In this week’s column by Dr. Victor S. Sierpina: It is that time of year. Your nose is runny, your throat is sore, you are coughing, sneezing and are achy all over. Your appetite is poor, and you are tired and irritable. What to do? First off, don’t pick up the phone or go into your doctor to ask for an antibiotic. Not only do antibiotics not work for colds and flu, they have side effects and might increase the presence of drug-resistant bacteria.