Drug & supplement interaction

Yin Chen + Levorphanol

Levorphanol brand name: Levo-Dromoran.

Moderate Interaction
Medically reviewed by · Updated September 2026
The bottom line Moderate

Yin Chen has a moderate interaction with Levorphanol. Theoretically, yin chen might enhance the therapeutic and adverse effects of other CNS depressants.

Read the full interaction report
SeverityModerate
LikelihoodPossible
EvidenceD
What do Severity, Likelihood & Evidence mean?
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Interaction report

Yin Chen and Levorphanol

Here is the interaction we found between these two, with the evidence behind it.

Moderate

CNS DEPRESSANTS

Why this applies to Levorphanol

Levorphanol falls under CNS DEPRESSANTS — the group Yin Chen interacts with.

Theoretically, yin chen might enhance the therapeutic and adverse effects of other CNS depressants.
Animal research shows that yin chen has sedative effects and can reduce motor activity and impair balance and coordination. When used in combination with pentobarbital, yin chen increases sleeping time when compared to pentobarbital alone.
Severity Moderate Likelihood Possible Evidence D

Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.

Dr. Brian Staiger, PharmD, BCPS
Dr. Brian Staiger explains PharmD, Clinical Pharmacist

Levorphanol is a strong opioid pain reliever, and one of its main effects is calming down the brain and nervous system. That's helpful for pain, but it also brings drowsiness, slowed breathing, and dizziness. Yin Chen appears to have its own sedative effect in lab and animal studies, where it lengthened sleep time and reduced coordination when paired with other depressants.

Stacking the two could, in theory, deepen that sleepy, foggy feeling and add to the risk of trouble breathing. I want to be honest though: this concern comes only from animal research, so we don't really know how strong it is in people. Please don't change anything on your own. Just loop in your pharmacist or doctor before combining them so they can keep an eye on you.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. dela Peña IJ, Hong E, Kim HJ, et al. Artemisia capillaris thunberg produces sedative-hypnotic effects in mice, which are probably mediated through potentiation of the GABAA receptor. Am J Chin Med. 2015;43(4):667-79.

What These Ratings Mean

Every interaction above is graded three ways — here’s the key to each label.

Severity how clinically significant the interaction is
Major

Clinically significant. Avoid the combination, or use only under close professional supervision.

Moderate

Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.

Minor

Generally not serious. Be aware of it and mention it to your pharmacist.

Likelihood how strong the evidence is that the interaction actually happens in people
  • LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
  • ProbableInteraction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • PossibleInteraction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
  • UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
Evidence the quality of the studies behind the rating (graded A–D)
  • AHigh-quality meta-analysis (quantitative systematic review).
  • BCase-control study.
  • CConsensus.
  • DAnecdotal evidence.

These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.

Keep it in perspective

Yin Chen Also Interacts With Other Medications

Yin Chen has 247 moderate known drug interactions in our database — the Levorphanol one above is one of them. If you take anything else, check it against the full list below.

Moderate 247 No known interaction 2,583 (incl. Levorphanol)
Taking anything else?

Check Another of Your Medications Against Yin Chen

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

Everything else you take

See Every Supplement That Interacts With Levorphanol

This page covers Yin Chen 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

One more smart check

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

We hold 20 real supplement products containing Yin Chen, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Yin Chen. Your product may carry other ingredients that interact with Levorphanol too, on top of Yin Chen — and those would not show on this page. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Yin Chen 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 Yin Chen
Steady interest

#1,439 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Levorphanol
Top half

#891 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.

Supplement

About Yin Chen

What is Yin Chen?

Yin Chen
  • Liver and gallbladder support
  • Jaundice (traditional use)
  • Digestive complaints
  • Skin conditions (topical)
  • Anti-inflammatory and antimicrobial purposes

Yin Chen is a traditional Chinese medicine herb used mainly for liver and gallbladder complaints and jaundice. Most of the evidence comes from laboratory and animal studies, so its benefits in people are not well proven. Talk with a pharmacist or doctor before using it, especially if you have a liver condition, are pregnant, or are breastfeeding.

Read the full Yin Chen 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 & Yin Chen

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

0Major
247Moderate
0Minor
2,582No known interaction
247 Moderate 2,582 No interaction
Moderate

247 interactions

Showing 60 of 247 moderate interactions — see all 247 on the Yin Chen page.

No interaction 2,582 drugs checked — show the list

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

Showing the 60 most looked-up of 2,582 medications checked with no known interaction — see the full Yin Chen list.

See the full Yin Chen interactions page
See every supplement checked against Levorphanol, ranked by severity
Sources

Sources & How We Checked

Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

Keep exploring
Yin Chen monograph › Uses, safety, and every drug interaction in one place Levorphanol supplement interactions › Every supplement checked against Levorphanol, ranked by severity Levorphanol drug information › The full plain-English guide to this medication Supplement interaction checker › Check any supplement or product against your medications Browse medications A–Z › Every drug we've checked against herbs & supplements Ask a pharmacist › Free, personal answer from our licensed team
Pharmacist Counseling Corner

Taking Yin Chen and Levorphanol Together: Common Questions

Can you take Yin Chen with Levorphanol?
There is a moderate interaction, so it may be acceptable with monitoring or timing changes — but check with your pharmacist first. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Yin Chen and Levorphanol interaction?
We rate it Moderate. This combination may require monitoring, a dose adjustment, or separating the times you take each one. Consult your pharmacist before using them together.

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

Still Have a Question About Levorphanol and Yin Chen?

Our pharmacists answer your medication & supplement questions — free.

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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.