Prescribing antibiotics for patients with discoloured phlegm caused by acute cough has little or no effect on alleviating symptoms and recovery, a Cardiff University study has found.
Acute cough is one of the common reasons why people visit their GP and accounts for a large proportion of antibiotics prescribed in the community. One of the most common questions asked by GPs to their patients is about their phlegm: "Are you coughing anything up?" or "What colour is your phlegm?"