Drug & supplement interaction

Teazle + Levonorgestrel

Levonorgestrel brand names: Plan B, Mirena, Levonelle One Step, Levonelle 1500, Norgeston, and others.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Oct 4, 2026
The bottom line No known interaction

We found no known interaction between Teazle and Levonorgestrel 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.

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Interaction report

Teazle and Levonorgestrel

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 Levonorgestrel and Teazle 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.

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.

Teazle safety at a glance

Teazle overall Not established Human safety data are very limited, so its safety profile is not well established.
Pregnancy Avoid There is not enough safety information, so it is best to avoid use during pregnancy.
Breastfeeding Avoid Safety while breastfeeding is unknown, so avoid use to be cautious.

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

Still wondering about combining Levonorgestrel and Teazle? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Levonorgestrel

Interactions in our licensed database are recorded against drug classes, not just single drug names. Levonorgestrel is filed under 6 classifications — including contraceptive drugs, cytochrome p450 1a2 (cyp1a2) inhibitors, topical drugs. Teazle has documented interactions with 2 drug classes — the most serious being anticholinergic drugs (moderate) and cholinergic drugs (moderate) — and none of Levonorgestrel’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Teazle Does Interact With Other Medications

Teazle has 219 moderate known drug interactions in our database — Levonorgestrel isn’t one of them. If you take anything else, check it against the full list below.

Moderate 219 No known interaction 2,611 (incl. Levonorgestrel)
Taking anything else?

Check Another of Your Medications Against Teazle

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

What to actually watch for

What Levonorgestrel’s Own FDA Label Lists

This is not an interaction — none of it involves Teazle. These are the most notable effects listed in the ADVERSE REACTIONS section of Levonorgestrel’s own FDA label, for the medication by itself. Knowing the drug’s own list makes it easier to work out the likely cause if something new turns up while you take both. 8 of them are worth acting on rather than waiting out — marked below.

  • Bleeding or bruising Worth acting on mentioned in 12.7% of FDA reports for Levonorgestrel
  • Blood clots Worth acting on
  • Low mood Worth acting on
  • Raised blood pressure Worth acting on
  • A severe allergic reaction Worth acting on
  • Hives Worth acting on
  • A higher chance of infection Worth acting on
  • An allergic reaction Worth acting on
  • Breast tenderness
  • Acne

Showing the 10 most notable of 16 label-listed effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

From the ADVERSE REACTIONS section of the FDA label for Levonorgestrel. Read the label on DailyMed › Where a percentage is shown, it is the share of 206,325 voluntary FDA FAERS reports for Levonorgestrel that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Teazle’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Teazle side to compare — that is a limit of the record, not a statement that Teazle has no side effects.

From our Q&A

Questions About Teazle or Levonorgestrel

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Teazle or Levonorgestrel, 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 Levonorgestrel

This page covers Teazle only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Levonorgestrel page lists 191 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Beer (major), Grapefruit (major), Siberian Cocklebur (major) and St. John's Wort (major).

By severity: 6 major · 142 moderate · 43 minor.

From our pharmacist’s overview on the Levonorgestrel page

“St. John's wort tops my worry list for anyone using levonorgestrel (Plan B, Mirena, and other birth control).”

Reviewed by 2 · Jul 18, 2026

Open the Levonorgestrel interaction page

How much people look this up

Where Teazle and Levonorgestrel 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 Teazle
Steady interest

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

29 days ago today
Medication Levonorgestrel
Top half

#761 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 Teazle reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified October 4, 2026. The Teazle and Levonorgestrel records this page draws on were last updated June 22, 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 Teazle

What is Teazle?

Teazle
  • Lyme disease (folk use)
  • Joint and muscle pain
  • Osteoarthritis and rheumatoid arthritis
  • Skin conditions such as psoriasis
  • Wound healing

Teazle (Dipsacus fullonum) is a spiky plant used in traditional and folk medicine, most notably as a tincture marketed for Lyme disease and for joint pain and skin problems. There is very little high-quality human research to support any of these uses, so its benefits remain unproven. Talk with a pharmacist or doctor before trying it, and never use it to replace standard treatment for serious infections like Lyme disease.

Dipsacus fullonum · Caprifoliaceae · Root, leaves, and aerial parts · Tincture, tea, capsules, dried root, topical preparations

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

Teazle: dosing

There is no established or standardized dose for teazle. Dosing in folk traditions varies widely, and products such as tinctures and capsules differ in strength.If you choose to try a teazle product, follow the directions on the label and do not exceed them.

From our Teazle monograph — the full record covers uses, side effects and every documented interaction.

Read the full Teazle monograph & all interactions
Medication

About Levonorgestrel

What Is Levonorgestrel Used For?

Brand names: Plan B, Mirena, Levonelle One Step, Levonelle 1500, Norgeston, Skyla, Liletta, Kyleena

Levonorgestrel is used in two very different ways, depending on the product.

The intrauterine systems (Mirena, Liletta, Kyleena and Skyla) prevent pregnancy for a set number of years. Mirena and Liletta are also used to treat heavy menstrual bleeding in women who choose intrauterine contraception. The oral tablets are used for emergency contraception, to reduce the chance of pregnancy after unprotected sex.

Most-Reported Side Effects for Levonorgestrel

From FAERS, the FDA’s public side-effect reporting system (206,325 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Device expulsion 45,536 reports
Device dislocation 20,447 reports
Menstruation irregular 15,061 reports
Vaginal haemorrhage 15,056 reports
Genital haemorrhage 11,164 reports
See full Levonorgestrel drug information
Keep checking

Other Drugs & Teazle

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

0Major
219Moderate
0Minor
2,610No known interaction
219 Moderate 2,610 No interaction
Moderate

219 interactions

Showing 60 of 219 moderate interactions — see all 219 on the Teazle page.

No interaction 2,610 drugs checked — show the list

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

Showing the 60 most looked-up of 2,610 medications checked with no known interaction — see the full Teazle list.

See the full Teazle interactions page
See every supplement checked against Levonorgestrel, ranked by severity
Evidence & sources

Teazle References

The 1 references that drive our Teazle 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. Oszmianski J, Wojdylo A, Juszczyk P, Nowicka P. Roots and leaf extracts of Dipsacus fullonum L. and their biological activities. Plants (Basel) 2020;9(1):78. 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 Teazle and Levonorgestrel Together: Common Questions

Is it safe to take Teazle with Levonorgestrel?
We do not list a known interaction between Teazle and Levonorgestrel. 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.
How was the Teazle and Levonorgestrel combination checked?
Interactions in our licensed database are recorded against drug classes. Levonorgestrel is filed under 6 classifications, and Teazle has documented interactions with 2 drug classes — none of Levonorgestrel's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does Teazle interact with any other medications?
Yes. Teazle has 219 documented drug interactions in our database — Levonorgestrel is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does Levonorgestrel interact with any supplements?
Yes. Levonorgestrel has documented interactions with 191 supplements in our database — Teazle is not one of them. The Levonorgestrel 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

Teazle monograph Uses, safety profile, and every drug interaction in one place Levonorgestrel drug information The full plain-English guide to this medication Levonorgestrel supplement interactions Every supplement checked against Levonorgestrel, 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 1 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Levonorgestrel and Teazle?

Our pharmacists answer your medication & supplement questions — free.

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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.