I was on it but now am on estratest - combo of estrogen and progesterone. I had a full hysterectomy. Feel much better on this. I got it from the compound pharmacy after I took a saliva test. Go to hystersisters.com and go to the hormone jungle. They can answer just about anything on this subject.
That's right, my endocrinologist says it's bio-identical. There is a BIG difference between Estradiol and Premarin. Premarin gave me horrible side effects. With Estradiol, I have no side effects and feel great!