SIR,I AM SUFFERING FROM COUGH FOR 15 YEARS .I AM 52 YEARS OLD MALE HAVING WT 60 KG AND HT 5 6. I HAVE TO SPITUP EVERY AN HOUR,ALSO I HAVE TO WAKEUP EVERY MORNING BY 4AM,5AM, AND 6AM TO CLEAR MY THROAT.MY VOICE ALWAYS BREAKS AFTER TALKING FOR HALF AN HOUR. I AM STAYING IN AIR POLUTED AREA.I NEVER SMOKE.