Drug & supplement interaction

Breadfruit + Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine

Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine brand name: Anatuss.

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

Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine falls into 2 drug categories that Breadfruit can interact with; the most serious is rated moderate. Breadfruit might increase the levels of drugs metabolized by uridine diphosphoglucuronosyl transferase (UGT).

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

Breadfruit and Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine

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

Why Are There 2 Interactions?

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

Moderate

GLUCURONIDATED DRUGS

1 of 2

Why this applies to Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine

Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine falls under GLUCURONIDATED DRUGS — the group Breadfruit interacts with.

Breadfruit might increase the levels of drugs metabolized by uridine diphosphoglucuronosyl transferase (UGT). So far, this interaction has not been reported in humans. However, in vitro evidence shows that the breadfruit constituent artocarpin inhibits UGT. Theoretically, this could decrease the clearance and increase levels of glucuronidated drugs. Some drugs that are metabolized through glucuronide conjugation include acetaminophen (Tylenol, others) and oxazepam (Serax), haloperidol (Haldol), lamotrigine (Lamictal), morphine (MS Contin, Roxanol), zidovudine (AZT, Retrovir), and others.
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

The piece of this combo cold product I want to focus on is the acetaminophen (the Tylenol part). Your body clears acetaminophen partly through a process called glucuronidation, run by enzymes called UGTs. A natural compound in breadfruit, artocarpin, has been shown in lab dish studies to slow those enzymes down. In theory, that could let acetaminophen build up a bit more than usual, which is the ingredient you'd worry about most since high acetaminophen levels can stress the liver.

That said, this has never actually been seen in people, and it comes only from test-tube work, so I wouldn't lose sleep over it. Eating breadfruit as a normal food is very different from taking concentrated leaf extracts. Just don't exceed the acetaminophen dose on the label, and check with your pharmacist if you're using breadfruit products regularly.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Qu W, Liu X. Identification of cytochrome P450 isoforms involved in the metabolism of artocarpin and assessment of its drug-drug interaction. Biomed Chromatogr. 2018;32(4). PubMed
Minor

CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES

2 of 2

Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine also falls under CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES.

Theoretically, breadfruit might inhibit cytochrome P450 3A4 (CYP3A4) and increase levels of drugs metabolized by these enzymes; until more is known, use with caution. In vitro, the breadfruit constituent artocarpin can inhibit CYP3A4 enzymes. Also, animal research shows that breadfruit leaf extract can weakly inhibit CYP3A4 enzymes. However, it is unclear if this inhibitory activity causes a clinically meaningful effect on the metabolism of CYP3A4 substrates.
Some drugs metabolized by CYP3A4 include amitriptyline (Elavil), amiodarone (Cordarone), citalopram (Celexa), felodipine (Plendil), lansoprazole (Prevacid), ondansetron (Zofran), prednisone (Deltasone), sertraline (Zoloft), and many others.
Severity Minor 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

This combo cold-and-cough product (Anatuss) is a mix of four ingredients, and the one most affected here is dextromethorphan, the cough suppressant. Your body partly clears dextromethorphan using a liver enzyme called CYP3A4. Lab and animal studies hint that compounds in breadfruit leaves might slow that enzyme down a little. If that happened in real life, dextromethorphan could build up slightly, which might mean more drowsiness, dizziness, or a foggy feeling.

Honestly though, this is theoretical. The evidence comes only from test tubes and animals, and eating breadfruit as food almost certainly does nothing here. Concentrated leaf teas or extracts are the bigger question mark. If you use those, just check in with your pharmacist or doctor first.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Nwokocha CR, Owu DU, McLaren M, et al. Possible mechanisms of action of the aqueous extract of Artocarpus altilis (breadfruit) leaves in producing hypotension in normotensive Sprague-Dawley rats. Pharm Biol. 2012;50(9):1096-102.
  2. Qu W, Liu X. Identification of cytochrome P450 isoforms involved in the metabolism of artocarpin and assessment of its drug-drug interaction. Biomed Chromatogr. 2018;32(4). 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

Breadfruit Also Interacts With Other Medications

Breadfruit has 437 moderate, 504 minor known drug interactions in our database — the Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine one above is among them. If you take anything else, check it against the full list below.

Moderate 437 Minor 504 No known interaction 1,889 (incl. Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine)
Taking anything else?

Check Another of Your Medications Against Breadfruit

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

Everything else you take

See Every Supplement That Interacts With Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine

This page covers Breadfruit only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine page lists 261 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), Ephedra (major) and Grapefruit (major).

By severity: 12 major · 206 moderate · 43 minor.

From our pharmacist’s overview on the Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine page

“Anatuss combines acetaminophen, dextromethorphan, guaifenesin, and phenylpropanolamine, and its supplement list is not one to skim, since 12 of the 261 ingredients on file carry a major rating. Two hazards top the pile.”

Reviewed by 2 · Jul 18, 2026

Open the Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine interaction page

How much people look this up

Where Breadfruit and Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine 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 Breadfruit
Steady interest

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

29 days ago today
Medication Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine
Steady interest

#2,202 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 Breadfruit

What is Breadfruit?

  • Source of nutrition and energy
  • High blood pressure
  • Diabetes and blood sugar support
  • Inflammation and joint discomfort
  • Skin conditions

Breadfruit is a starchy tropical fruit eaten as a staple food, and its leaves are used in traditional medicine for conditions like high blood pressure and diabetes. As a food it is nutritious and generally safe, but the medicinal use of leaf teas or extracts has very little human research to back it up. Talk with your pharmacist or doctor before using breadfruit products for a health condition.

Read the full Breadfruit monograph & all interactions
Keep checking

Other Drugs & Breadfruit

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

0Major
437Moderate
504Minor
1,888No known interaction
437 Moderate 504 Minor 1,888 No interaction
Moderate

437 interactions

Showing 60 of 437 moderate interactions — see all 437 on the Breadfruit page.

Minor

504 interactions

Showing 60 of 504 minor interactions — see all 504 on the Breadfruit page.

No interaction 1,888 drugs checked — show the list

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

Showing the 60 most looked-up of 1,888 medications checked with no known interaction — see the full Breadfruit list.

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

Can you take Breadfruit with Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine?
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 Breadfruit and Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine?
Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine belongs to more than one drug category, and Breadfruit 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 Breadfruit and Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine 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

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