When comparing compounded progesterone vs. Prometrium, the biggest differences come down to how the medication is made and how much flexibility your provider has with the prescription. Prometrium is a commercially manufactured, FDA-approved progesterone medication available in standardized formulations. Compounded progesterone is prepared by a compounding pharmacy for an individual patient according to a provider’s prescription.
Val Vista Pharmacy in Gilbert, AZ compounds progesterone in capsules, cream, troches, and suppositories, so your provider can prescribe the strength and form that fits you. Every prescription is prepared fresh to those specifications, so that you receive the optimal dosage for your health goals.
What is Prometrium?
Prometrium is a commercially manufactured prescription medication that contains progesterone. Medical providers often prescribe Prometrium to help regulate menstrual periods, prevent uterine lining overgrowth in postmenopausal patients who have a uterus and are taking estrogen therapy, or to support sleep in general.
What is compounded progesterone?
Compounded progesterone is progesterone prepared by a licensed compounding pharmacy for one specific patient, based on a provider's prescription. Your provider specifies the strength, dosage form and formulation, and the pharmacy prepares the medication to match.
For many patients, a commercially available medication works well. When a formulation isn’t commercially available, compounded progesterone allows for more individualization to meet a patient’s needs.
How do Prometrium and compounded progesterone compare?
Although both involve progesterone, Prometrium and compounded progesterone are different prescription products.
|
Prometrium |
Compounded progesterone |
|
|
How it’s made |
Commercially manufactured as a finished drug product |
Prepared by a compounding pharmacy for an individual patient’s prescription |
|
FDA status |
FDA-approved as a commercial drug product |
Individual compounded preparations are not FDA-approved |
|
Strength |
100mg or 200mg oil-filled capsules; cannot be split |
Prepared in the strength prescribed by the provider |
|
Dosage form |
Oral capsules only |
May be prepared as a cream, capsule, troche or suppository when prescribed |
|
Inactive ingredients |
Fixed commercial formulation |
Certain ingredients may be adjusted when clinically appropriate |
|
Prescription required |
Yes |
Yes |
At Val Vista Pharmacy in Gilbert, our pharmacists compound progesterone using bioidentical progesterone, meaning it's molecularly identical to the progesterone your body produces naturally. We prepare it in forms including creams, capsules, troches, and suppositories according to the prescription we receive from the provider.
Is compounded progesterone better than Prometrium?
Prometrium is an FDA-approved medication for commercial use and is available in standardized doses.
Compounded progesterone gives providers another option when a commercially available product doesn’t fit the prescription they want to write, while ensuring consistency of the medication from fill to fill.
Compounded progesterone isn’t necessarily considered safer or more effective. The appropriate option for each patient depends on the prescribing provider, the patient’s health history, and treatment goals.
Why would a provider prescribe compounded progesterone instead of Prometrium?
Prometrium contains peanut oil and should not be prescribed for patients with a peanut allergy. Additionally, a provider may consider compounded progesterone when the commercially available product doesn’t match a patient’s specific prescription needs.
For example, they may prescribe:
-
a strength that isn’t commercially available
-
a different dosage form
-
a formulation that avoids a particular inactive ingredient when clinically appropriate (such as a peanut allergy)
-
a combination of hormones prepared in one prescription
The decision is based on the individual patient’s treatment plan.
Read more about compounded progesterone in our article, Compounded Progesterone: What Patients Should Know.
Can you switch from Prometrium to compounded progesterone?
It is possible to switch from Prometrium to compounded progesterone, but that decision should be made with your provider.
The products may differ in strength, dosage form, and formulation even though both contain progesterone.
If you’re having trouble with your current prescription or wondering whether another formulation is available, talk with your provider or one of our pharmacists. Our pharmacists can review your medication, discuss side effects and formulation options, and work with you and your provider to address any concerns. If a change is appropriate, your provider can write a new prescription.
Once Val Vista Pharmacy receives a compounded prescription, our pharmacists review the prescribed dose, formulation, and potential interactions to assess whether it is appropriate for you. We collaborate with your provider to address any concerns before preparing your medication and help you understand how to use it safely.
You can also learn more about our approach to compounded hormone replacement therapy here.
Questions to ask about your progesterone prescription
If you’re not sure why your provider chose one form of progesterone over another, a few direct questions can make the conversation easier:
-
Why are you recommending this form of progesterone for me?
-
Is there a commercially available option that would meet my needs?
-
What strength and dosage form am I being prescribed?
-
Why did you choose this dosage form?
-
Are there inactive ingredients I should know about?
-
How should I take or use this specific prescription?
Your provider can answer questions about why a particular treatment was selected. Your pharmacist can also answer questions about dosing, side effects, potential interactions, and how to use your medication safely, working with you and your provider to address any concerns.
The bottom line
When comparing compounded progesterone vs. Prometrium, neither option is automatically better. The decision comes down to which approach is appropriate for your personal treatment plan.
Have questions about a compounded progesterone prescription?
If your provider has prescribed compounded progesterone, Val Vista Pharmacy can answer questions about your formulation, how it’s prepared, and what to expect when filling your prescription.
Learn more about Hormone Replacement Therapy at Val Vista Pharmacy, or contact our Gilbert pharmacy to speak with a member of our team at (480) 887-0244. We serve patients throughout the East Valley and across Arizona.
Disclaimer: Compounded medications are prepared pursuant to a valid prescription for an individually identified patient. Compounded drugs are not reviewed by the U.S. Food and Drug Administration for safety or effectiveness.
(2026). Prometrium: Package Insert / Prescribing Information. Acertis Pharmaceuticals. https://www.drugs.com/pro/prometrium.html
(2026). PROMETRIUM® (progesterone, USP). DailyMed. https://dailymed.nlm.nih.gov/dailymed/fda/fdaDrugXsl.cfm?setid=1cf237ff-c4f8-4faa-a7aa-77599c856889&type=display
Prev BLOG
