Thanks for your query,based on the facts that you have posted it appears that you had acute retention of urine due to enlarged Prostate
and further investigations have reveld that the size of your prostate is 77 gm which is significantly high .
Though you have been taking Flotral
D and has satisfactory urine flow it can be permanent solution for your problem .
Since you already had retention of urine once and the size of the prostate being large You need to undergo surgery of endoscopic resection of prostate (TURP).
This is a gold standard method of resecting prostate and practised world wide and gives satisfactory result that will help you to resolve your urinary symptoms and improve quality of life for rest of your life.