I've heard about this drug before and didn't realize until recently that it was the same as the drug most Transgendered individuals call simply "spiro." The feminizing effects of this drug are not listed here. As a MTF Transgenderist individual my self; that's how I initially found out about what "spiro" is. I did not however know Spironolactone was infact the "spirp" in question. To clarify transgenderist is a term used for individuals who want gender characteristic altering procedures short of Gender/sexual reassignment surgery(also known as a sex change, or "bottom surgery). I'd honestly like to know why; gynecomastia(benign breast enlargement), feminization in general, testicular atrophy, and sexual dysfunction consisting of loss of libido, and erectile dysfunction are not listed as side effects for men. Also why aren't menstrual irregularities and breast tenderness and enlargement listed as side effects for women?