I have been on Evista for years. My weight has steadily inched up. I can only maintain my weight at 900 calories/day. Anything more, and up I go.
When I ran out of Evista, and had to wait a month to see my ob/gyn, I started to notice I was no longer hungry all the time.
As to the question of osteoporosis. I have both osteoporosis and osteopenia. I can't prove a negative. If I hadn't taken Evista, would my osteoporosis gotten worse? Who knows? I have no baseline to compare against.
Aside: Interesting comment about dark skin spots. I thought my freckles were just getting darker from old age.