Oncology Questions? Ask an Oncologist for Answers ASAP
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clear phlegm is less worrisome for infection
this could be due to his antibiotic breaking up the infection
or his lung cancer irritating his lungs.
it is not short of an emergency
but if he is not sleeping well at night, he can ask his doctor for cough medications like codeine and guaifenesin or Tesselon Pearls.
as long has he has lung cancer in his lung, he could continue to cough.
he needs to ask his doctor for some stronger cough medications like I suggested above.