You PSA remains elevated despite antibiotics. Cystoscopy shows that the prostate was inflammed.
Possibilities include continued prostatitis, but with the continuing elevated PSA, I would make sure that cancer isn't present. Prostatitis can be notoriously difficult to treat and the resulting inflammation may be due to incomplete treatment.
To further evaluate whether cancer is present, you may want to fractionate the PSA into Free and Total PSA. However, with the continuing symptoms, I would push for a prostate biopsy. Checking the urine for cancer cells (known as urine cytology) is not enough.
I am not aware of marijuana affecting the PSA level.
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.
Thanks,
Kevin, M.D.