Hello
You are having running nose,
sneezing, and asthma i.e. breathlessness ( mild degree) .
You are taking
singulair i.e
montelukast, most potent antihistamine .
With this drug your asthma is under control .
When such case visit I prescribe montelukast+ bambuterol combination , as this act as an antihistamine as well
bronchodilator .
In your case running nose, sneezing may be due to allergy as well
bronchoconstriction , so this combination will act as dual purpose.
Since this is a prescription drug ,so please consult your doctor .
However, bambuterol may cause fine tremors ,but need not to worry , these will remain only for first 4-5 days .
Hot coffee and steam inhalation will also provide relief.
Avoid , dust , mite, mold , pollen , fumes , sprays pests ,as these are predisposing factors for allergy and asthma.