Drug & supplement interaction

1,3-dmba + Fenoprofen Calcium

Fenoprofen Calcium brand name: Nalfon.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 20, 2026
The bottom line No known interaction

We found no known interaction between 1,3-dmba 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.

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Interaction report

1,3-dmba 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 1,3-dmba 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.

1,3-dmba safety at a glance

1,3-dmba overall Avoid It is an unapproved synthetic stimulant linked to potentially serious heart and blood vessel harm.
Pregnancy Avoid Stimulants like this should not be used during pregnancy.
Breastfeeding Likely Unsafe When used orally. 1,3-DMBA is thought to have stimulant and vasoconstrictive effects which might increase the risk of serious adverse effects. Read the full breastfeeding detail

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 1,3-dmba? 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. 1,3-dmba has documented interactions with 2 drug classes — the most serious being stimulant drugs (moderate) and cytochrome p450 2d6 (cyp2d6) substrates (minor) — 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

1,3-dmba Does Interact With Other Medications

1,3-dmba has 172 moderate, 149 minor 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 172 Minor 149 No known interaction 2,509 (incl. Fenoprofen Calcium)
Taking anything else?

Check Another of Your Medications Against 1,3-dmba

Covers the 2,830 medications we’ve checked against 1,3-dmba. Pick one to open its full report.

What to actually watch for

What 1,3-dmba Itself Has Been Linked To

This is not an interaction — nothing below involves Fenoprofen Calcium. It is the side-effect record for 1,3-dmba on its own, from the licensed Natural Medicines monograph. If something new turns up after you add 1,3-dmba, this list is the first place to look. One entry is worth acting on rather than waiting out — marked below.

  • A heart attack Worth acting on Additional detail

    “There is currently a limited amount of information available about the adverse effects of 1,3-DMBA. However, the closely related chemical 1,3-DMAA has been linked to serious adverse effects in humans, including lactic acidosis, myocardial infarction, stroke, and death.”

    1,3-dmba · Natural Medicines adverse-effect record, reported in myocardial infarction (mi).

Everything above comes from the Natural Medicines adverse-effect record for 1,3-dmba — expand a row for the licensed statement it rests on. We read the ADVERSE REACTIONS section of Fenoprofen Calcium’s FDA label too, and the two lists don’t meaningfully overlap — which is why no Fenoprofen Calcium column appears here.

Special populations

1,3-dmba in Pregnancy & Breastfeeding

Lactation Likely Unsafe

When used orally. 1,3-DMBA is thought to have stimulant and vasoconstrictive effects which might increase the risk of serious adverse effects.

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 — 1,3-dmba Should Not Break It

At least one FDA label for a product containing Fenoprofen Calcium says to take it with food. If you take 1,3-dmba 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. See the Fenoprofen Calcium drug page ›

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 1,3-dmba 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

How much people look this up

Where 1,3-dmba 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 1,3-dmba
Steady interest

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

29 days ago today
Medication Fenoprofen Calcium
Steady interest

#2,041 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 1,3-dmba reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The 1,3-dmba 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 1,3-dmba

What is 1,3-dmba?

  • Athletic and workout performance
  • Energy and stimulation
  • Weight loss and fat burning
  • Appetite suppression
  • Focus and concentration

1,3-DMBA is a synthetic stimulant chemically similar to the banned stimulant DMAA, and it is not a proven or safe dietary ingredient. The U.S. FDA considers supplements containing it adulterated, and it is banned in sports. Because of serious heart and stroke risks, it is best to avoid products that contain it.

Synthetic chemical (sometimes claimed to come from plants such as Coreopsis tinctoria or pouchong tea) · Capsules, tablets, and powders (pre-workout, fat-burner, and weight-loss products)

An interaction check asks whether these two react with each other — it does not ask whether 1,3-dmba is a good idea for someone in your situation. Here is what our 1,3-dmba record says about it on its own.

1,3-dmba: dosing

There is no safe or established dose of 1,3-DMBA. It is not an approved supplement ingredient, and the amounts in products are unregulated and may vary widely.Because of the real risk of serious harm, no recommended dose can be given. The safest amount is none.

From our 1,3-dmba monograph — the full record covers uses, side effects and every documented interaction.

Read the full 1,3-dmba 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.

See full Fenoprofen drug information
Keep checking

Other Drugs & 1,3-dmba

Browse every other medication we’ve checked against 1,3-dmba — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
172Moderate
149Minor
2,508No known interaction
172 Moderate 149 Minor 2,508 No interaction
Moderate

172 interactions

Showing 60 of 172 moderate interactions — see all 172 on the 1,3-dmba page.

Minor

149 interactions

Showing 60 of 149 minor interactions — see all 149 on the 1,3-dmba page.

No interaction 2,508 drugs checked — show the list

We also checked 1,3-dmba against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,508 medications checked with no known interaction — see the full 1,3-dmba list.

See the full 1,3-dmba interactions page
See every supplement checked against Fenoprofen Calcium, ranked by severity
Evidence & sources

1,3-dmba References

The 4 references that drive our 1,3-dmba 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. SWANSON EE, CHEN KK. Comparison of pressor action of alicyclic derivatives of aliphatic amines. J Pharmacol Exp Ther. 1948 Aug;93(4):423-9.
  2. Cohen PA, Travis JC, and Venhuis BJ. A synthetic stimulant never tested in humans, 1,3-dimethylbutylamine (DMBA), is identified in multiple dietary supplements. Drug Test Analysis.,10-8-2014. PubMed
  3. Liu Y, Santillo MF. Cytochrome P450 2D6 and 3A4 enzyme inhibition by amine stimulants in dietary supplements. Drug Test Anal. 2016;8(3-4):307-10. PubMed
  4. Cohen PA, Travis JC, Keizers PHJ, Deuster P, Venhuis BJ. Four experimental stimulants found in sports and weight loss supplements: 2-amino-6-methylheptane (octodrine), 1,4-dimethylamylamine (1,4-DMAA), 1,3-dimethylamylamine (1,3-DMAA) and 1,3-dimethylbuty

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 1,3-dmba and Fenoprofen Calcium Together: Common Questions

Is it safe to take 1,3-dmba with Fenoprofen Calcium?
We do not list a known interaction between 1,3-dmba 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.
Should I take 1,3-dmba 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 1,3-dmba 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 1,3-dmba and Fenoprofen Calcium combination checked?
Interactions in our licensed database are recorded against drug classes. Fenoprofen Calcium is filed under 5 classifications, and 1,3-dmba has documented interactions with 2 drug classes — 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 1,3-dmba interact with any other medications?
Yes. 1,3-dmba has 321 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 — 1,3-dmba 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

1,3-dmba 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 4 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Fenoprofen Calcium and 1,3-dmba?

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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.