Can Montec LC Be Taken For Life Time?

Am suffering from chronic allergic rhinosinusitis for the past ten years. am a dentist & am 22 now . started with Allegra and steroids and now on montec LC. My eosinophil count is three times the normal. i have three questions. 1,I WAS TAKING STEROIDS FOR THREE YEARS - DECDAN AND ALONG WITH IT ALLEGRA & AMOX NOT AS A COURSE BUT AS & WHEN I LIKED WHENEVER MY SYMPTOMS WORSENED, COULD THAT HAV LEAD TO THE WORSENING OF MY SYMPTOMS// COS AM HAVING SINUSITIS ,POSTNASAL DRIP & THROAT INFECTION &CHEST COLD DAILY NOWADAYS & DIAGNOSED WITH O M C BLOCK 2, AM FINE IF I TAKE ONE MONTEC LC DAILY CAN I TAKE IT LIFE LONG? ANY SIDE EFFECTS? RECENTLY ALREADY MY ENT TRIED A COURSE OF ANTIBIOTICS ANTIHISTAMINES & STEAM INHALING FOR PAST THREE MONTHS & ASKED ME TO GET SURGERY DONE COS MEDICATIONS DIDNT SEEM TO IMPROVE MY CONDITION SO I VE BEEN ASKED TO GO FOR SURGERY TO RELIEVE THE OMC BLOCK. BUT AM NOT WILLING FOR SURGERY SO CAN I JUST MANAGE BY TAKING MONTEC L C THE REST OF MY LIFE? ANY SIDE EFFECTS? 3, ANY CHANCES OF ANTIHISTAMINE CONSUMPTION HEALING MY DISEASE OR WILL IT BE JUST A SYMPTOMATIC RELIEF ?