My father is 72 years old (COPD stage III). Fever is a common phenomenon for him if he stop antibiotic for few days. Now some of them don’t work. One of my doctor said one day these antibiotics will not work. Levoxin works well for him but it weaken his leg badly. His cough contains bad odor and frothy secretion occur before starting fever. Now he taking cefuroxim 500mg two times a day. - S