Hello. I have gone through your question and understand your concern. Allergies can all the symptoms mentioned and in that case taking mucolytic syrup will not help. Few things that can be done to prevent dust and other nasal allergies is avoiding dusty areas or wearing a cotton mask when you clean, using natural fragrances like essential oils, avoid prolong exposure to trees and plants to prevent allergy from pollen. Use a daily dose of vitamin C supplement to boost your immunity. Allergy medication (anti histaminic) like cetrizine or levocetrizine (trade names Zyrtec 5mg or levocet 5mg) single dose a day when allergy symptoms are at high can be taken. Allergy medications can cause drowsiness, avoid driving or other activity that requires attention after the intake of drug. Single dose is enough and have to be taken only when symptoms occur. Hope your concern is answered. Thank you.