Why buy this ?
 You ought to take your body temperature daily during an infection by the viruses that cause a common cold.  Common colds usually do not enhance body temperature, but bacterial infections and flu viruses do.  If you have a sustained high body temperature, you should immediately consult a physician and that doctor can then get you an antibiotic, or medicine for the flu, that will most often cure the infections.  However, if these kinds of infections go unchecked they can develop into a disease that can be fatal (e.g., diseases of the lungs).  Products claiming in their advertisements to be medicines for treating flu are not prudent.  If you have a high temperature, the supposed medicines for a common cold will not cure a progression of flu virus.