Accumulation of mucous in the lungs is a symptom and not a diagnosis. A potent antibiotic such as Taxim-O (Cefixime) should only be used when a firm diagnosis of bacterial infection is made. Its side effects include liver damage, jaundice, kidney failure, fits and blood disorders (low white cell count), apart from the risk of development of bacterial resistance, reducing the efficacy of the antiboitic in the future. It is much safer to do steam inhalation with Sinarest Vapocap - put in the water, twice a day for a week or so.