Drug & supplement interaction

Anhydrous Crystalline Maltose + Sevelamer

Sevelamer brand name: Renagel.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between Anhydrous Crystalline Maltose and Sevelamer 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 Sevelamer states a food rule worth keeping to.

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Interaction report

Anhydrous Crystalline Maltose and Sevelamer

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 Sevelamer and Anhydrous Crystalline Maltose 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.

Anhydrous Crystalline Maltose safety at a glance

Anhydrous Crystall... overall Use caution Generally well tolerated in studies, but it is a sugar, so people with diabetes should be cautious.
Pregnancy Use caution Not well studied as a supplement in pregnancy; check with your doctor before use.
Breastfeeding Use caution Not well studied during breastfeeding; check with your doctor before use.

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

Still wondering about combining Sevelamer and Anhydrous Crystalline Maltose? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Sevelamer

Interactions in our licensed database are recorded against drug classes, not just single drug names. Sevelamer is filed under 2 classifications — including oral drugs. Anhydrous Crystalline Maltose has documented interactions with 1 drug class — the most serious being antidiabetes drugs (minor) — and none of Sevelamer’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

Anhydrous Crystalline Maltose Does Interact With Other Medications

Anhydrous Crystalline Maltose has 86 minor known drug interactions in our database — Sevelamer isn’t one of them. If you take anything else, check it against the full list below.

Minor 86 No known interaction 2,744 (incl. Sevelamer)
Taking anything else?

Check Another of Your Medications Against Anhydrous Crystalline Maltose

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

What to actually watch for

What Sevelamer’s Own FDA Label Lists

This is not an interaction — none of it involves Anhydrous Crystalline Maltose. These are the most notable effects listed in the ADVERSE REACTIONS section of Sevelamer’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. 3 of them are worth acting on rather than waiting out — marked below.

  • A bowel blockage Worth acting on
  • Bleeding or bruising Worth acting on
  • An allergic reaction Worth acting on
  • Bloating or gas
  • Stomach upset
  • Constipation
  • Itching
  • Stomach pain
  • Diarrhea
  • A skin rash

Showing the 10 most notable of 12 label-listed effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

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

How to take them

Some Sevelamer Products Have a Food Rule — Anhydrous Crystalline Maltose Should Not Break It

At least one FDA label for a product containing Sevelamer says to take it with food. If you take Anhydrous Crystalline Maltose on an empty stomach out of habit, keep them separate — and take Sevelamer 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 Sevelamer 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.

2 DOSAGE AND ADMINISTRATION Starting dose of Renvela is 0.8 or 1.6 grams administered orally three times per day with meals based on serum phosphorus levels for adult patients and based on body surface area (BSA) category for pediatric patients.

From the Dosage and Administration section of the FDA label we read for Sevelamer — 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 Sevelamer

This page covers Anhydrous Crystalline Maltose only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Sevelamer page lists 18 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 · 10 minor.

From our pharmacist’s overview on the Sevelamer page

“Kidney patients who take sevelamer (Renagel) to control phosphorus have a real reason to pause over this page, and activated charcoal is why. It carries the only major rating here because it can trap medicines in the gut and sharply cut the amount the body actually gets.”

Reviewed by 2 · Jul 18, 2026

Open the Sevelamer interaction page

How much people look this up

Where Anhydrous Crystalline Maltose and Sevelamer 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 Anhydrous Crystalline Maltose
Steady interest

#1,033 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Sevelamer
Steady interest

#2,712 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 Anhydrous Crystalline Maltose reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Anhydrous Crystalline Maltose and Sevelamer 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 Anhydrous Crystalline Maltose

What is Anhydrous Crystalline Maltose?

Anhydrous Crystalline Maltose
  • Dry mouth (xerostomia)
  • Sjögren syndrome
  • Dry mouth from medications
  • Food stabilizer and texturizer

Anhydrous crystalline maltose is a starch-derived sugar (also called malt sugar) studied mainly as a slow-dissolving lozenge to ease dry mouth, including in people with Sjögren syndrome. Some studies suggest it may modestly improve saliva flow, but the overall evidence is limited. It appears generally well tolerated, but talk with your pharmacist or doctor before using it, especially if you have diabetes.

Disaccharide sugar derived from starch · Dissolving lozenges, tablets, powder

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

Anhydrous Crystalline Maltose: dosing

There is no official, standardized supplement dose for anhydrous crystalline maltose. Do not assume more is better.

From our Anhydrous Crystalline Maltose monograph — the full record covers uses, side effects and every documented interaction.

Read the full Anhydrous Crystalline Maltose monograph & all interactions
Medication

About Sevelamer

What Is Sevelamer Used For?

Brand name: Renagel

Sevelamer is used to control serum phosphorus (the level of phosphorus in your blood) in people with chronic kidney disease (CKD) who are on dialysis. High phosphorus is a serious problem for dialysis patients and needs to be managed with medication and diet.

Sevelamer carbonate tablets and Renvela® (sevelamer carbonate) oral suspension are approved for adults and children 6 years of age and older. Sevelamer hydrochloride tablets are indicated for adults with CKD on dialysis; their safety and effectiveness in CKD patients not on dialysis have not been studied.

See full Sevelamer drug information
Keep checking

Other Drugs & Anhydrous Crystalline Maltose

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

0Major
0Moderate
86Minor
2,743No known interaction
86 Minor 2,743 No interaction
Minor

86 interactions

Showing 60 of 86 minor interactions — see all 86 on the Anhydrous Crystalline Maltose page.

No interaction 2,743 drugs checked — show the list

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

Showing the 60 most looked-up of 2,743 medications checked with no known interaction — see the full Anhydrous Crystalline Maltose list.

See the full Anhydrous Crystalline Maltose interactions page
See every supplement checked against Sevelamer, ranked by severity
Evidence & sources

Anhydrous Crystalline Maltose References

The 2 references that drive our Anhydrous Crystalline Maltose 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. Fox, P. C., Cummins, M. J., and Cummins, J. M. Use of orally administered anhydrous crystalline maltose for relief of dry mouth. J Altern Complement Med 2001;7(1):33-43. PubMed
  2. Fox, P. C., Cummins, M. J., and Cummins, J. M. A third study on the use of orally administered anhydrous crystalline maltose for relief of dry mouth in primary Sjogren's syndrome. J Altern Complement Med 2002;8(5):651-659.

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 Anhydrous Crystalline Maltose and Sevelamer Together: Common Questions

Is it safe to take Anhydrous Crystalline Maltose with Sevelamer?
We do not list a known interaction between Anhydrous Crystalline Maltose and Sevelamer. 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 Anhydrous Crystalline Maltose and Sevelamer at the same time of day?
At least one FDA label for a product containing Sevelamer says to take it with food. If you take Anhydrous Crystalline Maltose on an empty stomach out of habit, keep them separate and take Sevelamer with a meal where the label says to. Food instructions belong to the product rather than the ingredient — two Sevelamer products can differ — so check the directions on your own box. This is about absorption, not an interaction.
How was the Anhydrous Crystalline Maltose and Sevelamer combination checked?
Interactions in our licensed database are recorded against drug classes. Sevelamer is filed under 2 classifications, and Anhydrous Crystalline Maltose has documented interactions with 1 drug class — none of Sevelamer'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 Anhydrous Crystalline Maltose interact with any other medications?
Yes. Anhydrous Crystalline Maltose has 86 documented drug interactions in our database — Sevelamer 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 Sevelamer interact with any supplements?
Yes. Sevelamer has documented interactions with 18 supplements in our database — Anhydrous Crystalline Maltose is not one of them. The Sevelamer 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

Anhydrous Crystalline Maltose monograph Uses, safety profile, and every drug interaction in one place Sevelamer drug information The full plain-English guide to this medication Sevelamer supplement interactions Every supplement checked against Sevelamer, 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 Sevelamer and Anhydrous Crystalline Maltose?

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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.