Hello Pete,
I’ve only just joined this site following my very quick diagnosis, multiple tests and finally 10th April, having the prostate taken out. There is nothing to prepare for the biopsy. It is about a 30 minute session, normally taking out a dozen “slivers” of the gland for examination. Whilst it is definitely uncomfortable, it is nothing to be feared. You will have an injection or even two. In my case, the consultant was so nice and caring.
You may have some slight bleeding in your motions that night and feel marginally uncomfortable, but by the next day I was fine.
Hope that helps
Jes