Drug & supplement interaction

Glucosamine + Acetaminophen, Pentazocine

Acetaminophen, Pentazocine brand name: Talacen.

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

Glucosamine has a minor interaction with Acetaminophen, Pentazocine. Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.

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

Glucosamine and Acetaminophen, Pentazocine

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

Minor

ACETAMINOPHEN (Tylenol, others)

Acetaminophen might interfere with the activity of glucosamine sulfate by interacting with the sulfate portion.
Anecdotal reports suggest that adding glucosamine to an acetaminophen regimen might decrease pain control in patients with osteoarthritis. Some research suggests that the sulfate portion of glucosamine sulfate might contribute to its effect in osteoarthritis. Since acetaminophen metabolism requires sulfur and reduces serum sulfate concentrations, acetaminophen could theoretically interfere with the action of glucosamine sulfate. Conversely, the administration of sulfate could theoretically decrease the effectiveness of acetaminophen in sulfate-deficient people by increasing its clearance.
Severity Minor Likelihood Possible Evidence B

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

This is a pretty mild, two-way interaction that mostly involves the acetaminophen portion of your Talacen (which also contains the pain reliever pentazocine). Your liver uses sulfur to process acetaminophen, and that can lower the amount of sulfate floating around in your blood. Since glucosamine sulfate may rely on that sulfate piece to help your joints, taking acetaminophen could, in theory, blunt how well glucosamine works. Going the other way, extra sulfate from the supplement might slightly speed up how fast acetaminophen leaves your system, which could make your pain relief a touch weaker.

Honestly, this is mostly theoretical and based on anecdotal reports, so I would not lose sleep over it. If your joint pain control seems off, just mention it to your pharmacist or doctor before changing anything.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Hoffer LJ, Kaplan LN, Hamadeh MJ, et al. Sulfate could mediate the therapeutic effect of glucosamine sulfate. Metabolism 2001;50:767-70.. PubMed
  2. Bush TM, Rayburn KS, Holloway SW, et al. Adverse interactions between herbal and dietary substances and prescription medications: a clinical survey. Altern Ther Health Med 2007;13:30-5.

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

Glucosamine Also Interacts With Other Medications

Glucosamine has 2 major, 13 moderate, 154 minor known drug interactions in our database — the Acetaminophen, Pentazocine one above is one of them. If you take anything else, check it against the full list below.

Major 2 Moderate 13 Minor 154 No known interaction 2,661 (incl. Acetaminophen, Pentazocine)
Taking anything else?

Check Another of Your Medications Against Glucosamine

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

From our Q&A

Questions About Glucosamine or Acetaminophen, Pentazocine

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Glucosamine or Acetaminophen, Pentazocine, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Acetaminophen, Pentazocine

This page covers Glucosamine only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Acetaminophen, Pentazocine page lists 216 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), Asarabacca (major), Beer (major) and Gamma-hydroxybutyrate (ghb) (major).

By severity: 9 major · 169 moderate · 38 minor.

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

“Talacen combines acetaminophen with pentazocine, an opioid pain reliever, and the opioid is exactly why I treat this page as a serious one. Nine of its 216 supplement interactions are rated major.”

Reviewed by 2 · Jul 18, 2026

Open the Acetaminophen, Pentazocine interaction page

One more smart check

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

We hold 1,984 real supplement products containing Glucosamine, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Glucosamine. Your product may carry other ingredients that interact with Acetaminophen, Pentazocine too, on top of Glucosamine — 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 Glucosamine and Acetaminophen, Pentazocine 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 Glucosamine
Top 10%

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

29 days ago today
Medication Acetaminophen, Pentazocine
Top half

#1,197 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 Glucosamine

What is Glucosamine?

Glucosamine
  • Osteoarthritis
  • Joint pain and stiffness
  • Cartilage support
  • Knee and hip joint health

Glucosamine is a natural compound found in cartilage and joint fluid, and it is one of the most popular supplements for osteoarthritis, especially of the knee. The evidence is mixed, with some people getting modest relief while others get little to no benefit. It is generally well tolerated, but talk to your pharmacist or doctor before starting it, especially if you have a shellfish allergy or diabetes.

Read the full Glucosamine monograph & all interactions
Keep checking

Other Drugs & Glucosamine

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

2Major
13Moderate
154Minor
2,660No known interaction
2 Major 13 Moderate 154 Minor 2,660 No interaction
Major

2 interactions

Moderate

13 interactions

Minor

154 interactions

Showing 60 of 154 minor interactions — see all 154 on the Glucosamine page.

No interaction 2,660 drugs checked — show the list

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

Showing the 60 most looked-up of 2,660 medications checked with no known interaction — see the full Glucosamine list.

See the full Glucosamine interactions page
See every supplement checked against Acetaminophen, Pentazocine, 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
Glucosamine monograph › Uses, safety, and every drug interaction in one place Acetaminophen, Pentazocine supplement interactions › Every supplement checked against Acetaminophen, Pentazocine, 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 Glucosamine and Acetaminophen, Pentazocine Together: Common Questions

Can you take Glucosamine with Acetaminophen, Pentazocine?
There is only a minor interaction, which is usually not serious. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Glucosamine and Acetaminophen, Pentazocine interaction?
We rate it Minor. This interaction is generally not clinically significant, but it remains worth noting and discussing with your pharmacist.

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

Still Have a Question About Acetaminophen, Pentazocine and Glucosamine?

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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.