There is currently no generic Estring approved in the United States. Although all of the patents for the medication have expired, no generic versions are expected to become available any time soon. There may be companies out there claiming to sell generic Estring; however, these products may be fake, substandard, and potentially dangerous.
Generic Estring: An OverviewEstring® (estradiol vaginal ring) is a prescription hormone replacement medication used to treat vaginal menopause symptoms, such as vaginal dryness, itching, or burning, and urinary menopause symptoms, including painful or urgent urination. Estring is a small, flexible ring that is inserted vaginally and left in place for up to 90 days.
Estring is made by Pfizer, Inc. There are currently no generic versions of the drug approved in the United States. However, if you search the Internet for "generic Estring," you may find a number of companies selling it or claiming to sell it. The fact is that these medicines may be fake, substandard, and potentially dangerous. Generic Estring may be available from another country, but there is really no way of knowing whether you are getting genuine Estring. Therefore, you should not buy any generic Estring until there is an approved generic version available.