bacterial infection
"It took about 5 days to really start working, but then I really felt much better. For a few nights when I lay down I would cough , but that was because  it was clearing up . I had been sick for almost 3 months with a sinus infection and other  antibiotics did not help. I did have some sore tendons but not too bad. For sinus infections it's excellent. I took 500 milligrams for 10 days. 2/12/2017"