Finasteride or dutasteride. They control BPH perfectly, while also treating male pattern baldness. Combine with daily tadalafil to offset any chance of the dubious sexual side effects, while also reducing gynecomastia (it's also an aromatase inhibitor!). Make sure to have regular 5ari-aware PSA screenings to make sure high grade cancers are caught and you are golden.
fin/dut + tad are my favorite medications to keep men fresh for many more years than intended by nature.
Have your children before you start though, as dut will probably make you sterile eventually.
Tadalafil (Cialis) does not seem to do the same, however other potential side effects involving sight and hearing are listed.
I’ll ask my doctor if such a swap would be advisable.