The prostate gland will not absorb anything except sulfur.
So, all those antibiotics only help temporarilly. The only cure is Bactrim, which is made of sulfur. Find a doc your age and he will tell you this, or go to any other country and they will prescribe Bactrim, take one a day for 30 days.
If you can't get a prescription, try drinking epsom salts, it's sulfur, the dosage is on the box, you'll find at any grocery store. An EMT fireman told me this should work, but we haven't tried it on anyone, it won't hurt you anyway.