Sarsaparilla + Erlotinib
Erlotinib brand name: Tarceva.
We found no known interaction between Sarsaparilla and Erlotinib 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 label for Erlotinib states a food rule worth keeping to.
Sarsaparilla and Erlotinib
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 Erlotinib and Sarsaparilla 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.
Sarsaparilla safety at a glance
Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
Why No Interaction Is Listed for Erlotinib
Interactions in our licensed database are recorded against drug classes, not just single drug names. Erlotinib is filed under 2 classifications — including oral drugs. Sarsaparilla has documented interactions with 2 drug classes — the most serious being digoxin (lanoxin) (moderate) and lithium (moderate) — and none of Erlotinib’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.
Sarsaparilla Does Interact With Other Medications
Sarsaparilla has 2 moderate known drug interactions in our database — Erlotinib isn’t one of them. If you take anything else, check it against the full list below.
Check Another of Your Medications Against Sarsaparilla
We haven’t checked that one against Sarsaparilla yet — ask our pharmacists directly.
Covers the 2,830 medications we’ve checked against Sarsaparilla. Pick one to open its full report.
Some Erlotinib Products Have a Food Rule — Sarsaparilla Should Not Break It
At least one FDA label for a product containing Erlotinib says to take it on an empty stomach. Most supplements — Sarsaparilla included — are taken with a meal, so the easy mistake is swallowing both together at breakfast. Where that rule applies, keep Erlotinib on its own and move Sarsaparilla to a meal later in the day.
This may not be true of your version. Food instructions belong to the product, not the ingredient: two Erlotinib products can carry different directions, and extended-release forms often differ from immediate-release ones. The label we read is quoted below — check the directions on your own box or bottle, or ask your pharmacist, for how to take the exact product you were given.
Recommended Dose – NSCLC The recommended daily dose of erlotinib tablets for NSCLC is 150 mg taken on an empty stomach, i.e., at least one hour before or two hours after the ingestion of food.
From the Dosage and Administration section of the FDA label we read for Erlotinib — where that label names a specific product, the instruction is that product's. See the Erlotinib drug page ›
A food rule is not an interaction — it is about how much of the medicine you absorb. The directions that came with your own product, and your pharmacist, outrank anything on this page.
What Erlotinib Is Prescribed For, and What Sarsaparilla Has Been Studied For
These two come up together because they touch the same health topic — not because they do the same job. Erlotinib is a prescription medicine with approved uses on its FDA label. Sarsaparilla is a supplement: what follows is what researchers have looked at it for, and how strong that evidence is.
Erlotinib is prescribed for: Erlotinib tablets are used to treat metastatic non-small cell lung cancer (NSCLC) in patients whose tumors carry specific gene changes — EGFR exon 19 deletions or exon 21 (L858R) mutations — confirmed by an FDA-approved test. It can be used as a first-line treatment, as maintenance therapy, or after at least one prior chemotherapy has stopped working. Erlotinib tablets are also used for the first-line treatment of locally advanced, unresectable, or metastatic pancreatic cancer — but only in combination with another chemotherapy drug called gemcitabine. Erlotinib is not recommended alongside platinum-based chemotherapy regimens.
Sarsaparilla has been studied for:
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Cancer studied, not established Sarsaparilla has been studied for this. Natural Medicines rates the evidence: Insufficient Reliable Evidence To Rate Read what the research shows
Sarsaparilla for cancer
Although there has been interest in using oral sarsaparilla for cancer, there is insufficient reliable information about the clinical effects of sarsaparilla for this purpose.
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 Erlotinib on your own; if you are taking Sarsaparilla for the same health topic, tell your prescriber, especially if the medicine is being adjusted to a target.
See Every Supplement That Interacts With Erlotinib
This page covers Sarsaparilla only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Erlotinib page lists 18 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), Bilberry (moderate), Coffee Charcoal (moderate), European Mandrake (moderate) and Glucomannan (moderate).
By severity: 1 major · 8 moderate · 9 minor.
From our pharmacist’s overview on the Erlotinib page
“Activated charcoal is the entry I would flag first for anyone taking erlotinib (Tarceva), an oral targeted therapy for certain lung cancers. Charcoal can adsorb the drug in the gut and cut how much reaches the bloodstream, and with a cancer pill, less absorbed means less cancer fought.”
Reviewed by 2 · Jul 18, 2026
Taking Sarsaparilla as Part of a Dietary Supplement Product? Check It for Interactions
We hold 171 real supplement products containing Sarsaparilla, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Sarsaparilla. Even though Sarsaparilla itself has no known interaction with Erlotinib, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:
Where Sarsaparilla and Erlotinib 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.
#250 of 1,452 supplements looked up here in the last 7 days
#2,520 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 Sarsaparilla reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 27, 2026. The Sarsaparilla and Erlotinib 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 Sarsaparilla
What is Sarsaparilla?
- Skin conditions like psoriasis
- Joint pain and arthritis
- General tonic or 'blood purifier'
- Boosting athletic performance
- Flavoring in beverages
Sarsaparilla is a traditional root used in teas, tonics, and old-fashioned root beer flavoring. Modern evidence for its health claims is very limited and comes mostly from lab studies, so it should not replace proven treatments. It is generally considered low-risk for short-term use, but pregnant and breastfeeding people should avoid it due to a lack of safety data.
Smilax spp. · Smilacaceae · Dried root and rhizome · Capsules, tablets, dried root, tea, liquid extract, tincture
An interaction check asks whether these two react with each other — it does not ask whether Sarsaparilla is a good idea for someone in your situation. Here is what our Sarsaparilla record says about it on its own.
Sarsaparilla: dosing
There is no well-established standard dose for sarsaparilla. Products vary widely in strength and how they are prepared, so the amount in one capsule or tea may be very different from another.The safest approach is to follow the directions on the product label and not exceed the recommended amount.
From our Sarsaparilla monograph — the full record covers uses, side effects and every documented interaction.
About Erlotinib
What Is Erlotinib Used For?
Brand name: Tarceva
Erlotinib tablets are used to treat metastatic non-small cell lung cancer (NSCLC) in patients whose tumors carry specific gene changes — EGFR exon 19 deletions or exon 21 (L858R) mutations — confirmed by an FDA-approved test. It can be used as a first-line treatment, as maintenance therapy, or after at least one prior chemotherapy has stopped working.
Erlotinib tablets are also used for the first-line treatment of locally advanced, unresectable, or metastatic pancreatic cancer — but only in combination with another chemotherapy drug called gemcitabine. Erlotinib is not recommended alongside platinum-based chemotherapy regimens.
Most-Reported Side Effects for Erlotinib
From FAERS, the FDA’s public side-effect reporting system (12,441 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.
Other Drugs & Sarsaparilla
Browse every other medication we’ve checked against Sarsaparilla — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
2 interactions
No interaction 2,827 drugs checked — show the list
We also checked Sarsaparilla against these medications and found no known interaction in our sources. Open any page to confirm.
- Apixaban ›
- Amlodipine ›
- Levothyroxine ›
- Methylphenidate ›
- Warfarin ›
- Abemaciclib ›
- Ivermectin ›
- Testosterone ›
- Sertraline ›
- Acetaminophen ›
- Losartan Potassium ›
- Aspirin ›
- Rosuvastatin ›
- Metoprolol ›
- Escitalopram ›
- Clopidogrel ›
- Rivaroxaban ›
- Atorvastatin ›
- Methamphetamine ›
- Tirzepatide ›
- Isotretinoin ›
- Warfarin Sodium ›
- Ibuprofen ›
- Docusate ›
- Sumatriptan ›
- Amlodipine Besylate ›
- Valacyclovir ›
- Tadalafil ›
- Hydroxyurea ›
- Prednisone ›
- Semaglutide ›
- Metformin ›
- Lisdexamfetamine ›
- Amitriptyline ›
- Propranolol ›
- Amphetamine ›
- Methotrexate ›
- Amoxicillin ›
- Lisinopril ›
- Levothyroxine, Liothyronine ›
- Bupropion ›
- Fluoxetine ›
- Bendamustine ›
- Doxycycline ›
- Azithromycin ›
- Pregabalin ›
- Lamotrigine ›
- Dextroamphetamine ›
- Acyclovir ›
- Gabapentin ›
- Naproxen ›
- Quetiapine ›
- Clonazepam ›
- Buspirone ›
- Omeprazole ›
- Duloxetine ›
- Letrozole ›
- Acetaminophen, Codeine ›
- Acetaminophen, Aspirin, Caffeine ›
- Citalopram ›
Showing the 60 most looked-up of 2,827 medications checked with no known interaction — see the full Sarsaparilla list.
Sarsaparilla References
The 3 references that drive our Sarsaparilla 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.
- Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Trans. S. Klein. Boston, MA: American Botanical Council, 1998.
- Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Food, Drugs and Cosmetics. 2nd ed. New York, NY: John Wiley & Sons, 1996.
- Vandenplas O, Depelchin S, Toussaint G, et al. Occupational asthma caused by sarsaparilla root dust. J Allergy Clin Immunol 1996;97:1416-8. 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.
Taking Sarsaparilla and Erlotinib Together: Common Questions
Is it safe to take Sarsaparilla with Erlotinib?
Should I take Sarsaparilla and Erlotinib at the same time of day?
Are Sarsaparilla and Erlotinib used for the same thing?
How was the Sarsaparilla and Erlotinib combination checked?
Does Sarsaparilla interact with any other medications?
Does Erlotinib interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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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.