This article describes a variety of studies Men Can Live 20 Years Longer... But There's A High Cost
That makes me wonder if puberty blockers and things like cyproterone acetate could lengthen lifespan with a pill.
Or, just possibly, an immunization that creates antibodies to testosterone.
This apparently lists sources, possibly without a prescription https://transit.org....t-internet.html
Also, as regard to sex, it is possible sex drugs, one of which is known as Foxy could be taken to restore or increase sex drive even with chemical castration. I think Foxy works on both men and women.