Recommended Replacement Schedule for Estring
Estring, a vaginal ring containing estradiol for treating moderate to severe vaginal atrophy due to menopause, is designed for continuous use over 90 days. Replace it with a new ring every 3 months (approximately 12 weeks).[1][2]
How to Insert and Replace It
Insert the flexible ring into the upper vagina yourself, similar to inserting a tampon, and leave it in place continuously. It releases a low, steady dose of estradiol locally. After 90 days, remove the old ring and insert a new one on the same day. If it falls out, rinse it with warm water and reinsert; replace if damaged or left out longer than 2 hours.[1][3]
What If Treatment Needs Adjusting?
Most women use it for 3 months at a time, but your doctor may recommend a different schedule based on symptoms or response. Continuous use is typical without breaks, unlike some oral hormone therapies. Do not use beyond 90 days per ring to maintain effectiveness.[2]
Common Reasons for Early Replacement
Replace sooner if the ring breaks, slips out repeatedly, causes irritation, or if you develop an infection. Uterine bleeding or other side effects warrant immediate doctor consultation and potential removal.[1][3]
Who Should Avoid Estring?
Not for those with undiagnosed vaginal bleeding, breast cancer history, blood clots, liver disease, or pregnancy. Discuss risks like endometrial hyperplasia (if no progestin) with your provider.[2]
[1] - Estring Prescribing Information (Pfizer)
[2] - FDA Label for Estring
[3] - Drugs.com Estring Patient Guide