If the cough and phlegm are caused by cold, flu or acute bronchitis, it is usually a viral infection, so it is not necessary to take anti-inflammatory drugs. If the cough and phlegm are caused by infectious diseases such as pneumonia, bronchiectasis, lung abscess, etc., oral anti-inflammatory drugs such as cephalosporins or cefdinir are needed. You can also take respiratory quinolone drugs, like moxifloxacin hydrochloride or levofloxacin hydrochloride. During the period of coughing and phlegm it is also important to drink plenty of water and eat a light diet with easily digestible foods.