Hello
Since you are having cough with green ( black also ) mucus or phlegm from last 2 weeks and in spite of
erythromycin don't got relief .
Now you are also having pain in stomach , I want to tell you that stomach pain is due to
gastritis caused by cough and antibiotics used.
For this take antacid syrup ( this will be sufficient).
Now main question is you received this treatment over phone ( in complete history ).
This type of symptoms may be due to these reasons, these includes.
1 Asthmatic allergic
bronchitis , as this is most common cause . Patient develops cough , whistling sound , difficult breathing , watery eyes , itching in nose & over face. When such type of patient visit I usually prescribe them monteleukast+ bambuterole tablet once or twice in day till complete relief .
2
Bronchiectasis may the next reason . Get in XRAY chest and sputum examination.
Other most common causes are
pneumonitis ( x RAY chest ) ,
lung abscess ( X ray chest0,
tuberculosis ( sputum & x RAY examination).
Antibiotics not working ? asked by you .
I would like to say that these symptoms are from long duration so please consult a physician and get his opinion.