A clinical decision report using: Oelke M, Giuliano F, Mirone V, Xu L, Cox D, Viktrup L. Monotherapy with tadalafil or tamsulosin similarly improved lower urinary tract symptoms suggestive of benign prostatic hyperplasia in an international, randomized, parallel, placebo-controlled clinical trial. Eur Urol. 2012;61(5):917-925. https://doi.org/10.1016/j.eururo.2012.01.0131 for a vigorous 75-year-old man with benign prostatic hyperplasia (BPH) and erectile dysfunction (ED) who discontinued dutasteride due to intolerable sexual side effects.
Ibrahim et al. (Tue,) studied this question.