Common cold- as the name suggests is one of the most common illnesses affecting humans. The average adult has about 2-3 cold episodes per year. The symptoms include a stuffy, runny nose, sore throat and cough.
It is usually caused by viruses and cannot be treated by antibiotics which are only effective against bacterial infections. So, taking antibiotics for a cold is actually unnecessary and to be simply put- a waste.
Using antibiotics when not necessary can be harmful by causing bacterial resistance. What this implies is that these antibiotics may not work when you really need them to battle a serious bacterial infection.
Common cold usually resolves on its own after a few days. Medication may be necessary to provide symptomatic relief but this does not include antibiotics.