I do not know the answer to that question, but if you want alternative drug delivery forms for estrogen replacement therapy consider looking for a compounding pharmacy. They offer creams you can rub once a day on your wrist for therapy, vaginal suppositories, and more... If you are interested you can visit our website for more information on pharmacy compounding.
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.
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