Sarsaparilla + Ketoconazole
Ketoconazole brand name: Nizoral.
We found no known interaction between Sarsaparilla and Ketoconazole 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.
Sarsaparilla and Ketoconazole
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 Ketoconazole 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 Ketoconazole
Interactions in our licensed database are recorded against drug classes, not just single drug names. Ketoconazole is filed under 8 classifications — including antifungals, cytochrome p450 2c19 (cyp2c19) inhibitors, cytochrome p450 2c9 (cyp2c9) inhibitors. Sarsaparilla has documented interactions with 2 drug classes — the most serious being digoxin (lanoxin) (moderate) and lithium (moderate) — and none of Ketoconazole’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 — Ketoconazole 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.
Questions About Sarsaparilla or Ketoconazole
These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Sarsaparilla or Ketoconazole, 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.
See Every Supplement That Interacts With Ketoconazole
This page covers Sarsaparilla only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Ketoconazole page lists 182 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 · 135 moderate · 41 minor.
From our pharmacist’s overview on the Ketoconazole page
“Ketoconazole (Nizoral) is already hard on the liver, so treat its 182 interacting supplements with genuine care, starting with the six rated major. Most of the list runs through CYP3A4, the liver enzyme ketoconazole strongly blocks, so it can raise levels of over a hundred herbal ingredients, while grapefruit pushes ketoconazole itself…”
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 Ketoconazole, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:
Where Sarsaparilla and Ketoconazole 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.
#247 of 1,452 supplements looked up here in the last 7 days
#1,996 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 20, 2026. The Sarsaparilla and Ketoconazole 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 Ketoconazole
What Is Ketoconazole Used For?
Brand name: Nizoral
Ketoconazole 2% shampoo and foam are used to treat tinea versicolor (also called pityriasis versicolor) — a fungal infection caused by Pityrosporum orbiculare (also known as Malassezia furfur), a yeast that naturally lives on the skin.
This infection creates light or dark patches, most often on the trunk, neck, arms, and upper thighs. Even after the fungus is cleared, those skin patches may take months to return to their normal color — that's normal, and depends on your skin type and sun exposure. Tinea versicolor can also come back, since the fungus lives on healthy skin even when there's no active infection.
Most-Reported Side Effects for Ketoconazole
From FAERS, the FDA’s public side-effect reporting system (0 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 ›
- Levothyroxine ›
- Amlodipine ›
- Methylphenidate ›
- Warfarin ›
- Sertraline ›
- Testosterone ›
- Losartan Potassium ›
- Ivermectin ›
- Abemaciclib ›
- Aspirin ›
- Acetaminophen ›
- Metoprolol ›
- Rosuvastatin ›
- Rivaroxaban ›
- Escitalopram ›
- Clopidogrel ›
- Atorvastatin ›
- Tadalafil ›
- Docusate ›
- Tirzepatide ›
- Ibuprofen ›
- Methamphetamine ›
- Hydroxyurea ›
- Valacyclovir ›
- Warfarin Sodium ›
- Sumatriptan ›
- Semaglutide ›
- Prednisone ›
- Lisdexamfetamine ›
- Propranolol ›
- Metformin ›
- Amitriptyline ›
- Amoxicillin ›
- Lisinopril ›
- Isotretinoin ›
- Amlodipine Besylate ›
- Methotrexate ›
- Bendamustine ›
- Bupropion ›
- Amphetamine ›
- Doxycycline ›
- Fluoxetine ›
- Acyclovir ›
- Azithromycin ›
- Lamotrigine ›
- Pregabalin ›
- Dextroamphetamine ›
- Gabapentin ›
- Acetaminophen, Codeine ›
- Quetiapine ›
- Clonazepam ›
- Levothyroxine, Liothyronine ›
- Naproxen ›
- Omeprazole ›
- Letrozole ›
- Methylene Blue ›
- Duloxetine ›
- Buspirone ›
- 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 Ketoconazole Together: Common Questions
Is it safe to take Sarsaparilla with Ketoconazole?
How was the Sarsaparilla and Ketoconazole combination checked?
Does Sarsaparilla interact with any other medications?
Does Ketoconazole interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Keep Exploring
Still Have a Question About Ketoconazole and Sarsaparilla?
Our pharmacists answer your medication & supplement questions — free.
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.