Hi I am 29 years old, recently I was suggested by a dermatologist for my skin allergy with medicine, Terbest + Zyxal, since last three days I started this medicine, I feel tiredsome and drowsy with slight head ache, already I had cold since last week and now I have developed a heat boil inside my nose and I sleep for 6 - 7 hours daily as my routine, I want to know whether I can use any tablets for my cold now during this course, and does zyxal+terbest are the reason for my head ache, please let me know how to go about it.