a cough that has lasted that long needs to be assessed by a doctor. it could be many things including asthma allergies and even pneumonia or pertussis. children should rarely lose weight- this is concerning. your child needs to see a doctor right away so she can get on the right treatment plan. first one has to consider allergies. her cough may be a manifestation of an allergic response. those dark circles under her eyes could be "allergic shiners " often seen in allergies. another possibility would be back-to-back viral infections -- not uncommon with a social girl in school second although uncommon children can get sinusitis with constant post-nasal drainage. zithromax is not the best medication for sinusitis. third we are in the midst of a pertussis (whooping cough) epidemic (even if her cough is not the whooping sound). she may need to to be tested.
my 7-year-old has been coughing for six weeks and her 5 day z-pack didn't work. what will? . she has dark under-eye circles is losing weight and sometimes coughs until she vomits.