Gelsemium + Levothyroxine, Liothyronine
Levothyroxine, Liothyronine brand name: Armour Thyroid.
We found no known interaction between Gelsemium and Levothyroxine, Liothyronine 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.
Gelsemium and Levothyroxine, Liothyronine
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 Levothyroxine, Liothyronine and Gelsemium 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 Gelsemium at all — not against Levothyroxine, Liothyronine, 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.
Gelsemium safety at a glance
Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
Gelsemium in Pregnancy & Breastfeeding
When used orally due to toxicity.
DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center
See Every Supplement That Interacts With Levothyroxine, Liothyronine
This page covers Gelsemium only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Levothyroxine, Liothyronine page lists 50 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), Tiratricol (major), Acetyl-l-carnitine (moderate), Alpha-lipoic Acid (moderate) and Ascophyllum Nodosum (moderate).
By severity: 2 major · 39 moderate · 9 minor.
From our pharmacist’s overview on the Levothyroxine, Liothyronine page
“For anyone taking levothyroxine or liothyronine (Armour Thyroid), this list earns real caution, not just a passing glance. Most of these 50 ingredients pull in one of two directions.”
Reviewed by 2 · Jul 18, 2026
Taking Gelsemium as Part of a Dietary Supplement Product? Check It for Interactions
We hold 2 real supplement products containing Gelsemium, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Gelsemium. Even though Gelsemium itself has no known interaction with Levothyroxine, Liothyronine, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:
Where Gelsemium and Levothyroxine, Liothyronine 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.
#1,000 of 1,452 supplements looked up here in the last 7 days
#47 of 2,830 medications looked up here in the last 7 days
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 Gelsemium reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Gelsemium and Levothyroxine, Liothyronine records this page draws on were last updated July 10, 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.
About Gelsemium
What is Gelsemium?
- Anxiety and nervousness
- Headache and migraine
- Flu-like symptoms
- Nerve pain (neuralgia)
- Stage fright
Gelsemium is a highly toxic flowering plant most often sold today in very dilute homeopathic forms for anxiety, headaches, and flu-like symptoms. There is little reliable scientific evidence that it works, and the raw plant is dangerously poisonous, so it should never be used in crude or concentrated form. Always talk to a pharmacist or doctor before trying it.
Gelsemium sempervirens · Gelsemiaceae · Root and rhizome (also used in homeopathic preparations) · Homeopathic pellets and liquid dilutions, tinctures
An interaction check asks whether these two react with each other — it does not ask whether Gelsemium is a good idea for someone in your situation. Here is what our Gelsemium record says about it on its own.
Gelsemium: dosing
There is no established safe dose for the Gelsemium plant, and the crude herb should not be taken because of its toxicity. Homeopathic products use standardized dilution scales rather than measured milligram amounts of plant.If you choose to use a homeopathic Gelsemium product, follow the directions on the label exactly and do not exceed them.
From our Gelsemium monograph — the full record covers uses, side effects and every documented interaction.
About Levothyroxine, Liothyronine
Most-Reported Side Effects for Levothyroxine, Liothyronine
From FAERS, the FDA’s public side-effect reporting system (15 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.
Other Drugs & Gelsemium
Browse every other medication we’ve checked against Gelsemium — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
No interaction 2,829 drugs checked — show the list
We also checked Gelsemium against these medications and found no known interaction in our sources. Open any page to confirm.
- Apixaban ›
- Levothyroxine ›
- Amlodipine ›
- Warfarin ›
- Methylphenidate ›
- Sertraline ›
- Losartan Potassium ›
- Testosterone ›
- Ivermectin ›
- Metoprolol ›
- Aspirin ›
- Acetaminophen ›
- Rivaroxaban ›
- Rosuvastatin ›
- Abemaciclib ›
- Escitalopram ›
- Clopidogrel ›
- Atorvastatin ›
- Tadalafil ›
- Docusate ›
- Tirzepatide ›
- Ibuprofen ›
- Hydroxyurea ›
- Methamphetamine ›
- Valacyclovir ›
- Warfarin Sodium ›
- Semaglutide ›
- Sumatriptan ›
- Prednisone ›
- Lisdexamfetamine ›
- Propranolol ›
- Metformin ›
- Amoxicillin ›
- Lisinopril ›
- Amitriptyline ›
- Bupropion ›
- Methotrexate ›
- Bendamustine ›
- Isotretinoin ›
- Amphetamine ›
- Amlodipine Besylate ›
- Acyclovir ›
- Doxycycline ›
- Fluoxetine ›
- Pregabalin ›
- Lamotrigine ›
- Azithromycin ›
- Gabapentin ›
- Acetaminophen, Codeine ›
- Dextroamphetamine ›
- Clonazepam ›
- Quetiapine ›
- Methylene Blue ›
- Omeprazole ›
- Letrozole ›
- Naproxen ›
- Duloxetine ›
- Buspirone ›
- Citalopram ›
- Ciprofloxacin ›
Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Gelsemium list.
Gelsemium References
The 2 references that drive our Gelsemium 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.
- The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
- Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
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.
Taking Gelsemium and Levothyroxine, Liothyronine Together: Common Questions
Is it safe to take Gelsemium with Levothyroxine, Liothyronine?
Does Levothyroxine, Liothyronine interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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Still Have a Question About Levothyroxine, Liothyronine and Gelsemium?
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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.