anti allergic tab montelucast is good for treating allergic cough as it is safest and no interference with any medicine
take montelucast 5 mg bd
you can take syp asthalin which is safe and is available every were and you can have it without any problem along with any other treatment for any other disease

hI ! As your mother is having slight wheezing, which may increase at any time, I as her treating doctor would have advised her an antiallegic cough syrup like Dilosyn, a broncho dilator like acebrophyllin, an anti histamine like cetrizine with montelukast, and regular nebulisation with budecort 1 mg twice a day and as the attack phases out, once a day preferably during bed time. As these drugs are prescription drugs, I would suggest you to discuss these with your family physician who may prescribe and explain you properly on the doses of these after examining you clinically. Wishing you an early recovery.