescription .
Deal as mentioned above.
Good luck.