sinusitis
"This is not the first time I have been on this medicine for recurrent sinus infections, I don't like it but it always seems to work. I am taking 2 500mg once per day. The disgusting taste in my mouth generally starts around day 2, and headaches around day 3. I can't sleep when I am taking it, but so far no other issues, I will be glad to stop taking it, 4 more days to go."