Is It Safe To Take Estrace Medicine To Reduce Menopause Symptoms?

I ve been taking estrace and medroxy to lessen my menopause symptoms. A friend who works in the medical field told me that using this medication only delays menopause and in fact when i stop taking it my symptoms will come back more severe. I suffer severe hot flashes and night sweats, vaginal dryness and severe itching among other symptoms when i dont take it. Can you give me some advise on whether I can safely restart my medication or if my friend is right and im only delaying the inevitable. Thanks Cindy