Believe it or not coughing is a good thing. It’s your body’s way of keeping the mucus from settling on your lungs. If you choose to take an over the counter cough medicine, it is best to use one with an expectorant that will help thin and clear the mucus as well. Be sure to also drink LOTS of fluids. Call your doctor if your cough lasts more than a couple days, worsens, is accompanied by fever, or gets better and returns.