No. Compounded hormones and bioidentical hormones are not the same thing, although a hormone medication can be both.
Bioidentical hormones have the same chemical and molecular structure as the hormones that your body produces naturally. Estradiol and micronized progesterone are common examples.
Compounded hormones are medications prepared individually by a compounding pharmacy according to a prescription, typically when an FDA-approved product doesn’t provide the dosage, formulation, or ingredients a specific patient needs.
A hormone treatment can be bioidentical, compounded, both, or neither. Bioidentical does not mean compounded, and compounded does not imply safer or more effective.
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Understanding Bioidentical Hormones
“Bioidentical” describes the hormone itself, not how or where it’s made. Bioidentical hormones come in two forms:
FDA-approved bioidentical medications: Commercially manufactured products available in standardized strengths, including certain patches, gels, sprays, and oral medications.
Compounded bioidentical medications: Prepared by a compounding pharmacy for an individual prescription when an available commercial product can’t meet a patient’s clinical needs.
Understanding Compounded Hormones
Compounding describes how a medication is prepared, not whether the hormone inside it is bioidentical. A licensed compounding pharmacy combines or adjusts ingredients to prepare a medication for an individual patient based on a provider’s prescription.
A compounded medication may be appropriate when a patient needs:
- A strength that isn’t commercially available
- A different dosage form
- An alternative ingredient due to an allergy or intolerance
- A formulation free of a specific dye, filler, or preservative
For example, a provider might prescribe a compounded preparation when a patient is allergic to an inactive ingredient in an otherwise suitable FDA-approved product.
The FDA provides further detail on prescription drug compounding and federal oversight.
The Difference Between Bioidentical and Compounded Hormones
| Category | What It Means | Example |
|---|---|---|
| Bioidentical and Compounded | Same molecular structure as a human hormone, specially prepared by a compounding pharmacy | A customized estradiol preparation made for one patient |
| Bioidentical but Not Compounded | Same molecular structure as a human hormone, commercially manufactured | An FDA-approved estradiol patch or micronized progesterone capsule |
| Compounded but Not Bioidentical | Specially prepared by a pharmacy, but doesn’t use a bioidentical hormone | A customized preparation containing a nonbioidentical hormone |
| Neither | Commercially manufactured, doesn’t contain a bioidentical hormone | Certain conventional hormone medications |
This matters because “bioidentical” is sometimes used incorrectly as a synonym for “custom compounded.” Plenty of FDA-approved bioidentical medications exist and require no compounding at all.
Why Doctors May Prescribe Compounded Bioidentical Hormones
FDA-approved therapies are generally preferred when an appropriate approved product is available. ACOG recommends against routinely prescribing compounded bioidentical menopausal hormone therapy when an FDA-approved formulation can meet the patient’s needs.
Compounding may still be appropriate when:
A commercially available strength isn’t appropriate. A patient may need a dosage or concentration outside what’s commercially manufactured.
A different dosage form is needed. Some patients can’t use a particular commercial formulation and need an alternative.
An ingredient causes an allergy or intolerance. Compounding can sometimes deliver the prescribed hormone without a problematic inactive ingredient.
These decisions rest with the prescribing provider, based on medical history, symptoms, treatment goals, and available FDA-approved options. The Menopause Society offers additional patient advice on evaluating hormone therapy options with a provider.
Quality, Safety, and Pharmacy Standards
FDA-approved drugs go through premarket FDA review for safety, effectiveness, quality, and manufacturing. Individually compounded medications don’t undergo that same review.
That doesn’t mean compounded medications lack standards. Compounding is subject to federal and state requirements, and the United States Pharmacopeia sets minimum standards for nonsterile compounded preparations under General Chapter 795.
Anyone considering compounded hormone therapy should discuss the benefits, limitations, and risks with their prescribing provider and pharmacist.
Frequently Asked Questions
Are all bioidentical hormones compounded?
No. Many bioidentical hormone medications are FDA-approved and commercially manufactured.
Are compounded hormones bioidentical?
Not necessarily. A compounded medication may contain bioidentical hormones, nonbioidentical hormones, or a combination, depending on the prescription.
Are compounded bioidentical hormones safer than FDA-approved hormone therapy?
There isn’t sufficient evidence that compounded bioidentical hormones are safer or more effective than FDA-approved therapies. The FDA and major medical organizations recommend considering an approved option first when one is appropriate.
Are bioidentical hormones natural?
Not necessarily. Some bioidentical hormones start from plant-based source materials, but they go through pharmaceutical processing to reach the desired molecular structure. “Bioidentical” refers to molecular structure, not whether something is natural.
Do I need a prescription for compounded hormone therapy?
Yes, compounded prescription hormones require a valid prescription from a licensed provider.
Do hormone levels need to be tested before or during treatment?
It depends on the hormone, treatment, symptoms, and individual circumstances. Routine testing to individualize compounded menopausal hormone therapy isn’t generally necessary based on current evidence. However when testosterone is prescribed to a woman, serum monitoring is appropriate to keep levels within the physiologic female range. Your provider can determine whether testing fits your situation.
When might a compounded hormone be appropriate?
When an appropriate FDA-approved product can’t meet a patient’s specific clinical needs, such as an unavailable dosage form or an ingredient allergy.
Compounded Hormone Prescriptions at WeCare Pharmacy
Hormone therapy starts with a conversation between you and your provider about your symptoms, medical history, and treatment goals. When a provider determines a customized medication is appropriate, WeCare Pharmacy works with them to prepare the prescribed formulation for your individual prescription.
Have questions about dosage forms, ingredients, or the compounding process? Visit our compounding services page or speak with one of our pharmacists to learn more.
