Is it safe to take vit. C & vit. E 400iu with provera (medroxyprogesterone)? Are these vitamins good antioxidants?

Yes, but... Yes, it is safe to take vitamins c ; e with provera (medroxyprogesterone). They are good antioxidants but it is important to take natural e (d-alpha tocopherol, not dl-alpha) ideally with mixed tocopherols; studies suggest synthetic e is hazardous. Also, i feel natural Progesterone is a far better choice than provera (medroxyprogesterone), a synthetic drug with more side effects and no clear advantages over progesterone.