FrankenFretter, I was antibiotics for four weeks with my problems of the constant ringing in the left ear, the fluid behind the drum hasn't gone away completely and neither has the ringing. I'm not really into taking a lot of medication and since my fluid was behind the drums the Doctor advised me that ear drops are useless. He did say that blood pressure can make the problem worse and I have noticed that it was worse this week when I was really in a stressed out situation.