I'm feeling difficulty in breathing always in this season.when it is humid.previously I used to take levomac 250 with Doxovent 400 and got relieved.but now a days after taking these medicines I feel severe giddiness hence I stopped but the problem persists. let me know please what to do.I think I developed Drug intolorence.Becoz even pain killers cause the dizziness since last six months so I'm frightend to take any medicine.pertinent to mention that i'm having blood thiner ,asprine multi vitamin and medicines for prostrate since so many years.I am 62yrs old.I regularly walk one hour and do mild exercise and pranayam for half hr.