Since last 1 month , I am suffering from sneezing problem, When I get up in morning, sneeze every 10 to 15 min. sporadically feel heaviness in head any time in the day and start sneezing for hours while even seating in AC room at office or at home. Taking Allegra feels comfortable for next 48 hours but it again starts after that. My details as requested are Age 31, hgt = 5ft 6 , Wgt 61Kg