I am not sure why Siterone recommends decreasing the dose over time rather than just stopping at some point. Maybe it encourages more sales as meds are still necessary when weaning the patient.

Anyway I was on Siterone and Depo Provera for quite some time and when my urologist finally said he would castrate me, I immediately stopped taking all and had no discernable effects so my experience is similar that way to River's.