Drug & supplement interaction

Sarsaparilla + Tolterodine

Tolterodine brand names: Detrol LA, Detrol.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 27, 2026
The bottom line No known interaction

We found no known interaction between Sarsaparilla and Tolterodine 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

Sarsaparilla and Tolterodine

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 Tolterodine 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

Sarsaparilla overall Use caution Likely low-risk in food amounts, but human safety data for supplement doses are limited.
Pregnancy Avoid Not enough safety information, so it is best avoided during pregnancy.
Breastfeeding Avoid Not enough safety information, so it is best avoided while breastfeeding.

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

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

Why No Interaction Is Listed for Tolterodine

Interactions in our licensed database are recorded against drug classes, not just single drug names. Tolterodine is filed under 4 classifications — including cytochrome p450 2d6 (cyp2d6) substrates, anticholinergic drugs, cytochrome p450 3a4 (cyp3a4) substrates. Sarsaparilla has documented interactions with 2 drug classes — the most serious being digoxin (lanoxin) (moderate) and lithium (moderate) — and none of Tolterodine’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

Sarsaparilla Does Interact With Other Medications

Sarsaparilla has 2 moderate known drug interactions in our database — Tolterodine isn’t one of them. If you take anything else, check it against the full list below.

Moderate 2 No known interaction 2,828 (incl. Tolterodine)
Taking anything else?

Check Another of Your Medications Against Sarsaparilla

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

What to actually watch for

What Sarsaparilla Itself Has Been Linked To

This is not an interaction — nothing below involves Tolterodine. It is the side-effect record for Sarsaparilla on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Sarsaparilla, this list is the first place to look. One entry is worth acting on rather than waiting out — marked below.

  • Wheezing Worth acting on Additional detail

    “Occupational exposure to sarsaparilla root dust can cause rhinitis and asthma symptoms.”

    Sarsaparilla · Natural Medicines adverse-effect record, reported in asthma.

    1 source cited
    1. 4111. Vandenplas O, Depelchin S, Toussaint G, et al. Occupational asthma caused by sarsaparilla root dust. J Allergy Clin Immunol 1996;97:1416-8. PubMed
  • A stuffy or runny nose Additional detail

    Recorded for Sarsaparilla in the same Natural Medicines adverse-effect record shown under Wheezing above.

Everything above comes from the Natural Medicines adverse-effect record for Sarsaparilla — expand a row for the licensed statement it rests on. We read the ADVERSE REACTIONS section of Tolterodine’s FDA label too, and the two lists don’t meaningfully overlap — which is why no Tolterodine column appears here.

Everything else you take

See Every Supplement That Interacts With Tolterodine

This page covers Sarsaparilla only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Tolterodine page lists 178 supplements it has a documented interaction with, worst first, each one explained.

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

By severity: 5 major · 130 moderate · 43 minor.

From our pharmacist’s overview on the Tolterodine page

“Grapefruit juice is the first thing to know about with tolterodine (Detrol, Detrol LA), the overactive bladder medicine. It blocks the main enzyme that clears the drug, so blood levels can climb and side effects can climb with them.”

Reviewed by 2 · Jul 18, 2026

Open the Tolterodine interaction page

One more smart check

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 Tolterodine, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Sarsaparilla and Tolterodine 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 Sarsaparilla
Top 25%

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

29 days ago today
Medication Tolterodine
Top half

#1,249 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 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 Tolterodine 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.
Data structure & sourcing designed and verified by .
Supplement

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.

Read the full Sarsaparilla monograph & all interactions
Medication

About Tolterodine

What Is Tolterodine Used For?

Brand names: Detrol LA, Detrol

Tolterodine — available as tablets (including Detrol and Tolterodine Tartrate tablets) and extended-release capsules (including Detrol LA and Tolterodine Tartrate extended-release capsules) — is prescribed for overactive bladder. It targets three main symptoms: a sudden, hard-to-control urge to urinate (urgency), urinating too often (frequency), and leaking urine when that urge hits (urge urinary incontinence).

All approved forms and brands share this same indication. No additional or separate uses are listed in the prescribing information for any individual product.

See full Tolterodine drug information
Keep checking

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.

0Major
2Moderate
0Minor
2,827No known interaction
2 Moderate 2,827 No interaction
Moderate

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.

Showing the 60 most looked-up of 2,827 medications checked with no known interaction — see the full Sarsaparilla list.

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

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.

  1. Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Trans. S. Klein. Boston, MA: American Botanical Council, 1998.
  2. Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Food, Drugs and Cosmetics. 2nd ed. New York, NY: John Wiley & Sons, 1996.
  3. 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.

Pharmacist Counseling Corner

Taking Sarsaparilla and Tolterodine Together: Common Questions

Is it safe to take Sarsaparilla with Tolterodine?
We do not list a known interaction between Sarsaparilla and Tolterodine. 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 Sarsaparilla and Tolterodine combination checked?
Interactions in our licensed database are recorded against drug classes. Tolterodine is filed under 4 classifications, and Sarsaparilla has documented interactions with 2 drug classes — none of Tolterodine'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 Sarsaparilla interact with any other medications?
Yes. Sarsaparilla has 2 documented drug interactions in our database — Tolterodine 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 Tolterodine interact with any supplements?
Yes. Tolterodine has documented interactions with 178 supplements in our database — Sarsaparilla is not one of them. The Tolterodine 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

Sarsaparilla monograph Uses, safety profile, and every drug interaction in one place Tolterodine drug information The full plain-English guide to this medication Tolterodine supplement interactions Every supplement checked against Tolterodine, 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 3 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Tolterodine and Sarsaparilla?

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.