I am 63 yrs. old and started taking prempro (conjugated estrogens and medroxyprogesterone). i feel better, but is it harmfull?

Maybe.: Prempro (conjugated estrogens and medroxyprogesterone) is not evil. It simply raises your risk of certain events such as blood clots and cancers. The absolute increase in risk is small. Unless you have factor v leiden or smoke. If you really do feel a good benefit on the med, it seems the balance would be to continue the medication. However, you would want to cut back to the lowest effective dose. Maybe one tab every other day or so...