I have always had a problem with erythromycin, ringing in my ears, I also have active recurrence of my breast cancer. The Dr. put me on Azithromycin, after I told him that I could not taqke erythromycin, I have lost all hearing, the only thing I can hear is my heart beating through my ear drum. This is a new Dr. in a remote area and it is snowing heavily. I will be 70 in March. I have chronic sinusitis and cycst in my sinuses, per MRI 2003. I have always taken Augmentin XR in the past. I got a prescription of amoxicillin/clavulan, 875-125 , and the manufacturer was NR which I could not find, but pharmacy said was manufactured in Croatia, it had multiple X on the oblong tablet, and made hearing worse., I requested that I get an American Co., and really wanted Augumentin XR, which I could tolerate in the past. I was told that he could only get Sandoz generic from Austria, when I went to get, today, the Manufacturer is listed as LK. I was told that it would cost me $1500.00 for 20 Augmentin XR. I also have a respiratory infection. I was trying to discover who this LK manufacturer is. Why can t AQmerica make Amoxicillin anymore? Does it make penicillin, and if either, tell whom. I have had several bouts of pneumonia in my lifetime. I am afraid to take this new medicine without knowing who the manufacturer is. Thank you for your help. I have Medicare and AARP United Healthcare PDP and Supplement F