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Compare Activella vs. Prefest

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

Key takeaways

Activella (estradiol/norethindrone) and Prefest (estradiol/norgestimate) are both combination medications used to treat menopausal symptoms and prevent bone loss. Activella is available in both brand and generic forms, while Prefest is only available as a brand-name medication, which might make it more expensive. Activella is taken as a single tablet daily, whereas Prefest requires you to alternate between two different colored tablets every three days, which can be confusing. Both medications contain an estrogen and a progestin, but the specific progestins differ: Activella uses norethindrone, and Prefest uses norgestimate. Neither medication is recommended as a first-choice for preventing osteoporosis due to its higher risk of serious side effects like breast cancer and blood clots. Both medications share similar risks, including blood clots, heart attacks, strokes, and certain cancers, as well as more common side effects like headaches and cold-like symptoms.

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