Drug & supplement interaction

Swallowroot + Levorphanol

Levorphanol brand name: Levo-Dromoran.

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

We found no known interaction between Swallowroot and Levorphanol 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.

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Interaction report

Swallowroot and Levorphanol

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 Levorphanol and Swallowroot 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.

Swallowroot safety at a glance

Swallowroot overall Not established Human safety data are limited, so use cautiously and under professional guidance.
Pregnancy Avoid Not enough safety information exists, so it is best avoided during pregnancy.
Breastfeeding Avoid Safety while breastfeeding is unknown, so avoid use.

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

Still wondering about combining Levorphanol and Swallowroot? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Levorphanol

Interactions in our licensed database are recorded against drug classes, not just single drug names. Levorphanol is filed under 4 classifications — including narcotic drugs, cns depressants, seizure threshold lowering drugs. Swallowroot has documented interactions with 1 drug class — the most serious being anticoagulant/antiplatelet drugs (moderate) — and none of Levorphanol’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

Swallowroot Does Interact With Other Medications

Swallowroot has 122 moderate known drug interactions in our database — Levorphanol isn’t one of them. If you take anything else, check it against the full list below.

Moderate 122 No known interaction 2,708 (incl. Levorphanol)
Taking anything else?

Check Another of Your Medications Against Swallowroot

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

What to actually watch for

What Levorphanol’s Own FDA Label Lists

This is not an interaction — none of it involves Swallowroot. These are the most notable effects listed in the ADVERSE REACTIONS section of Levorphanol’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.

  • Dependence or withdrawal symptoms Worth acting on
  • Serotonin syndrome Worth acting on
  • Thoughts of self-harm Worth acting on
  • Memory problems Worth acting on
  • Trouble passing urine Worth acting on
  • Low blood sugar Worth acting on
  • A slow heartbeat Worth acting on
  • Confusion Worth acting on
  • Seizures Worth acting on
  • Low mood Worth acting on

Showing the 10 most notable of 30 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 Levorphanol. Read the label on DailyMed › Swallowroot’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Swallowroot side to compare — that is a limit of the record, not a statement that Swallowroot has no side effects.

Everything else you take

See Every Supplement That Interacts With Levorphanol

This page covers Swallowroot only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Levorphanol page lists 100 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: 1,4-butanediol (major), Activated Charcoal (major), Beer (major), Gamma-hydroxybutyrate (ghb) (major) and Kava (major).

By severity: 7 major · 78 moderate · 15 minor.

From our pharmacist’s overview on the Levorphanol page

“Most of the ingredients that interact with levorphanol (Levo-Dromoran) pile onto the same hazard, deeper sedation. Because levorphanol is a potent opioid painkiller, that stacking can slow breathing rather than just cause drowsiness, so this page deserves real vigilance before you add a supplement to it.”

Reviewed by 2 · Jul 18, 2026

Open the Levorphanol interaction page

How much people look this up

Where Swallowroot and Levorphanol 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 Swallowroot
Top half

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

29 days ago today
Medication Levorphanol
Top 10%

#270 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 Swallowroot reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Swallowroot and Levorphanol 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 Swallowroot

What is Swallowroot?

  • Digestive complaints
  • General tonic and appetite stimulant
  • Blood purifier in folk medicine
  • Antimicrobial and food preservative
  • Cooling drink in hot weather

Swallowroot (Decalepis hamiltonii) is a root used in South Indian folk medicine and as a food flavoring, often pickled or made into a cooling drink. Modern scientific evidence for its health benefits in people is very limited, resting mostly on laboratory and animal studies, so its effectiveness is not proven. If you are considering it, talk with your pharmacist or doctor first, especially during pregnancy or breastfeeding.

Decalepis hamiltonii · Apocynaceae · Roots and root tubers · Dried root, root powder, pickles, syrups, and traditional decoctions

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

Swallowroot: dosing

There is no established standardized dose for Swallowroot. Traditional use varies widely depending on whether it is taken as a pickle, a drink, or a powder.If you choose to use a commercial product, follow the directions on the label and do not exceed them.

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

Read the full Swallowroot monograph & all interactions
Medication

About Levorphanol

What Is Levorphanol Used For?

Brand name: Levo-Dromoran

Levorphanol Tartrate Tablets are used to manage pain severe enough to require an opioid — specifically when non-opioid or other pain treatments haven't provided enough relief or aren't a good fit for the patient.

It is not meant for everyday or mild pain. Prescribers weigh the serious risks of opioid therapy carefully before choosing this medication, and it should be used for only as long as the pain requires it.

See full Levorphanol drug information
Keep checking

Other Drugs & Swallowroot

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

0Major
122Moderate
0Minor
2,707No known interaction
122 Moderate 2,707 No interaction
Moderate

122 interactions

Showing 60 of 122 moderate interactions — see all 122 on the Swallowroot page.

No interaction 2,707 drugs checked — show the list

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

Showing the 60 most looked-up of 2,707 medications checked with no known interaction — see the full Swallowroot list.

See the full Swallowroot interactions page
See every supplement checked against Levorphanol, ranked by severity
Evidence & sources

Swallowroot References

The 1 references that drive our Swallowroot 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. Suneetha WJ, Krishnakantha TP. Effect of swallowroot extract on functions of platelets in vitro. J Thromb Thrombolysis 2005;19:133-4. 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 Swallowroot and Levorphanol Together: Common Questions

Is it safe to take Swallowroot with Levorphanol?
We do not list a known interaction between Swallowroot and Levorphanol. 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.
How was the Swallowroot and Levorphanol combination checked?
Interactions in our licensed database are recorded against drug classes. Levorphanol is filed under 4 classifications, and Swallowroot has documented interactions with 1 drug class — none of Levorphanol'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 Swallowroot interact with any other medications?
Yes. Swallowroot has 122 documented drug interactions in our database — Levorphanol 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 Levorphanol interact with any supplements?
Yes. Levorphanol has documented interactions with 100 supplements in our database — Swallowroot is not one of them. The Levorphanol 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

Swallowroot monograph Uses, safety profile, and every drug interaction in one place Levorphanol drug information The full plain-English guide to this medication Levorphanol supplement interactions Every supplement checked against Levorphanol, 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 1 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Levorphanol and Swallowroot?

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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.