sinusitis
"I have chronic sinusitis, so I usually treat it with nasal/sinus rinses (saline) and good basic hygiene. But occasionally it gets bad and stays bad for 7 or more days, in which case a run of antibiotics always helps. I use the one-pill-a-day-for-three-days Azithromycin, as it always works and is most convenient. No side effects, and I usually start feeling better after the second day. I try to avoid doing this too often, as I'm aware of bacterial resistance issues. I've learned over the years to know the difference between allergies, colds and bacterial infection, so I don't overuse or abuse the antibiotic. I've never had the diarrhea or stomach cramping described by some."