Menopause Home > Generic Prometrium

The patents for Prometrium (progesterone capsules) have expired, and it is now possible to buy the medication in generic form. The generic capsules come in two strengths and are made by various manufacturers. All of the generic versions have been assigned an "AB" rating by the FDA; this means they are considered equivalent to the brand-name drug.

Generic Prometrium: An Overview

Prometrium® (progesterone capsules) is a hormone replacement therapy medication that is approved for the following uses:
  • Causing a period in premenopausal women with absent menstrual periods (secondary amenorrhea)
  • Preventing abnormal overgrowth of the lining of the uterus (endometrial hyperplasia) in postmenopausal women taking estrogen hormone therapy.
Brand-name Prometrium is made by Solvay Pharmaceuticals. However, the patents for this medication have expired, and the drug is now available in generic form.

Availability of Generic Prometrium

Generic Prometrium capsules come in the following strengths:
  • Progesterone 100 mg
  • Progesterone 200 mg.
They are made by various manufacturers, such as:
  • Teva Pharmaceuticals USA, Inc.
  • Watson Pharmaceuticals, Inc.
The version sold by Watson is actually an "authorized generic." This means that it is actually the real, brand-name capsules that have been sold to the generic supplier, relabeled, and sold as a generic.

Is Generic Progesterone as Good as Prometrium?

All generic medications must undergo certain tests to compare them to brand-name medications. The U.S. Food and Drug Administration (FDA) then looks at these tests to decide if the generics are equivalent to the brand-name medications and assigns a rating to each one.
An "AB" rating means that the FDA has determined that a generic medication is equivalent to a brand-name medication. The generic versions of Prometrium currently available have an "AB" rating, meaning they should be equivalent to Prometrium.
However, generic medications are allowed to have different inactive ingredients than the brand-name medication. This might include fillers, dyes, or other ingredients that may cause problems for people with allergies or sensitivities.
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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