My Husband Was Prescribed Tamulosin By An Emergency Department MD

My husband was prescribed Tamulosin by an emergency department MD for urinary retension as a side effect of the pain medication Nucynta. He has taken 3 of a 5 day supply. It relieved his symptoms and he is no longer taking Nucynta but is on Lortab for his pain after extensive shoulder surgery 10 days ago . Does he need to see a urologist to continue on the Tamulosin? He had not been diagnosed with BHP before. Thank you