I have a problem of continuously running nose (transparent thick water & post nasal drip) keeps coming until I take cetrizine. If I keep on taking 1 cetrizine daily it will not come. Problem started from dec 2017, (never had any issue before that) after that I consulted ent and got nasal deviation correction (dns) surgery in feb 2018. But, problem persisted. After that I contacted at least 6-7 ent specialist but, nothing worked. Even tried homeopathy for 4-5 months but, no effect. Some doctor says I have allergic rhinitis (but ige remains below 150), some says sinusitis (but, no pressure in forehead ever felt) also done pns waters x-ray everything is clear. Their is no special triggers like dalia, mitti. If I stop cetrizine / mucinac nose start running very next day. I stay mostly indoors in ac environment. Outside at max 1 hr while travelling.