Drug & supplement interaction

Siberian Cocklebur + Cefadroxil

Cefadroxil brand names: Duricef, Ultracef, Cef-Tab.

Major Interaction
Medically reviewed by · Updated October 2026
The bottom line Major

Siberian Cocklebur has a major interaction with Cefadroxil. Siberian cocklebur can adversely affect the kidney.

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

Siberian Cocklebur and Cefadroxil

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

Major

NEPHROTOXIC DRUGS

Why this applies to Cefadroxil

Cefadroxil falls under NEPHROTOXIC DRUGS — the group Siberian Cocklebur interacts with.

Siberian cocklebur can adversely affect the kidney. Theoretically, combining Siberian cocklebur with potentially nephrotoxic drugs might have additive harmful effects on kidney function.
Some potentially nephrotoxic drugs include cyclosporine (Neoral, Sandimmune); aminoglycosides including amikacin (Amikin), gentamicin (Garamycin, Gentak, others), and tobramycin (Nebcin, others); nonsteroidal anti-inflammatory drugs (NSAIDs) including ibuprofen (Advil, Motrin, Nuprin, others), indomethacin (Indocin), naproxen (Aleve, Anaprox, Naprelan, Naprosyn), piroxicam (Feldene); and numerous others.
Severity Major Likelihood Likely Evidence B

Well-controlled human studies have demonstrated the likely existence of this interaction.

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

Here's the thing to know about pairing Siberian cocklebur with cefadroxil. Cefadroxil is an antibiotic that your kidneys clear from your body, and it can occasionally stress the kidneys on its own. Siberian cocklebur contains naturally toxic compounds that can also harm the kidneys. So this isn't about one changing the other's levels. It's that both can lean on the same organ, and together that strain could add up.

If kidney function dips, you might notice things like swelling in your legs, less urination, or feeling unusually tired. The herbal side here is the bigger worry, since cocklebur can be genuinely poisonous. I'd strongly suggest talking with your pharmacist or doctor before combining these, rather than changing anything on your own.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Turgut M, Alhan CC, Gurgoze M, et al. Carboxyatractyloside poisoning in humans. Ann Trop Paediatr 2005;25(2):125-34. PubMed
  2. Karabiber H, Almis H, Selimoglu MA, Yakinci C, Yilmaz S. Xanthium strumarium poisoning requiring liver transplantation. J Pediatr Gastroenterol Nutr. 2014;58(1):e6-9.

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

Siberian Cocklebur Also Interacts With Other Medications

Siberian Cocklebur has 663 major, known drug interactions in our database — the Cefadroxil one above is one of them. If you take anything else, check it against the full list below.

Major 663 No known interaction 2,167 (incl. Cefadroxil)
Taking anything else?

Check Another of Your Medications Against Siberian Cocklebur

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

Everything else you take

See Every Supplement That Interacts With Cefadroxil

This page covers Siberian Cocklebur only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Cefadroxil page lists 60 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Asarabacca (major), African Wild Potato (moderate), Aristolochia (moderate) and Bacillus Coagulans (moderate).

By severity: 3 major · 46 moderate · 11 minor.

From our pharmacist’s overview on the Cefadroxil page

“Cefadroxil, a cephalosporin antibiotic usually taken as a short course for skin, throat, or urinary infections, has a supplement list that deserves genuine care, not a quick skim. Three of the 60 ingredients on file rate major.”

Reviewed by 2 · Jul 18, 2026

Open the Cefadroxil interaction page

One more smart check

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

We hold 84 real supplement products containing Siberian Cocklebur, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Siberian Cocklebur. Your product may carry other ingredients that interact with Cefadroxil too, on top of Siberian Cocklebur — 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 Siberian Cocklebur and Cefadroxil 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 Siberian Cocklebur
Top half

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

29 days ago today
Medication Cefadroxil
Top half

#1,047 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 Siberian Cocklebur

What is Siberian Cocklebur?

  • Nasal congestion and sinus problems
  • Allergic rhinitis (hay fever)
  • Headache
  • Skin conditions and itching
  • Joint and muscle discomfort

Siberian cocklebur is a fruit used in traditional Chinese and other Asian herbal medicine, mainly for nasal congestion, sinus issues, and allergies. Human evidence is very limited, and the plant contains naturally toxic compounds that can cause serious poisoning, so it should only be used under expert guidance, if at all.

Read the full Siberian Cocklebur monograph & all interactions
Medication

About Cefadroxil

What Is Cefadroxil Used For?

Brand names: Duricef, Ultracef, Cef-Tab

Cefadroxil treats certain bacterial infections when the germ is susceptible to it. It does not work on viruses.

The capsule, tablet and oral suspension labels list the same uses:

  • Urinary tract infections caused by E. coli, P. mirabilis and Klebsiella species
  • Skin and skin structure infections caused by staphylococci and/or streptococci
  • Sore throat (pharyngitis) and/or tonsillitis caused by Group A beta-hemolytic streptococci (Streptococcus pyogenes)
See full Cefadroxil drug information Cefadroxil NDC codes and packages
Keep checking

Other Drugs & Siberian Cocklebur

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

663Major
0Moderate
0Minor
2,166No known interaction
663 Major 2,166 No interaction
Major

663 interactions

Showing 60 of 663 major interactions — see all 663 on the Siberian Cocklebur page.

No interaction 2,166 drugs checked — show the list

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

Showing the 60 most looked-up of 2,166 medications checked with no known interaction — see the full Siberian Cocklebur list.

See the full Siberian Cocklebur interactions page
See every supplement checked against Cefadroxil, 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
Siberian Cocklebur monograph › Uses, safety, and every drug interaction in one place Cefadroxil supplement interactions › Every supplement checked against Cefadroxil, ranked by severity Cefadroxil drug information › The full plain-English guide to this medication Cefadroxil NDC codes and packages › Every package, labeler and price in the FDA directory 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 Siberian Cocklebur and Cefadroxil Together: Common Questions

Can you take Siberian Cocklebur with Cefadroxil?
This is rated a major interaction, so the combination is best avoided unless your doctor or pharmacist has specifically told you otherwise. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Siberian Cocklebur and Cefadroxil interaction?
We rate it Major. This is a clinically significant combination that is generally best avoided, or used only under the direct supervision of your physician or pharmacist.

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

Still Have a Question About Cefadroxil and Siberian Cocklebur?

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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.