sinusitis
"I was prescribed 500mg of Clarithromycin for a week for severe sinusitis and a very sore throat. I'd had the sore throat for a week and it was getting worse. It started to clear up after a couple of days of taking these. Haven't noticed much effect for the sinusitis but haven't had any side effects except for really weird and vivid dreams. I woke up rather upset this morning! So they worked for me (especially as I am horribly allergic to amoxycillin) but I'll be glad when the horrible dreams go back to normal!"