Drug & supplement interaction

Oats + Belumosudil Mesylate

Belumosudil Mesylate brand name: Rezurock.

No Known Interaction

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Updated July 2026 · Pair last verified Sep 13, 2026

The bottom line No known interaction

We found no known interaction between Oats and Belumosudil Mesylate 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 Belumosudil Mesylate states a food rule worth keeping to, and the two are separately associated with some of the same side effects, which would make a new symptom harder to attribute to one or the other.

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Interaction report

Oats and Belumosudil Mesylate

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 Belumosudil Mesylate and Oats 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.

Oats safety at a glance

Oats overall Generally safe Oats as a food are safe for most people when eaten as part of a normal diet.

Pregnancy Likely Safe When used orally in food amounts. Read the full pregnancy detail

Breastfeeding Likely Safe When used orally in food amounts. Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Belumosudil Mesylate and Oats? Ask Dr. Brian Staiger, PharmD, BCPS directly ›

How we checked

Why No Interaction Is Listed for Belumosudil Mesylate

Interactions in our licensed database are recorded against drug classes, not just single drug names. Belumosudil Mesylate is filed under 2 classifications — cytochrome p450 3a4 (cyp3a4) substrates, oral drugs. Oats has documented interactions with 2 drug classes — the most serious being antidiabetes drugs (moderate) and insulin (moderate) — and none of Belumosudil Mesylate’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

Oats Does Interact With Other Medications

Oats has 86 moderate known drug interactions in our database — Belumosudil Mesylate isn’t one of them. If you take anything else, check it against the full list below.

Moderate 86 No known interaction 2,744 (incl. Belumosudil Mesylate)

Taking anything else?

Check Another of Your Medications Against Oats

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

What to actually watch for

No Interaction Found — But Data Suggests Oats and Belumosudil Mesylate May Share Several of the Same Side Effects

This is not an interaction. Neither one changes how your body handles the other, and nothing here says they react together. What our sources do show is that each has separately been linked to the effects below — so taking both can make those effects more likely to turn up, and harder to pin on one or the other if they do. One of them is worth acting on rather than waiting out — marked below.

Shortness of breath Worth acting on Additional detail
Oats
“In a case report, a 45-year-old male developed acute generalized urticaria, facial angioedema, and dyspnea immediately after consuming oat flour. The reaction resolved after emergency care for anaphylaxis. Further investigation revealed an IgE-mediated hypersensitivity reaction to oat proteins.”

Oats · Natural Medicines adverse-effect record, reported in urticaria.
1 source cited

113490. González-Afonso M, Cañas JA, Sastre B, et al. A Case of Anaphylaxis After Ingestion of Oats: Research Into New Allergens. J Investig Allergol Clin Immunol 2022;32(6):506-508. PubMed
Belumosudil Mesylate

Listed in the ADVERSE REACTIONS section of the FDA label for Belumosudil Mesylate. Read the label on DailyMed ›
Itching / A skin rash Additional detail
Oats
“Topically, oat-containing preparations can cause contact dermatitis. Redness, burning, and itchiness have also been reported.”

Oats · Natural Medicines adverse-effect record, reported in dermatitis.
2 sources cited

12515. De Paz Arranz S, Perez Montero A, Remon LZ, Molero MI. Allergic contact urticaria to oatmeal. Allergy 2002;57:1215. . PubMed

103340. Sobhan M, Hojati M, Vafaie SY, Ahmadimoghaddam D, Mohammadi Y, Mehrpooya M. The efficacy of colloidal oatmeal cream 1% as add-on therapy in the management of chronic irritant hand eczema: A double-blind study. Clin Cosmet Investig Dermatol. 2020;13:241-25
Belumosudil Mesylate

Listed in the ADVERSE REACTIONS section of the FDA label for Belumosudil Mesylate. Read the label on DailyMed ›

Reported for Oats but not commonly for Belumosudil Mesylate: a bowel blockage, bloating or gas, an allergic reaction and a severe allergic reaction.

Effects for Belumosudil Mesylate come from the ADVERSE REACTIONS section of its FDA label; effects for Oats come from the Natural Medicines adverse-effect record, quoted above. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

Special populations

Oats in Pregnancy & Breastfeeding

Pregnancy And Lactation Likely Safe

When used orally in food amounts.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center

How to take them

Some Belumosudil Mesylate Products Have a Food Rule — Oats Should Not Break It

At least one FDA label for a product containing Belumosudil Mesylate says to take it with food. If you take Oats on an empty stomach out of habit, keep them separate — and take Belumosudil Mesylate 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 Belumosudil Mesylate 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 Recommended Dosage : 200 mg taken orally once daily with food.

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

This page covers Oats only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Belumosudil Mesylate page lists 138 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Grapefruit (major), St. John's Wort (major), Acacia Rigidula (moderate) and Adrafinil (moderate).

By severity: 3 major · 94 moderate · 41 minor.

From our pharmacist’s overview on the Belumosudil Mesylate page

“Most people taking belumosudil (Rezurock) are managing chronic graft-versus-host disease after a stem cell transplant, and many reach for supplements hoping for extra support. This list warrants real vigilance.”

Reviewed by 2 · Jul 18, 2026

Open the Belumosudil Mesylate interaction page

One more smart check

Taking Oats as Part of a Dietary Supplement Product? Check It for Interactions

We hold 2,183 real supplement products containing Oats, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Oats. Even though Oats itself has no known interaction with Belumosudil Mesylate, 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 Oats and Belumosudil Mesylate 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 Oats

Top 10%

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

29 days ago today

Medication Belumosudil Mesylate

Top 25%

#638 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 Oats reference on this page ↓
Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Oats and Belumosudil Mesylate 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 Dr. Brian Staiger, PharmD, BCPS.

Supplement

About Oats

What is Oats?

Lowering cholesterol
Heart and digestive health
Soothing itchy or irritated skin
Blood sugar support
Anxiety and stress (oat straw, traditional)

Oats are a well-studied whole grain whose soluble fiber (beta-glucan) can help lower cholesterol and support heart health when eaten regularly. As a food, oats are safe for most people, and colloidal oatmeal is widely used to soothe skin. Evidence for oat straw supplements (for anxiety, energy, or focus) is much weaker.

Avena sativa · Poaceae · Seeds (oat grain), oat bran, and the green tops/straw (oat straw) · Oatmeal and whole grains, oat bran, colloidal oatmeal (topical), capsules, tinctures, and teas (oat straw)

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

Oats: dosing

There is no single standardized dose for oats, and the right amount depends on the form and your goal. For cholesterol benefits, public health guidance generally points to getting a few grams of oat beta-glucan per day from foods like oatmeal and oat bran, spread across meals.For supplements, teas, or oat straw products, there is no well-established dose, so follow the directions on the product label. Topical colloidal oatmeal products should be used as directed on the package.

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

Read the full Oats monograph & all interactions

Medication

About Belumosudil

What Is Belumosudil Used For?

Brand name: Rezurock

Rezurock (belumosudil) is used to treat chronic graft-versus-host disease (chronic GVHD) — a serious immune condition that can occur after a stem cell or bone marrow transplant, where the donor's immune cells attack the recipient's body. It is specifically for patients aged 12 and older whose chronic GVHD has not responded to at least two prior systemic (whole-body) treatments.

See full Belumosudil drug information

Keep checking

Other Drugs & Oats

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

0Major

86Moderate

0Minor

2,743No known interaction

86 Moderate 2,743 No interaction

Moderate

86 interactions

Showing 60 of 86 moderate interactions — see all 86 on the Oats page.

No interaction 2,743 drugs checked — show the list

We also checked Oats 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 Oats list.

See the full Oats interactions page

See every supplement checked against Belumosudil Mesylate, ranked by severity

Evidence & sources

Oats References

The 13 references that drive our Oats 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.

Cooper SG, Tracey EJ. Small-bowel obstruction caused by oat-bran bezoar. N Engl J Med 1989;320:1148-9. DOI
Pick ME, Hawrysh ZJ, Gee MI, et al. Oat bran concentrate bread products improve long-term control of diabetes: a pilot study. J Am Diet Assoc 1996;96:1254-61. PubMed
Braaten JT, Scott FW, Wood PJ, et al. High beta-glucan oat bran and oat gum reduce postprandial blood glucose and insulin in subjects with and without type 2 diabetes. Diabet Med 1994;11:312-8.
Rosario PG, Gerst PH, Prakash K, Albu E. Dentureless distention: oat bran bezoars cause obstruction. J Am Geriatr Soc 1990;38:608. PubMed
Food and Drug Administration. Food labeling: health claims: oats and coronary heart disease. Fed Regist 1996;61:296-313.
Foulke J. FDA Allows Whole Oat Foods To Make Health Claim on Reducing the Risk of Heart Disease. FDA Talk Paper. 1997. Available at: http://www.fda.gov/bbs/topics/ANSWERS/ANS00782.html.
Chandalia M, Garg A, Lutjohann D, et al. Beneficial effects of high dietary fiber intake in patients with type 2 diabetes mellitus. N Engl J Med 2000;342:1392-8. PubMed
Lembo A, Camilleri M. Chronic constipation. N Engl J Med 2003;349:1360-8. . PubMed
De Paz Arranz S, Perez Montero A, Remon LZ, Molero MI. Allergic contact urticaria to oatmeal. Allergy 2002;57:1215. . PubMed
Delgado G, Kleber ME, Krämer BK, et al. Dietary intervention with oatmeal in patients with uncontrolled type 2 diabetes mellitus - A crossover study. Exp Clin Endocrinol Diabetes. 2019;127(9):623-629. PubMed
Sobhan M, Hojati M, Vafaie SY, Ahmadimoghaddam D, Mohammadi Y, Mehrpooya M. The efficacy of colloidal oatmeal cream 1% as add-on therapy in the management of chronic irritant hand eczema: A double-blind study. Clin Cosmet Investig Dermatol. 2020;13:241-25
Hou Q, Li Y, Li L, Cheng G, Sun X, Li S, Tian H. The metabolic effects of oats intake in patients with type 2 diabetes: A systematic review and meta-analysis. Nutrients. 2015;7(12):10369-87. PubMed
González-Afonso M, Cañas JA, Sastre B, et al. A Case of Anaphylaxis After Ingestion of Oats: Research Into New Allergens. J Investig Allergol Clin Immunol 2022;32(6):506-508. 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 Oats and Belumosudil Mesylate Together: Common Questions

Is it safe to take Oats with Belumosudil Mesylate?

We do not list a known interaction between Oats and Belumosudil Mesylate. 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.

Do Oats and Belumosudil Mesylate have any of the same side effects?

Yes — our sources link each of them separately to 3 of the same effects. That is not an interaction: neither changes how your body handles the other. It does mean that if one of those effects turns up, it can be harder to tell which one is behind it. They are listed on this page with the source behind each.

Should I take Oats and Belumosudil Mesylate at the same time of day?

At least one FDA label for a product containing Belumosudil Mesylate says to take it with food. If you take Oats on an empty stomach out of habit, keep them separate and take Belumosudil Mesylate with a meal where the label says to. Food instructions belong to the product rather than the ingredient — two Belumosudil Mesylate products can differ — so check the directions on your own box. This is about absorption, not an interaction.

How was the Oats and Belumosudil Mesylate combination checked?

Interactions in our licensed database are recorded against drug classes. Belumosudil Mesylate is filed under 2 classifications, and Oats has documented interactions with 2 drug classes — none of Belumosudil Mesylate'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 Oats interact with any other medications?

Yes. Oats has 86 documented drug interactions in our database — Belumosudil Mesylate 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 Belumosudil Mesylate interact with any supplements?

Yes. Belumosudil Mesylate has documented interactions with 138 supplements in our database — Oats is not one of them. The Belumosudil Mesylate 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

Oats monograph Uses, safety profile, and every drug interaction in one place Belumosudil drug information The full plain-English guide to this medication Belumosudil Mesylate supplement interactions Every supplement checked against Belumosudil Mesylate, 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 13 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Belumosudil Mesylate and Oats?

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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.