My mother suddenly starts coughing at night since past few days it's continuously ...I think it's kind of cough attack and it's dry cough ...she struggles for 15-20 mins and drink some hot chai or take cloves to cure it ...this is her Longterm problem which happens usually at night ...she also have some kind of asthma when she was teenager but not she don't have that problem ... Is there any mouth spray which you can recommend for her to stop such sudden cough attacks or to get relief from such attacks Ps: we live in Delhi and maybe she also gets it due to pollution