SBL Prostonum Drops (30ml)About Prostonum Drops Benign prostatic hyperplasia (BPH) is the most common problem in men after 50 years of age. BPH is estimated in 50% of men above 50 years of age & in 80% of men above 70 years of age. BPH can cause serious problems over time. Urine retention and strain on the bladder can lead to urinary tract infections, bladder or kidney damage, bladder stones, and incontinence. When BPH is diagnosed and checked in its earlier stages, there is a