Drug & supplement interaction

Propolis + Acetaminophen, Methocarbamol

Acetaminophen, Methocarbamol brand name: Robaxacet.

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

Acetaminophen, Methocarbamol falls into 2 drug categories that Propolis can interact with; the most serious is rated moderate. Theoretically, high doses of propolis might increase blood levels of drugs metabolized by CYP1A2.

Read the full interaction report
SeverityModerate
LikelihoodPossible
Interactions2
EvidenceD
What do Severity, Likelihood & Evidence mean?
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Interaction report

Propolis and Acetaminophen, Methocarbamol

These two interact in 2 distinct ways. Each one is explained separately below.

Why Are There 2 Interactions?

Propolis interacts with whole categories of medication. Acetaminophen, Methocarbamol falls into 2 of those categories, so it can interact with Propolis in 2 different ways. We’ve listed each one below — your overall risk is driven by the most serious of them (Moderate).

Moderate

CYTOCHROME P450 1A2 (CYP1A2) SUBSTRATES

1 of 2

Why this applies to Acetaminophen, Methocarbamol

Acetaminophen, Methocarbamol falls under CYTOCHROME P450 1A2 (CYP1A2) SUBSTRATES — the group Propolis interacts with.

Theoretically, high doses of propolis might increase blood levels of drugs metabolized by CYP1A2.
In vitro research shows that propolis extract can inhibit CYP1A2. However, animal research shows that propolis extract does not significantly affect CYP1A2 activity when administered to rats at doses up to 250 mg/kg. It is postulated that the constituents of propolis that inhibit CYP1A2 in vitro do not have significant effects in vivo due to low bioavailability and hepatic first-pass effect. This effect has not been reported in humans.
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

Here's the short version: this one is mostly theoretical, so I wouldn't lose sleep over it. The concern is that propolis, in test-tube studies, can slow down a liver enzyme called CYP1A2. Since part of your Robaxacet (the methocarbamol piece, a muscle relaxer) leans on that enzyme, blocking it could in theory let a bit more linger in your blood, which might add to its drowsy, dizzy, lightheaded feel.

But here's the reassuring part: when this was tested in live animals, propolis didn't actually change CYP1A2 much, and it has never been reported as a real problem in people. Everyday amounts of propolis are very unlikely to matter. If you're taking concentrated, high-dose supplements regularly, just run it past your pharmacist to be safe.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Naramoto K, Kato M, Ichihara K. Effects of an ethanol extract of Brazilian green propolis on human cytochrome P450 enzyme activities in vitro. J Agric Food Chem 2014;62(46):11296-302. PubMed
  2. Ryu CS, Oh SJ, Oh JM, et al. Inhibition of cytochrome P450 by propolis in human liver microsomes. Toxicol Res 2016;32(3):207-13. PubMed
Moderate

CYTOCHROME P450 2E1 (CYP2E1) SUBSTRATES

2 of 2

Acetaminophen, Methocarbamol also falls under CYTOCHROME P450 2E1 (CYP2E1) SUBSTRATES.

Theoretically, propolis might increase levels of drugs metabolized by CYP2E1.
In vitro research shows that propolis can inhibit CYP2E1. This effect has not been reported in humans.
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

Robaxacet combines acetaminophen (Tylenol) with the muscle relaxant methocarbamol. One thing worth knowing is that the liver uses an enzyme called CYP2E1 to handle a portion of acetaminophen. In lab dish studies, propolis appears to slow that enzyme down a bit. In theory, slowing it could mean slightly more acetaminophen hanging around in your system.

Here is the honest part: this has only been seen in test tubes, never in actual people, so I wouldn't lose sleep over it. The bigger everyday point is simply not to double up on acetaminophen from other cold or pain products, since too much is hard on the liver. If you take propolis regularly, just mention it to your pharmacist or doctor.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Ryu CS, Oh SJ, Oh JM, et al. Inhibition of cytochrome P450 by propolis in human liver microsomes. Toxicol Res 2016;32(3):207-13. PubMed

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

Propolis Also Interacts With Other Medications

Propolis has 920 moderate known drug interactions in our database — the Acetaminophen, Methocarbamol one above is among them. If you take anything else, check it against the full list below.

Moderate 920 No known interaction 1,910 (incl. Acetaminophen, Methocarbamol)
Taking anything else?

Check Another of Your Medications Against Propolis

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

Everything else you take

See Every Supplement That Interacts With Acetaminophen, Methocarbamol

This page covers Propolis only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Acetaminophen, Methocarbamol page lists 158 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), Procaine (major) and Siberian Cocklebur (major).

By severity: 6 major · 116 moderate · 36 minor.

From our pharmacist’s overview on the Acetaminophen, Methocarbamol page

“Someone reaching for Robaxacet (acetaminophen with methocarbamol) usually has a sore back and wants relief fast, but this is a combination worth pausing over before adding anything from the supplement shelf. Of the 158 ingredients on file, six carry major ratings, and the sharpest danger is to the liver.”

Reviewed by 2 · Jul 18, 2026

Open the Acetaminophen, Methocarbamol interaction page

One more smart check

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

We hold 723 real supplement products containing Propolis, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Propolis. Your product may carry other ingredients that interact with Acetaminophen, Methocarbamol too, on top of Propolis — 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 Propolis and Acetaminophen, Methocarbamol 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 Propolis
Top 25%

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

29 days ago today
Medication Acetaminophen, Methocarbamol
Top half

#952 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 Propolis

What is Propolis?

Propolis
  • Cold sores and herpes lesions (topical)
  • Sore throat and mouth sores
  • Wound and skin healing
  • Immune support
  • Oral and gum health

Propolis is a natural, resin-like substance made by bees that has antimicrobial and anti-inflammatory properties in lab studies. Early research suggests it may help with cold sores, mouth sores, and minor wounds, but high-quality evidence is limited for most uses. It is generally well tolerated, but allergic reactions can occur, especially in people allergic to bee products.

Read the full Propolis monograph & all interactions
Keep checking

Other Drugs & Propolis

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

0Major
920Moderate
0Minor
1,909No known interaction
920 Moderate 1,909 No interaction
Moderate

920 interactions

Showing 60 of 920 moderate interactions — see all 920 on the Propolis page.

No interaction 1,909 drugs checked — show the list

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

Showing the 60 most looked-up of 1,909 medications checked with no known interaction — see the full Propolis list.

See the full Propolis interactions page
See every supplement checked against Acetaminophen, Methocarbamol, 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
Propolis monograph › Uses, safety, and every drug interaction in one place Acetaminophen, Methocarbamol supplement interactions › Every supplement checked against Acetaminophen, Methocarbamol, 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 Ask a pharmacist › Free, personal answer from our licensed team
Pharmacist Counseling Corner

Taking Propolis and Acetaminophen, Methocarbamol Together: Common Questions

Can you take Propolis with Acetaminophen, Methocarbamol?
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.
Why are there 2 interactions listed for Propolis and Acetaminophen, Methocarbamol?
Acetaminophen, Methocarbamol belongs to more than one drug category, and Propolis interacts with each of those categories a little differently. We list every one so nothing is missed — your overall risk is driven by the most serious of them.
How serious is the Propolis and Acetaminophen, Methocarbamol 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 Acetaminophen, Methocarbamol and Propolis?

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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.