pneumonia
"I was sick for a year, A YEAR, coughing up sticky yellow mucus relentlessly.  I was put on 4 allergy medications, acid reflux medicine, and put through voice therapy (it was making me gag) and multiple other specialist visits.  They thought I had asthma.  Nope.  After multiple antibiotic tries, my ENT put me on this one and it cleared within two weeks.  No more problems.  Yes, it tastes like I ate a pile of crap, but worth it.  So worth it."