Drug & supplement interaction

German Sarsaparilla + Lanthanum Carbonate

Lanthanum Carbonate brand name: Fosrenol.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Sep 20, 2026
The bottom line No known interaction

We found no known interaction between German Sarsaparilla and Lanthanum Carbonate 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 Lanthanum Carbonate states a food rule worth keeping to.

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Interaction report

German Sarsaparilla and Lanthanum Carbonate

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 Lanthanum Carbonate and German 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.

Worth understanding: our licensed dataset holds no drug-interaction record for German Sarsaparilla at all — not against Lanthanum Carbonate, 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.

German Sarsaparilla safety at a glance

German Sarsaparill... overall Use caution Generally used in traditional medicine, but human safety data are limited and product identity can vary.
Pregnancy Avoid Not enough safety information; avoid during pregnancy.
Breastfeeding Avoid Not enough safety information; avoid while breastfeeding.

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

Still wondering about combining Lanthanum Carbonate and German Sarsaparilla? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Lanthanum Carbonate’s Own FDA Label Lists

This is not an interaction — none of it involves German Sarsaparilla. These are the most notable effects listed in the ADVERSE REACTIONS section of Lanthanum Carbonate’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. One of them is worth acting on rather than waiting out — marked below.

  • A bowel blockage Worth acting on
  • Stomach upset
  • Constipation
  • Stomach pain
  • Diarrhea
  • Vomiting
  • Nausea

From the ADVERSE REACTIONS section of the FDA label for Lanthanum Carbonate. Read the label on DailyMed › German Sarsaparilla’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no German Sarsaparilla side to compare — that is a limit of the record, not a statement that German Sarsaparilla has no side effects.

How to take them

Some Lanthanum Carbonate Products Have a Food Rule — German Sarsaparilla Should Not Break It

At least one FDA label for a product containing Lanthanum Carbonate says to take it with food. If you take German Sarsaparilla on an empty stomach out of habit, keep them separate — and take Lanthanum Carbonate with a meal where the label says to.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two Lanthanum Carbonate 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.

Do not store FOSRENOL Oral Powder for future use once mixed with food.

From the Dosage and Administration section of the FDA label we read for Lanthanum Carbonate — where that label names a specific product, the instruction is that product's. Read the label on DailyMed ›

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.

Everything else you take

See Every Supplement That Interacts With Lanthanum Carbonate

This page covers German Sarsaparilla only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Lanthanum Carbonate page lists 17 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Coffee Charcoal (moderate), European Mandrake (moderate), Glucomannan (moderate) and Guar Gum (moderate).

By severity: 1 major · 7 moderate · 9 minor.

Open the Lanthanum Carbonate interaction page

How much people look this up

Where German Sarsaparilla and Lanthanum Carbonate 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 German Sarsaparilla
Steady interest

#1,429 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Lanthanum Carbonate
Steady interest

#2,596 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. German Sarsaparilla is not yet covered by that licensed database, so its write-up cites publicly available medical sources directly (see the references below).
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every German Sarsaparilla reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The German Sarsaparilla and Lanthanum Carbonate 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 German Sarsaparilla

What is German Sarsaparilla?

  • Skin conditions
  • Joint discomfort
  • General 'blood purifier' or detox
  • Mild urinary complaints
  • Tonic for fatigue

German Sarsaparilla is a traditional herbal remedy used mainly for skin and joint complaints and as a so-called 'blood purifier,' but solid human evidence for these uses is lacking. The name is used inconsistently and may refer to different plants, so product identity can be uncertain. Talk to a pharmacist or doctor before using it, and avoid it during pregnancy and breastfeeding.

Root and rhizome · Tea, capsules, liquid extract, dried root

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

German Sarsaparilla: dosing

There is no well-established standardized dose for German Sarsaparilla. Traditional use varies widely depending on the form (tea, capsule, or liquid extract) and the specific plant used.If you choose to use it, follow the directions on the product label and do not exceed the recommended amount. A pharmacist can help you review the product and decide whether it is appropriate for you.Start low, watch for any reactions, and stop if you feel unwell.

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

Read the full German Sarsaparilla monograph & all interactions
Medication

About Lanthanum

What Is Lanthanum Used For?

Brand name: Fosrenol

Lanthanum carbonate — available as lanthanum carbonate chewable tablets and as Fosrenol in both chewable tablet and oral powder forms — is used to lower elevated serum phosphate (too much phosphate in the blood) in people with end-stage renal disease (ESRD), the most advanced stage of chronic kidney disease.

Managing high phosphate in ESRD typically involves eating less phosphate-rich food, removing phosphate through dialysis, and using a phosphate binder like lanthanum carbonate to reduce how much phosphate is absorbed from meals.

Most-Reported Side Effects for Lanthanum Carbonate

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.

Nausea 493 reports
Vomiting 480 reports
Constipation 376 reports
Sepsis 368 reports
Abdominal pain 365 reports
See full Lanthanum drug information
Keep checking

Other Drugs & German Sarsaparilla

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

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

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

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full German Sarsaparilla list.

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

German Sarsaparilla References

The 2 sources that drive our German Sarsaparilla monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. German Sarsaparilla is not covered by the licensed Natural Medicines interaction database, so its page cites these public sources directly.

  1. Herbs at a Glance — NIH NCCIH Source
  2. Herbs and Supplements — MedlinePlus Source

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 German Sarsaparilla and Lanthanum Carbonate Together: Common Questions

Is it safe to take German Sarsaparilla with Lanthanum Carbonate?
We do not list a known interaction between German Sarsaparilla and Lanthanum Carbonate. 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.
Should I take German Sarsaparilla and Lanthanum Carbonate at the same time of day?
At least one FDA label for a product containing Lanthanum Carbonate says to take it with food. If you take German Sarsaparilla on an empty stomach out of habit, keep them separate and take Lanthanum Carbonate with a meal where the label says to. Food instructions belong to the product rather than the ingredient — two Lanthanum Carbonate products can differ — so check the directions on your own box. This is about absorption, not an interaction.
Does Lanthanum Carbonate interact with any supplements?
Yes. Lanthanum Carbonate has documented interactions with 17 supplements in our database — German Sarsaparilla is not one of them. The Lanthanum Carbonate 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

German Sarsaparilla monograph Uses, safety profile, and every drug interaction in one place Lanthanum drug information The full plain-English guide to this medication Lanthanum Carbonate supplement interactions Every supplement checked against Lanthanum Carbonate, 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 2 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Lanthanum Carbonate and German Sarsaparilla?

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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.