Drug & supplement interaction

Avocado Soy Unsaponifiables (asu) + Acetaminophen

Acetaminophen brand names: Tylenol Ex Strength, Children's Tylenol, Tylenol, Children's Tylenol Meltaways.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 27, 2026
The bottom line No known interaction

We found no known interaction between Avocado Soy Unsaponifiables (asu) and Acetaminophen 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 two are separately associated with some of the same side effects, which would make a new symptom harder to attribute to one or the other.

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Interaction report

Avocado Soy Unsaponifiables (asu) and Acetaminophen

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 Acetaminophen and Avocado Soy Unsaponifiables (asu) 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.

Worth understanding: our licensed dataset holds no drug-interaction record for Avocado Soy Unsaponifiables (asu) at all — not against Acetaminophen, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.

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.

Avocado Soy Unsaponifiables (asu) safety at a glance

Avocado Soy Unsapo... overall Use caution Generally well tolerated for short to medium-term use, but long-term safety is not fully established.
Pregnancy Avoid Not enough safety data, so it is best avoided during pregnancy.
Breastfeeding Avoid Safety during breastfeeding has not been studied, so avoidance is recommended.

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

Still wondering about combining Acetaminophen and Avocado Soy Unsaponifiables (asu)? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

No Interaction Found — But Data Suggests Avocado Soy Unsaponifiables (asu) and Acetaminophen May Share Several of the Same Side Effects

This is not an interaction. Neither one changes how your body handles the other, and nothing here says they react together. What our sources do show is that each has separately been linked to the effects below — so taking both can make those effects more likely to turn up, and harder to pin on one or the other if they do.

  • Constipation / Nausea / Diarrhea reported in 6.2% of FDA reports for Acetaminophen Additional detail

    Avocado Soy Unsaponifiables (asu)

    “Orally, avocado soy unsaponifiables have been rarely reported to cause constipation, diarrhea, dyspepsia, heartburn, nausea, regurgitation, and stomach pain. In addition, a single case of lymphocytic colitis thought to be associated with the use of a specific type of avocado soy unsaponifiables (Piascledine 300, Laboratoires Expanscience) has been reported.”

    Avocado Soy Unsaponifiables (asu) · Natural Medicines adverse-effect record, reported in constipation.

    3 sources cited
    1. 10693. Maheu E, Mazieres B, Valat JP, et al. Symptomatic efficacy of avocado/soybean unsaponifiables in the treatment of osteoarthritis of the knee and hip: a prospective, randomized, double-blind, placebo-controlled, multicenter clinical trial with a six-month
    2. 10694. Lequesne M, Maheu E, Cadet C, Dreiser RL. Structural effect of avocado/soybean unsaponifiables on joint space loss in osteoarthritis of the hip. Arthritis Rheum 2002;47:50-8.. PubMed
    3. 100551. Christiansen BA, Bhatti S, Goudarzi R, Emami S. Management of osteoarthritis with avocado/soybean unsaponifiables. Cartilage. 2015;6(1):30-44. PubMed

    Acetaminophen

    Listed in the ADVERSE REACTIONS section of the FDA label for Acetaminophen, and in voluntary FDA adverse-event reports. Read the label on DailyMed ›

  • Headache reported in 5.7% of FDA reports for Acetaminophen Additional detail

    Avocado Soy Unsaponifiables (asu)

    “Orally, avocado soy unsaponifiables have been rarely reported to cause drowsiness, headache, and migraine.”

    Avocado Soy Unsaponifiables (asu) · Natural Medicines adverse-effect record, reported in cluster headache.

    1 source cited
    1. 10693. Maheu E, Mazieres B, Valat JP, et al. Symptomatic efficacy of avocado/soybean unsaponifiables in the treatment of osteoarthritis of the knee and hip: a prospective, randomized, double-blind, placebo-controlled, multicenter clinical trial with a six-month

    Acetaminophen

    Listed in the ADVERSE REACTIONS section of the FDA label for Acetaminophen, and in voluntary FDA adverse-event reports. Read the label on DailyMed ›

Reported for Avocado Soy Unsaponifiables (asu) but not commonly for Acetaminophen: stomach pain, drowsiness, a skin rash and stomach upset.

Effects for Acetaminophen come from the ADVERSE REACTIONS section of its FDA label; effects for Avocado Soy Unsaponifiables (asu) come from the Natural Medicines adverse-effect record, quoted above. Where a percentage is shown, it is the share of 679,604 voluntary FDA FAERS reports for Acetaminophen that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

Overlapping uses

What Acetaminophen Is Prescribed For, and What Avocado Soy Unsaponifiables (asu) Has Been Studied For

These two come up together because they touch the same health topic — not because they do the same job. Acetaminophen is a prescription medicine with approved uses on its FDA label. Avocado Soy Unsaponifiables (asu) is a supplement: what follows is what researchers have looked at it for, and how strong that evidence is.

Acetaminophen is prescribed for: Acetaminophen temporarily relieves minor aches and pains caused by headaches, the common cold, backaches, muscle aches, toothaches, minor arthritis pain, and premenstrual or menstrual cramps. It also temporarily reduces fever. These uses apply across oral tablet, suspension, and oral liquid products. The intravenous (IV) injection form is used in clinical settings to treat acute pain and fever, including in pediatric patients 2 years and older.

Avocado Soy Unsaponifiables (asu) has been studied for:

  • Osteoarthritis Natural Medicines rates the evidence for Avocado Soy Unsaponifiables (asu): Possibly Effective Read what the research shows

    Avocado Soy Unsaponifiables (asu) for osteoarthritis

    Short-term use of oral avocado soy unsaponifiables in patients with knee and hip osteoarthritis seems to reduce pain, disability, and analgesic use. Longer-term use in patients with hip osteoarthritis might reduce disease progression and joint space narrowing in those with more severe disease, but effects on pain and joint space narrowing in those with less severe disease are unclear.

Effectiveness ratings and the research summaries above are the verbatim record from the Natural Medicines database, which grades evidence from “Effective” down to “Insufficient Reliable Evidence To Rate”. A rating below the top of that scale means researchers have looked at it — not that it works, and never that it can stand in for a prescribed medicine. Do not stop or replace Acetaminophen on your own; if you are taking Avocado Soy Unsaponifiables (asu) for the same health topic, tell your prescriber, especially if the medicine is being adjusted to a target.

From our Q&A

Questions About Avocado Soy Unsaponifiables (asu) or Acetaminophen

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Avocado Soy Unsaponifiables (asu) or Acetaminophen, 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

This page covers Avocado Soy Unsaponifiables (asu) only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Acetaminophen page lists 155 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), Siberian Cocklebur (major) and Wine (major).

By severity: 5 major · 114 moderate · 36 minor.

From our pharmacist’s overview on the Acetaminophen page

“Acetaminophen (Tylenol) feels harmless because it sits on every shelf, but this list deserves real attention, mostly because of your liver. Of the 155 supplements and herbs on file, five carry a major rating, and the largest serious group, 38 ingredients, adds liver strain on top of acetaminophen's own well-known potential to harm the…”

Reviewed by 2 · Jul 18, 2026

Open the Acetaminophen interaction page

How much people look this up

Where Avocado Soy Unsaponifiables (asu) and Acetaminophen 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 Avocado Soy Unsaponifiables (asu)
Steady interest

#1,421 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Acetaminophen
Top 10

#5 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 Avocado Soy Unsaponifiables (asu) reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 27, 2026. The Avocado Soy Unsaponifiables (asu) and Acetaminophen records this page draws on were last updated July 11, 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 Avocado Soy Unsaponifiables (asu)

What is Avocado Soy Unsaponifiables (asu)?

Avocado Soy Unsaponifiables (asu)
  • Osteoarthritis of the knee and hip
  • Joint pain and stiffness
  • Reducing reliance on NSAIDs
  • Cartilage support
  • Temporomandibular joint (TMJ) discomfort

Avocado Soy Unsaponifiables (ASU) is a plant-oil extract studied mainly for osteoarthritis of the knee and hip, where some research suggests it may modestly ease pain and improve joint function. It is generally well tolerated, but the evidence is mixed and effects build slowly over months. Talk with your pharmacist or doctor before starting, especially if you take other medicines or have allergies.

Oils from avocado fruit (Persea americana) and soybean (Glycine max) · Capsules, softgels (often combined with glucosamine and chondroitin in joint supplements)

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

Avocado Soy Unsaponifiables (asu): dosing

There is no official standardized dose for ASU, and products can differ in strength and content. Because ASU works slowly, it may take two to three months before you can judge whether it is helping.

From our Avocado Soy Unsaponifiables (asu) monograph — the full record covers uses, side effects and every documented interaction.

Read the full Avocado Soy Unsaponifiables (asu) monograph & all interactions
Medication

About Acetaminophen

What Is Acetaminophen Used For?

Brand names: Tylenol Ex Strength, Children's Tylenol, Tylenol, Children's Tylenol Meltaways

Acetaminophen temporarily relieves minor aches and pains caused by headaches, the common cold, backaches, muscle aches, toothaches, minor arthritis pain, and premenstrual or menstrual cramps. It also temporarily reduces fever.

These uses apply across oral tablet, suspension, and oral liquid products. The intravenous (IV) injection form is used in clinical settings to treat acute pain and fever, including in pediatric patients 2 years and older.

Most-Reported Side Effects for Acetaminophen

From FAERS, the FDA’s public side-effect reporting system (679,604 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Fatigue 45,791 reports
Nausea 41,932 reports
Overdose 40,941 reports
Drug dependence 39,209 reports
Headache 38,738 reports
See full Acetaminophen drug information
Keep checking

Other Drugs & Avocado Soy Unsaponifiables (asu)

Browse every other medication we’ve checked against Avocado Soy Unsaponifiables (asu) — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

We also checked Avocado Soy Unsaponifiables (asu) against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Avocado Soy Unsaponifiables (asu) list.

See the full Avocado Soy Unsaponifiables (asu) interactions page
See every supplement checked against Acetaminophen, ranked by severity
Evidence & sources

Avocado Soy Unsaponifiables (asu) References

The 3 references that drive our Avocado Soy Unsaponifiables (asu) 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. Maheu E, Mazieres B, Valat JP, et al. Symptomatic efficacy of avocado/soybean unsaponifiables in the treatment of osteoarthritis of the knee and hip: a prospective, randomized, double-blind, placebo-controlled, multicenter clinical trial with a six-month
  2. Lequesne M, Maheu E, Cadet C, Dreiser RL. Structural effect of avocado/soybean unsaponifiables on joint space loss in osteoarthritis of the hip. Arthritis Rheum 2002;47:50-8.. PubMed
  3. Christiansen BA, Bhatti S, Goudarzi R, Emami S. Management of osteoarthritis with avocado/soybean unsaponifiables. Cartilage. 2015;6(1):30-44. 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 Avocado Soy Unsaponifiables (asu) and Acetaminophen Together: Common Questions

Is it safe to take Avocado Soy Unsaponifiables (asu) with Acetaminophen?
We do not list a known interaction between Avocado Soy Unsaponifiables (asu) and Acetaminophen. 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.
Do Avocado Soy Unsaponifiables (asu) and Acetaminophen have any of the same side effects?
Yes — our sources link each of them separately to 4 of the same effects. That is not an interaction: neither changes how your body handles the other. It does mean that if one of those effects turns up, it can be harder to tell which one is behind it. They are listed on this page with the source behind each.
Are Avocado Soy Unsaponifiables (asu) and Acetaminophen used for the same thing?
They overlap in purpose, which usually means the real question is whether you need both rather than whether they are safe together. This page lists the shared uses and how strong the evidence is for Avocado Soy Unsaponifiables (asu) in each. That is a conversation for your prescriber, especially if Acetaminophen is being adjusted to a target.
Does Acetaminophen interact with any supplements?
Yes. Acetaminophen has documented interactions with 155 supplements in our database — Avocado Soy Unsaponifiables (asu) is not one of them. The Acetaminophen 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

Avocado Soy Unsaponifiables (asu) monograph Uses, safety profile, and every drug interaction in one place Acetaminophen drug information The full plain-English guide to this medication Acetaminophen supplement interactions Every supplement checked against Acetaminophen, 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 3 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Acetaminophen and Avocado Soy Unsaponifiables (asu)?

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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.