Is Prometrium The Same Thing As Progesterone?
In our latest question and answer, our pharmacist discusses whether or not Prometrium is the same thing as progesterone.
Hi, my question is the following: Are Prometrium and progesterone the same medication? Thank you in advance.
Answered by Dr. Brian Staiger, PharmD
Medical Content Reviewed By HelloPharmacist Staff
Last updated Jun 03, 2023
- Prometrium is a brand-name product that contains micronized progesterone.
- Prometrium is, therefore, the 'same' as progesterone. It is formulated as 'micronized progesterone' to improve absorption and overall effectiveness.
Yes, Prometrium and progesterone are the same in the sense that Prometrium is a brand-name product that contains micronized progesterone. Prometrium's micronized progesterone is structurally the same as the progesterone produced by the human ovary, meaning that it is 'bioidentical'. It is not synthetic.
As mentioned, Prometrium is a brand name, and it is available generically as 'progesterone'. Both the brand Prometrium and generic progesterone are available in 100mg and 200mg capsules.
The 'micronized' part of 'micronized progesterone' is simply referring to how the drug is formulated.
Progesterone is micronized to increase its absorption and effectiveness in the body. When progesterone is micronized, it is broken down into smaller particles, which allows it to be better absorbed by the body when taken orally. This can increase the hormone's effectiveness and reduce the amount needed for treatment.
Other Forms Of Progesterone
Since you're asking about progesterone, I think it's worth pointing out that there are other drugs on the market that are classified as 'progestins'. A 'progestin' is a synthetic compound that is chemically similar to the naturally occurring hormone progesterone. Progestins are designed to have similar effects as progesterone in the body.
However, progestins may have additional effects and can be modified to have different properties, such as a longer half-life or greater potency.
The most commonly used 'progestin' is medroxyprogesterone. Technically, it is not progesterone but has progesterone-like effects.
This answer isn't intended to get into all the differences between progesterone and medroxyprogesterone, but I will say that progesterone is a natural hormone that is the same as the progesterone produced in a woman's ovaries. It is often preferred over the synthetic progestin, medroxyprogesterone, because it has fewer side effects.
For example, medroxyprogesterone has been linked to increased risks of heart disease and breast cancer. Micronized progesterone, on the other hand, does not seem to have these risks but there is still somewhat limited information available on the safety of these hormones overall.
I hope this answer helped! Reach back out anytime.
- Dr. Brian Staiger, PharmD
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