my daughter is 14 weighs possibly 80 lbs and has no allergies or medical conditions. she works with kids and seems to catch colds frequently .. my question is this can she mix COLD FX with a decongestant and is therw a brand that you can recommend that is highly effective ie... Buckleys, Advil, Tylenol, Day/Night Qil ??? Her symptoms are stuffy nose, sore throat, sometimes headaches from congestion