Sophie !MLHqI35Srs joined in and replied with this 11 years ago, 6 days later, 6 days after the original post[^][v]#618,928
Estrofem, progesterone and spironolactone (the latter's strictly an AA).
Or you can be an arse and take bicalutamide but, being a receptor-level and thus surface treatment rather than an actual testicular suppresser, that'll preserve intracranial testosterone, leaving you spazzy and negroidal.
Most actual truscum institutes use GnRH antagonists now, but that can be terrible for those averse to needles.