It has only been out since 2002. I know for certain that I do not want to go back on a form of hormones. I was on Depo
Provera for right at 9 years. The side effects, most I didn't even realize I had until going off (I guess since I had used it for so long), were just awful. The plus side, I don't remember having a period after the first year. I had some slight spotting occasionally, maybe once or twice a year, but that was it. I don't want to do that again.