hi, how long is duration of your symptoms? if more than 3 months, it is chronic prostatitis. amikacin not frequently used for chronic prostatitis (penetration into prostate tissue is poor). but it will clear the urine infection. Cifran will take care of prostatic infection, but 1.5 months for acute and 2-2.5 months for chronic prostatitis. repeat tests and culture after course of treatment. good luck.