The antibiotics you were given are reasonable initial treatments for prostatitis. However, some cases would require extended courses of treatment (sometimes months).
A transrectal ultrasound can be considered, as well as a rectal exam with analysis of any expressed prostatic fluid.
If the prostate is normal, a cystocopy can be considered to evaluate for any anatomical abnormalities of the lower GU tract (i.e. urethral strictures or polyps).
These options can be discussed with your personal urologist.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
kevinmd_