Hi Nicola
Firstly welcome to the forum, it a great place to find information and support, although non of us wish we were here, your last statement regarding being positive is a good start. The biopsy will be required to complete the picture, and will tell how aggressive it may be, this will be stated by two numbers 3+3, 4+3 etc and when added together will give the Gleason score, the higher the figure the more aggressive, the staging will be signified by a T followed by a number and letter, the spread if any will be shown as N? for lymph node involvement, and M for bone involvement and both will be followed by a number, a zero being no involvement, mine was classed as PSA 94.4 T3b N0 M0 which means locally advanced but no spread. Once you have all these you will have a better idea where your father is, and what treatments are available. It would be a good idea to get the toolkit which is free from this site and maybe call the nurses on here who will try to answer your questions, the hormones will be to bring down the PSA. and starve the cells of testosterone which do have side effects for some, but vary in degree from person to person. The time between tests and results are the worst time, but as you say stay positive and follow up all results and appointments and either take notes or as I do record what is being said as at this time it's easy to mistake what is being said at the time as emotions often can cause confusion.
All the best
Roy