<s>[INST] hi i am 51 years old man with diabetes on glucophage 500, i was doing PSA regularly since 2 years and in august 2013 it raised from 2.9 to 4.7 my treating doctor said it is mostly prostatitis and i was given course of antibiotic once and then after 3 months and my PSA dropped to 3.6 after the course and then raised to 4.7 each time and it still ranging between these 2 figures is this normal? [/INST] HelloThanks for query. You have been monitoring your PSA levels regularly. You have your PSA raised to 4.7 which got normalized after taking antibiotics. This could be mostly due to infection of Prostate (Prostatitis). Normal value of PSA is 1-4 ng. There is abroad understanding that persistent raised level of PSA above value of 4 NG in a man after the age of 45 years should be suspected to be due to cancer of the prostate unless proved otherwise by biopsy of Prostate As you have prostatitis it is slightly raised to 4.7 NG.However, I would suggest you to consult qualified Urologist for clinical and digital rectal examination to rule out presence of any hard nodule in prostate. He may ask for ultrasound guided biopsy of the prostate to rule out cancer of the prostate. Chat Doctor.  </s>