Key takeaways
Premarin (conjugated estrogens) and Femring (estradiol acetate) are both estrogen replacement medications used to relieve menopausal symptoms like hot flashes and vaginal dryness. However, they differ in their forms and usage. Premarin is an oral tablet that can also treat low estrogen levels due other conditions and certain cancers in advanced stages, and to prevent osteoporosis, while Femring is a vaginal ring that primarily addresses menopausal symptoms. Premarin is taken daily or in cycles, whereas Femring is inserted into the vagina and replaced every three months. Premarin can cause weight gain, but this is not common with Femring. Both medications raise the risk of serious conditions like certain cancers and blood clots, but Femring may have milder side effects than oral estrogen pills like Premarin. Premarin is available only as a brand-name medication, while Femring is also brand-name only and might be more expensive.
