Drug & supplement interaction

N,n-dmpea + Trandolapril, Verapamil

Trandolapril, Verapamil brand name: Tarka.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between N,n-dmpea and Trandolapril, Verapamil 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 Trandolapril, Verapamil states a food rule worth keeping to.

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Interaction report

N,n-dmpea and Trandolapril, Verapamil

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 Trandolapril, Verapamil and N,n-dmpea 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.

N,n-dmpea safety at a glance

N,n-dmpea overall Use caution Human safety data are very limited, and stimulant-like effects are possible.
Pregnancy Avoid No safety data exist, so it should be avoided during pregnancy.
Breastfeeding Avoid No safety data exist, so it should be avoided while breastfeeding.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Trandolapril, Verapamil and N,n-dmpea? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Trandolapril, Verapamil

Interactions in our licensed database are recorded against drug classes, not just single drug names. Trandolapril, Verapamil is filed under 13 classifications — including calcium channel blockers, ace inhibitors (aceis), cytochrome p450 2c8 (cyp2c8) substrates. N,n-dmpea has documented interactions with 1 drug class — the most serious being cytochrome p450 2d6 (cyp2d6) substrates (moderate) — and none of Trandolapril, Verapamil’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

N,n-dmpea Does Interact With Other Medications

N,n-dmpea has 193 moderate known drug interactions in our database — Trandolapril, Verapamil isn’t one of them. If you take anything else, check it against the full list below.

Moderate 193 No known interaction 2,637 (incl. Trandolapril, Verapamil)
Taking anything else?

Check Another of Your Medications Against N,n-dmpea

Covers the 2,830 medications we’ve checked against N,n-dmpea. Pick one to open its full report.

What to actually watch for

What Trandolapril, Verapamil’s Own FDA Label Lists

This is not an interaction — none of it involves N,n-dmpea. These are the most notable effects listed in the ADVERSE REACTIONS section of Trandolapril, Verapamil’s own FDA label, for the medication by itself. Knowing the drug’s own list makes it easier to work out the likely cause if something new turns up while you take both. 10 of them are worth acting on rather than waiting out — marked below.

  • A stroke or mini-stroke Worth acting on
  • A bowel blockage Worth acting on
  • High potassium Worth acting on
  • Low sodium Worth acting on
  • Unsteadiness Worth acting on
  • A slow heartbeat Worth acting on
  • A heart attack Worth acting on
  • Pancreatitis Worth acting on
  • Fainting Worth acting on
  • Confusion Worth acting on

Showing the 10 most notable of 50 label-listed effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

From the ADVERSE REACTIONS section of the FDA label for Trandolapril, Verapamil. Read the label on DailyMed › N,n-dmpea’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no N,n-dmpea side to compare — that is a limit of the record, not a statement that N,n-dmpea has no side effects.

How to take them

Some Trandolapril, Verapamil Products Have a Food Rule — N,n-dmpea Should Not Break It

At least one FDA label for a product containing Trandolapril, Verapamil says to take it with food. If you take N,n-dmpea on an empty stomach out of habit, keep them separate — and take Trandolapril, Verapamil 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 Trandolapril, Verapamil 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.

Trandolapril and verapamil hydrochloride extended-release tablets should be administered with food.

From the Dosage and Administration section of the FDA label we read for Trandolapril, Verapamil — 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 Trandolapril, Verapamil

This page covers N,n-dmpea only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Trandolapril, Verapamil page lists 304 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), American Hellebore (major), American Mistletoe (major), Asarabacca (major) and Beer (major).

By severity: 11 major · 250 moderate · 43 minor.

From our pharmacist’s overview on the Trandolapril, Verapamil page

“This is one of the supplement lists I would want a patient to read closely, not skim. Tarka combines trandolapril and verapamil to lower blood pressure, and most of these interactions pull on that same lever, either dropping pressure further than intended or working against the medicine altogether.”

Reviewed by 2 · Jul 18, 2026

Open the Trandolapril, Verapamil interaction page

How much people look this up

Where N,n-dmpea and Trandolapril, Verapamil 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 N,n-dmpea
Steady interest

#1,405 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Trandolapril, Verapamil
Top half

#734 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 N,n-dmpea reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The N,n-dmpea and Trandolapril, Verapamil records this page draws on were last updated June 22, 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 N,n-dmpea

What is N,n-dmpea?

  • Mood or energy support
  • Pre-workout or stimulant effect
  • Cognitive or focus support

N,N-DMPEA (N,N-dimethylphenethylamine) is a synthetic relative of phenethylamine sometimes marketed in stimulant or pre-workout supplements. There is very little reliable human research on its effects or safety, and it is not a well-established dietary ingredient, so it should be approached with real caution.

Powder, capsules, research chemical

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

N,n-dmpea: dosing

There is no established or standardized safe dose of N,N-DMPEA. Because it has not been properly studied in humans, no reliable dosing guidance exists.If a product contains it, follow the product label, but understand that label amounts may not be accurate or safe.

From our N,n-dmpea monograph — the full record covers uses, side effects and every documented interaction.

Read the full N,n-dmpea monograph & all interactions
Keep checking

Other Drugs & N,n-dmpea

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

0Major
193Moderate
0Minor
2,636No known interaction
193 Moderate 2,636 No interaction
Moderate

193 interactions

Showing 60 of 193 moderate interactions — see all 193 on the N,n-dmpea page.

No interaction 2,636 drugs checked — show the list

We also checked N,n-dmpea against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,636 medications checked with no known interaction — see the full N,n-dmpea list.

See the full N,n-dmpea interactions page
See every supplement checked against Trandolapril, Verapamil, ranked by severity
Evidence & sources

N,n-dmpea References

The 2 references that drive our N,n-dmpea 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. 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
  2. Schoenwald RD, Vidvauns S, Wurster DE, Barfknecht CF. Tear film stability of protein extracts from dry eye patients administered a sigma agonist. J Ocul Pharmacol Ther 1997;13(2):151-61. PubMed

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 N,n-dmpea and Trandolapril, Verapamil Together: Common Questions

Is it safe to take N,n-dmpea with Trandolapril, Verapamil?
We do not list a known interaction between N,n-dmpea and Trandolapril, Verapamil. 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 N,n-dmpea and Trandolapril, Verapamil at the same time of day?
At least one FDA label for a product containing Trandolapril, Verapamil says to take it with food. If you take N,n-dmpea on an empty stomach out of habit, keep them separate and take Trandolapril, Verapamil with a meal where the label says to. Food instructions belong to the product rather than the ingredient — two Trandolapril, Verapamil products can differ — so check the directions on your own box. This is about absorption, not an interaction.
How was the N,n-dmpea and Trandolapril, Verapamil combination checked?
Interactions in our licensed database are recorded against drug classes. Trandolapril, Verapamil is filed under 13 classifications, and N,n-dmpea has documented interactions with 1 drug class — none of Trandolapril, Verapamil'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 N,n-dmpea interact with any other medications?
Yes. N,n-dmpea has 193 documented drug interactions in our database — Trandolapril, Verapamil 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 Trandolapril, Verapamil interact with any supplements?
Yes. Trandolapril, Verapamil has documented interactions with 304 supplements in our database — N,n-dmpea is not one of them. The Trandolapril, Verapamil 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

N,n-dmpea monograph Uses, safety profile, and every drug interaction in one place Trandolapril, Verapamil supplement interactions Every supplement checked against Trandolapril, Verapamil, 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 2 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Trandolapril, Verapamil and N,n-dmpea?

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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.