Compare Prempro vs. estradiol / norethindrone

Head-to-head comparisons of medication uses, side effects, ratings, and more.

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Relieves menopause symptoms and lowers your risk of osteoporosis.

Activella (estradiol / norethindrone) helps relieve menopausal symptoms and prevent bone loss. There can be many side effects, so it's important to talk to your doctor about the benefits and potential hassles of this drug before using it.

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  • Replaces estrogen in your entire body and relieves multiple symptoms of menopause.
  • Lowers your risk of fractures by keeping your bones healthy.
  • Improves mood, energy, and mental alertness for some people.
  • Generic available, so cost is usually lower.
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  • More potential side effects since Activella (estradiol / norethindrone) exposes your whole body to two hormones.
  • Raises your risk of developing a stroke and blood clots.
  • You may get irregular bleeding and spotting that can last a few months to a year.
  • Should only use if you still have a uterus.
Used for
  • Menopause - Moderate to severe abnormal vasomotor function Menopause - Moderate to severe vaginal atrophy - Moderate to severe vulvar atrophy Postmenopausal osteoporosis
  • In women with an intact uterus; Prophylaxis
  • Hot flashes
  • Vaginal dryness and inflammation
  • Prevention of postmenopausal osteoporosis
Dosage forms
  • Pill
  • Pill
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Side effects
The Prempro (Conjugated Estrogens / Medroxyprogesterone Acetate) FDA package insert doesn’t have numbers about how common side effects are.
10possible side effects
  • Breast pain
  • Headache
  • Nausea
  • Upper airway infection
  • Post-menopausal bleeding
  • Sinus infection
  • Ovarian cyst
  • Back pain
  • Difficulty sleeping
  • Accidental injury
See more detailed side effects
Risks and risk factors
No information currently available
  • Endometrial cancer
    • Using estrogen for more than 1 year
  • Breast cancer
    • Personal or family history of breast cancer
    • Using estrogen for more than one year
  • Increased risk of blood clots and stroke
    • Personal or family history of blood clots
    • High blood pressure
    • Smoking
    • Obesity
    • High cholesterol
    • Systemic lupus erythematosus (SLE)
  • Dementia
    • Age 65 or older
  • Pancreas swelling (pancreatitis)
    • History of high triglycerides
See more detailed risks and warnings