Drug & supplement interaction

Androstenedione + Fenoprofen Calcium

Fenoprofen Calcium brand name: Nalfon.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Oct 4, 2026
The bottom line No known interaction

We found no known interaction between Androstenedione and Fenoprofen Calcium in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first. Additionally, although there is no interaction, the label for Fenoprofen Calcium states a food rule worth keeping to, and the two are separately associated with some of the same side effects, which would make a new symptom harder to attribute to one or the other.

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Interaction report

Androstenedione and Fenoprofen Calcium

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Fenoprofen Calcium and Androstenedione in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Androstenedione safety at a glance

Androstenedione overall Avoid It is a controlled substance with hormonal risks and little proven benefit.
Pregnancy Likely Unsafe When used orally. Androstenedione might induce labor. Read the full pregnancy detail
Breastfeeding Avoid It is unsafe and not recommended while breastfeeding.

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Fenoprofen Calcium and Androstenedione? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Fenoprofen Calcium

Interactions in our licensed database are recorded against drug classes, not just single drug names. Fenoprofen Calcium is filed under 5 classifications — including nonsteroidal anti-inflammatory drugs (nsaids), organic anion transporter 3 (oat3) substrates, organic anion transporter 1 (oat1) substrates. Androstenedione has documented interactions with 1 drug class — the most serious being estrogens (moderate) — and none of Fenoprofen Calcium’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Androstenedione Does Interact With Other Medications

Androstenedione has 41 moderate known drug interactions in our database — Fenoprofen Calcium isn’t one of them. If you take anything else, check it against the full list below.

Moderate 41 No known interaction 2,789 (incl. Fenoprofen Calcium)
Taking anything else?

Check Another of Your Medications Against Androstenedione

Covers the 2,830 medications we’ve checked against Androstenedione. Pick one to open its full report.

What to actually watch for

No Interaction Found — But Data Suggests Androstenedione and Fenoprofen Calcium May Share a Side Effect

This is not an interaction. Neither one changes how your body handles the other, and nothing here says they react together. What our sources do show is that each has separately been linked to the effects below — so taking both can make those effects more likely to turn up, and harder to pin on one or the other if they do. One of them is worth acting on rather than waiting out — marked below.

  • Liver problems Worth acting on Additional detail

    Androstenedione

    “Orally, androstenedione may be unsafe.

    Serious Adverse Effects (Rare):

    Orally: hepatotoxicity; breast and endometrial cancer (females); pancreatic and prostate cancer (males); and adverse genitourinary effects.”

    Androstenedione · Natural Medicines adverse-effect record, reported in cancer.

    Fenoprofen Calcium

    Listed in the ADVERSE REACTIONS section of the FDA label for Fenoprofen Calcium. Read the label on DailyMed ›

Reported for Androstenedione but not commonly for Fenoprofen Calcium: low mood, a change in sex drive, breast tenderness and erection problems.

Effects for Fenoprofen Calcium come from the ADVERSE REACTIONS section of its FDA label; effects for Androstenedione come from the Natural Medicines adverse-effect record, quoted above. Where a percentage is shown, it is the share of 49 voluntary FDA FAERS reports for Fenoprofen Calcium that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

Special populations

Androstenedione in Pregnancy & Breastfeeding

Pregnancy Likely Unsafe

When used orally. Androstenedione might induce labor.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center

How to take them

Some Fenoprofen Calcium Products Have a Food Rule — Androstenedione Should Not Break It

At least one FDA label for a product containing Fenoprofen Calcium says to take it with food. If you take Androstenedione on an empty stomach out of habit, keep them separate — and take Fenoprofen Calcium with a meal where the label says to.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two Fenoprofen Calcium products can carry different directions, and extended-release forms often differ from immediate-release ones. The label we read is quoted below — check the directions on your own box or bottle, or ask your pharmacist, for how to take the exact product you were given.

Fenoprofen Calcium may be administered with meals or with milk.

From the Dosage and Administration section of the FDA label we read for Fenoprofen Calcium — where that label names a specific product, the instruction is that product's. Read the label on DailyMed ›

A food rule is not an interaction — it is about how much of the medicine you absorb. The directions that came with your own product, and your pharmacist, outrank anything on this page.

Everything else you take

See Every Supplement That Interacts With Fenoprofen Calcium

This page covers Androstenedione only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Fenoprofen Calcium page lists 32 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Asarabacca (major), Beer (major), Siberian Cocklebur (major) and Wine (major).

By severity: 5 major · 16 moderate · 11 minor.

From our pharmacist’s overview on the Fenoprofen Calcium page

“The kidneys and the stomach lining take the brunt of any NSAID, and fenoprofen calcium (Nalfon), prescribed for arthritis and other pain, is no exception. This list of 32 interacting supplements deserves real caution; five carry a major rating, and understanding those five comes first.”

Reviewed by 2 · Jul 18, 2026

Open the Fenoprofen Calcium interaction page

One more smart check

Taking Androstenedione as Part of a Dietary Supplement Product? Check It for Interactions

We hold 4 real supplement products containing Androstenedione, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Androstenedione. Even though Androstenedione itself has no known interaction with Fenoprofen Calcium, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Androstenedione and Fenoprofen Calcium Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Androstenedione
Top 25%

#350 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Fenoprofen Calcium
Steady interest

#1,898 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Where does our data come from?
  • Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Androstenedione reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified October 4, 2026. The Androstenedione and Fenoprofen Calcium records this page draws on were last updated July 11, 2026.
  • What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
Data structure & sourcing designed and verified by .
Supplement

About Androstenedione

What is Androstenedione?

Androstenedione
  • Muscle building
  • Athletic performance
  • Boosting testosterone
  • Anti-aging
  • Increasing libido

Androstenedione is a prohormone that the body can convert into testosterone and estrogen, but studies have not shown that taking it reliably builds muscle or improves athletic performance. It carries real risks, is a controlled substance in the United States, and is banned in nearly all sports, so most people should avoid it.

Not a plant; a hormone precursor made synthetically or in the body · Capsules, tablets, sublingual sprays, powders (where legally available)

An interaction check asks whether these two react with each other — it does not ask whether Androstenedione is a good idea for someone in your situation. Here is what our Androstenedione record says about it on its own.

Androstenedione: dosing

There is no established safe or effective dose for androstenedione. Past products varied widely, and because it is now a controlled substance, it is not appropriate to recommend any amount.If you encounter a product containing it, do not assume the label dose is safe or accurate. The safest choice is to avoid it.

From our Androstenedione monograph — the full record covers uses, side effects and every documented interaction.

Read the full Androstenedione monograph & all interactions
Medication

About Fenoprofen

What Is Fenoprofen Used For?

Brand name: Nalfon

Fenoprofen is used to relieve mild to moderate pain in adults. It is also used to reduce the pain, swelling, and stiffness caused by rheumatoid arthritis and osteoarthritis.

These uses are supported by products including Fenoprofen Calcium, Fenopron, and Nalfon capsules. Nalfon is also available as a tablet.

Most-Reported Side Effects for Fenoprofen Calcium

From FAERS, the FDA’s public side-effect reporting system (49 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Diarrhea 5 reports
Drug hypersensitivity 5 reports
Headache 5 reports
Myocardial infarction 4 reports
Pain in extremity 4 reports
See full Fenoprofen drug information
Keep checking

Other Drugs & Androstenedione

Browse every other medication we’ve checked against Androstenedione — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
41Moderate
0Minor
2,788No known interaction
41 Moderate 2,788 No interaction
Moderate

41 interactions

No interaction 2,788 drugs checked — show the list

We also checked Androstenedione against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,788 medications checked with no known interaction — see the full Androstenedione list.

See the full Androstenedione interactions page
See every supplement checked against Fenoprofen Calcium, ranked by severity
Evidence & sources

Androstenedione References

The 21 references that drive our Androstenedione monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  1. van Weerden WM, van Kreuningen A, Elissen NM, et al. Effects of adrenal androgens on the transplantable human prostate tumor PC-82. Endocrinol 1992;131:2909-13.
  2. Mecenas CA, Giussani DA, Owiny JR, et al. Production of premature delivery in pregnant rhesus monkeys by androstenedione infusion. Nat Med 1996;2:443-8. PubMed
  3. Anon. Creatine and androstenedione, two dietary supplements. Med Lett Drugs Ther 1998;40:105-6.
  4. Broeder CE, Quindry J, Brittingham K, et al. The Andro Project: physiological and hormonal influences of androstenedione supplementation in men 35 to 65 years old participating in a high-intensity resistance training program. Arch Intern Med 2000;160:30
  5. Leder BZ, Longcope C, Catlin DH, et al. Oral androstenedione administration and serum testosterone concentrations in young men. JAMA 2000;283:779-82. PubMed
  6. Kachhi PN, Henderson SO. Priapism after androstenedione intake for athletic performance enhancement. Ann Emerg Med 2000;35:391-3. PubMed
  7. King DS, Sharp RL, Vukovich MD, et al. Effect of oral androstenedione on serum testosterone and adaptations to resistance training in young men. A randomized controlled trial. JAMA 1999;281:2020-8. PubMed
  8. Weber B, Lewicka S, Deuschle M, et al. Testosterone, androstenedione and dihydrotestosterone concentrations are elevated in female patients with major depression. Psychoneuroendocrinology 2000;25:765-71. PubMed
  9. Brown GA, Vukovich MD, Martini ER, et al. Endocrine responses to chronic androstenedione intake in 30- to 56-year-old men. J Clin Endocrinol Metab 2000;85:4074-80. DOI
  10. Brown GA, Vukovich MD, Martini ER, et al. Effects of androstenedione-herbal supplementation on serum sex hormone concentrations in 30- to 59-year-old men. Int J Vitam Nutr Res 2001;71:293-301. PubMed
  11. Leder, B. Z., Leblanc, K. M., Longcope, C., Lee, H., Catlin, D. H., and Finkelstein, J. S. Effects of oral androstenedione administration on serum testosterone and estradiol levels in postmenopausal women. J Clin Endocrinol Metab 2002;87(12):5449-5454. PubMed
  12. Brown, G. A., Vukovich, M., and King, D. S. Testosterone prohormone supplements. Med Sci Sports Exerc 2006;38(8):1451-1461. PubMed
  13. Cauley, J. A., Lucas, F. L., Kuller, L. H., Stone, K., Browner, W., and Cummings, S. R. Elevated serum estradiol and testosterone concentrations are associated with a high risk for breast cancer. Study of Osteoporotic Fractures Research Group. Ann Intern PubMed
  14. Kohut, M. L., Thompson, J. R., Campbell, J., Brown, G. A., Vukovich, M. D., Jackson, D. A., and King, D. S. Ingestion of a dietary supplement containing dehydroepiandrosterone (DHEA) and androstenedione has minimal effect on immune function in middle-age
  15. Barrett-Connor, E., Garland, C., McPhillips, J. B., Khaw, K. T., and Wingard, D. L. A prospective, population-based study of androstenedione, estrogens, and prostatic cancer. Cancer Res 1-1-1990;50(1):169-173.

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Taking Androstenedione and Fenoprofen Calcium Together: Common Questions

Is it safe to take Androstenedione with Fenoprofen Calcium?
We do not list a known interaction between Androstenedione and Fenoprofen Calcium. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
Do Androstenedione and Fenoprofen Calcium have any of the same side effects?
Yes — our sources link each of them separately to one of the same effects. That is not an interaction: neither changes how your body handles the other. It does mean that if one of those effects turns up, it can be harder to tell which one is behind it. They are listed on this page with the source behind each.
Should I take Androstenedione and Fenoprofen Calcium at the same time of day?
At least one FDA label for a product containing Fenoprofen Calcium says to take it with food. If you take Androstenedione on an empty stomach out of habit, keep them separate and take Fenoprofen Calcium with a meal where the label says to. Food instructions belong to the product rather than the ingredient — two Fenoprofen Calcium products can differ — so check the directions on your own box. This is about absorption, not an interaction.
How was the Androstenedione and Fenoprofen Calcium combination checked?
Interactions in our licensed database are recorded against drug classes. Fenoprofen Calcium is filed under 5 classifications, and Androstenedione has documented interactions with 1 drug class — none of Fenoprofen Calcium's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does Androstenedione interact with any other medications?
Yes. Androstenedione has 41 documented drug interactions in our database — Fenoprofen Calcium is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does Fenoprofen Calcium interact with any supplements?
Yes. Fenoprofen Calcium has documented interactions with 32 supplements in our database — Androstenedione is not one of them. The Fenoprofen Calcium interaction page linked on this page lists every one, ranked by severity.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Where next

Keep Exploring

Androstenedione monograph Uses, safety profile, and every drug interaction in one place Fenoprofen drug information The full plain-English guide to this medication Fenoprofen Calcium supplement interactions Every supplement checked against Fenoprofen Calcium, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 21 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Fenoprofen Calcium and Androstenedione?

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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.