Suggest Treatment For Recurring Allergy

Hi all , I am Punith from Bangalore, I am suffering from some kinda allergy from many months , so for every 4 days once or once in a week I need to take a tablet called OKACET , after taking that I vll feel good . I am continuing this from many months and now worried , please some one tell me what to do and the reason for getting that problem . Thanks Regards : Punith Kumar .V