Drug & supplement interaction

Oats + Atropine, Diphenoxylate

Atropine, Diphenoxylate brand names: Lomotil, Lofene.

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

We found no known interaction between Oats and Atropine, Diphenoxylate 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 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 Atropine, Diphenoxylate

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 Atropine, Diphenoxylate 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 Atropine, Diphenoxylate and Oats? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Atropine, Diphenoxylate

Interactions in our licensed database are recorded against drug classes, not just single drug names. Atropine, Diphenoxylate is filed under 3 classifications — including anticholinergic drugs, oral drugs. Oats has documented interactions with 2 drug classes — the most serious being antidiabetes drugs (moderate) and insulin (moderate) — and none of Atropine, Diphenoxylate’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 — Atropine, Diphenoxylate 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. Atropine, Diphenoxylate)
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 Atropine, Diphenoxylate 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. 3 of them are worth acting on rather than waiting out — marked below.

  • A bowel blockage Worth acting on Additional detail

    Oats

    “When consumed orally, oats provide fiber. Increasing fiber in the diet can cause flatulence, bloating, abdominal distention, and unpleasant taste. To minimize side effects, doses should be slowly titrated to the desired level.”

    Oats · Natural Medicines adverse-effect record, reported in flatulence.

    3 sources cited
    1. 12514. Lembo A, Camilleri M. Chronic constipation. N Engl J Med 2003;349:1360-8. . PubMed
    2. 4979. Cooper SG, Tracey EJ. Small-bowel obstruction caused by oat-bran bezoar. N Engl J Med 1989;320:1148-9. DOI
    3. 4985. Rosario PG, Gerst PH, Prakash K, Albu E. Dentureless distention: oat bran bezoars cause obstruction. J Am Geriatr Soc 1990;38:608. PubMed

    Atropine, Diphenoxylate

    Listed in the ADVERSE REACTIONS section of the FDA label for Atropine, Diphenoxylate. Read the label on DailyMed ›

  • A severe allergic reaction / Hives 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
    1. 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

    Atropine, Diphenoxylate

    Listed in the ADVERSE REACTIONS section of the FDA label for Atropine, Diphenoxylate. Read the label on DailyMed ›

  • Itching 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
    1. 12515. De Paz Arranz S, Perez Montero A, Remon LZ, Molero MI. Allergic contact urticaria to oatmeal. Allergy 2002;57:1215. . PubMed
    2. 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

    Atropine, Diphenoxylate

    Listed in the ADVERSE REACTIONS section of the FDA label for Atropine, Diphenoxylate. Read the label on DailyMed ›

Reported for Oats but not commonly for Atropine, Diphenoxylate: bloating or gas, an allergic reaction, a skin rash and shortness of breath.

Effects for Atropine, Diphenoxylate 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

Everything else you take

See Every Supplement That Interacts With Atropine, Diphenoxylate

This page covers Oats only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Atropine, Diphenoxylate page lists 47 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Henbane (major), Scopolia (major), Angel's Trumpet (moderate) and Bacopa (moderate).

By severity: 3 major · 32 moderate · 12 minor.

From our pharmacist’s overview on the Atropine, Diphenoxylate page

“People reach for Lomotil (atropine with diphenoxylate) during a bout of diarrhea, and the supplement most likely to sit in the same cabinet, activated charcoal, is also one of its three major-rated interactions, since charcoal can soak up the drug in the gut and blunt its effect. This is a list to treat with genuine care.”

Reviewed by 2 · Jul 18, 2026

Open the Atropine, Diphenoxylate 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 Atropine, Diphenoxylate, 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 Atropine, Diphenoxylate 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%

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

29 days ago today
Medication Atropine, Diphenoxylate
Top 25%

#458 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 Atropine, Diphenoxylate 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 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
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 Atropine, Diphenoxylate, 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.

  1. Cooper SG, Tracey EJ. Small-bowel obstruction caused by oat-bran bezoar. N Engl J Med 1989;320:1148-9. DOI
  2. 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
  3. 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.
  4. Rosario PG, Gerst PH, Prakash K, Albu E. Dentureless distention: oat bran bezoars cause obstruction. J Am Geriatr Soc 1990;38:608. PubMed
  5. Food and Drug Administration. Food labeling: health claims: oats and coronary heart disease. Fed Regist 1996;61:296-313.
  6. 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.
  7. 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
  8. Lembo A, Camilleri M. Chronic constipation. N Engl J Med 2003;349:1360-8. . PubMed
  9. De Paz Arranz S, Perez Montero A, Remon LZ, Molero MI. Allergic contact urticaria to oatmeal. Allergy 2002;57:1215. . PubMed
  10. 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
  11. 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
  12. 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
  13. 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 Atropine, Diphenoxylate Together: Common Questions

Is it safe to take Oats with Atropine, Diphenoxylate?
We do not list a known interaction between Oats and Atropine, Diphenoxylate. 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 Atropine, Diphenoxylate have any of the same side effects?
Yes — our sources link each of them separately to 4 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.
How was the Oats and Atropine, Diphenoxylate combination checked?
Interactions in our licensed database are recorded against drug classes. Atropine, Diphenoxylate is filed under 3 classifications, and Oats has documented interactions with 2 drug classes — none of Atropine, Diphenoxylate'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 — Atropine, Diphenoxylate 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 Atropine, Diphenoxylate interact with any supplements?
Yes. Atropine, Diphenoxylate has documented interactions with 47 supplements in our database — Oats is not one of them. The Atropine, Diphenoxylate 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 Atropine, Diphenoxylate supplement interactions Every supplement checked against Atropine, Diphenoxylate, 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 Atropine, Diphenoxylate 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.