Drug & supplement interaction

Dill + Dextromethorphan

Dextromethorphan brand names: Hold, Benylin Adult, Benylin Pediatric, Theraflu Thin Strips Long Acting Cough, Neo Citran Thin Strips Cough.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Oct 4, 2026
The bottom line No known interaction

We found no known interaction between Dill and Dextromethorphan 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

Dill and Dextromethorphan

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 Dextromethorphan and Dill 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.

Dill safety at a glance

Dill overall Generally safe Generally safe in the amounts used in food.
Pregnancy Possibly Unsafe When used in medicinal amounts. Dill seed is used to stimulate menstrual flow. Theoretically, dill seed might adversely affect pregnancy. Read the full pregnancy detail
Breastfeeding Use caution Food amounts are likely fine, but the safety of medicinal doses is not well studied.

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 Dextromethorphan and Dill? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Dextromethorphan

Interactions in our licensed database are recorded against drug classes, not just single drug names. Dextromethorphan is filed under 6 classifications — including serotonergic drugs, serotonergic drugs, cytochrome p450 2d6 (cyp2d6) substrates. Dill has documented interactions with 2 drug classes — the most serious being antidiabetes drugs (moderate) and lithium (moderate) — and none of Dextromethorphan’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

Dill Does Interact With Other Medications

Dill has 87 moderate known drug interactions in our database — Dextromethorphan isn’t one of them. If you take anything else, check it against the full list below.

Moderate 87 No known interaction 2,743 (incl. Dextromethorphan)
Taking anything else?

Check Another of Your Medications Against Dill

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

What to actually watch for

What Dill Itself Has Been Linked To

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

  • A severe allergic reaction Worth acting on Additional detail

    “Orally, there are case reports of individuals allergic to dill. In one case, symptoms, including swelling around the eyes, itching, rash, and chapped lips, occurred after a delay of 12 hours. In another case, immediate symptoms of anaphylaxis, as well as vomiting and diarrhea, occurred following intake and inhalation of foods cooked with dill.

    Topically, dill has resulted in contact dermatitis.”

    Dill · Natural Medicines adverse-effect record, reported in dermatitis.

    4 sources cited
    1. 47751. Freeman, G. L. Allergy to fresh dill. Allergy 1999;54(5):531-532. PubMed
    2. 47753. Chiu, A. M. and Zacharisen, M. C. Anaphylaxis to dill. Ann Allergy Asthma Immunol. 2000;84(5):559-560.
    3. 47767. Monteseirin, J., Perez-Formoso, J. L., Sanchez-Hernandez, M. C., Hernandez, M., Camacho, M. J., Bonilla, I., Guardia, P., and Conde, J. Occupational contact dermatitis to dill. Allergy 2002;57(9):866-867. PubMed
    4. 47773. Monteseirin, J., Perez-Formoso, J. L., Hernandez, M., Sanchez-Hernandez, M. C., Camacho, M. J., Bonilla, I., Chaparro, A., and Conde, J. Contact urticaria from dill. Contact Dermatitis 2003;48(5):275. PubMed
  • Sun sensitivity Additional detail

    “Orally, dill is well tolerated when used in amounts commonly found in foods. Dill seems to be well tolerated when used as medicine (12). However, a thorough evaluation of safety outcomes has not been conducted. Some people are allergic to dill.

    Topically, photodermatosis is possible after contact with juice from freshly harvested plants (19). Dill can also cause contact dermatitis (19,47767, 47773).”

    Dill · Natural Medicines adverse-effect record, reported in dermatitis.

    5 sources cited
    1. 4912. Electronic Code of Federal Regulations. Title 21. Part 182 -- Substances Generally Recognized As Safe. Available at: https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?CFRPart=182
    2. 12. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
    3. 47751. Freeman, G. L. Allergy to fresh dill. Allergy 1999;54(5):531-532. PubMed
    4. 47753. Chiu, A. M. and Zacharisen, M. C. Anaphylaxis to dill. Ann Allergy Asthma Immunol. 2000;84(5):559-560.
    5. 19. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  • Itching / Swelling / Diarrhea / Vomiting Additional detail

    Recorded for Dill in the same Natural Medicines adverse-effect record shown under A severe allergic reaction above.

  • A skin rash Additional detail

    Recorded for Dill in the same Natural Medicines adverse-effect record shown under Sun sensitivity above.

Everything above comes from the Natural Medicines adverse-effect record for Dill — expand a row for the licensed statement it rests on. We haven’t matched Dextromethorphan to its FDA label in our system yet, so we can’t compare its own side-effect list here — the leaflet that comes with your prescription is the authoritative list for Dextromethorphan.

Special populations

Dill in Pregnancy & Breastfeeding

Pregnancy Possibly Unsafe

When used in medicinal amounts. Dill seed is used to stimulate menstrual flow. Theoretically, dill seed might adversely affect pregnancy.

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

From our Q&A

Questions About Dill or Dextromethorphan

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Dill or Dextromethorphan, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Dextromethorphan

This page covers Dill only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Dextromethorphan page lists 171 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Grapefruit (major), Lithium (major), St. John's Wort (major) and 1,3-dmaa (moderate).

By severity: 4 major · 125 moderate · 42 minor.

From our pharmacist’s overview on the Dextromethorphan page

“A glass of grapefruit juice can push dextromethorphan (Benylin, Hold, and other cough medicines) to higher levels than intended, one of four major-rated entries among the 171 supplements and herbs on file, and the list as a whole warrants real care. Most interactions trace back to the liver enzymes (CYP3A4 and CYP2D6) that clear dextro…”

Reviewed by 2 · Jul 18, 2026

Open the Dextromethorphan interaction page

One more smart check

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

We hold 123 real supplement products containing Dill, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Dill. Even though Dill itself has no known interaction with Dextromethorphan, 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 Dill and Dextromethorphan 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 Dill
Top half

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

29 days ago today
Medication Dextromethorphan
Top 25%

#310 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 Dill reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified October 4, 2026. The Dill and Dextromethorphan records this page draws on were last updated July 11, 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 Dill

What is Dill?

  • Digestive upset and gas
  • Colic in infants (traditional)
  • Stimulating appetite
  • Bad breath
  • Menstrual discomfort

Dill is a common culinary herb that has long been used in traditional medicine for digestive complaints, but solid human evidence for any medicinal use is limited. It is generally considered safe in normal food amounts, while concentrated supplements or essential oil should be used with caution and discussed with a pharmacist or doctor.

Anethum graveolens · Apiaceae · Leaves (dill weed), seeds, and essential oil · Fresh or dried herb, seeds, tea, essential oil, capsules/extracts

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

Dill: dosing

There is no official or standardized medicinal dose for dill. As a food and seasoning, it is used freely to taste. As a tea, the seeds are sometimes steeped in hot water.For dill supplements, capsules, or extracts, the best advice is to follow the directions on the product label, since strength varies between products.

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

Read the full Dill monograph & all interactions
Medication

About Dextromethorphan

What Is Dextromethorphan Used For?

Brand names: Hold, Benylin Adult, Benylin Pediatric, Theraflu Thin Strips Long Acting Cough, Neo Citran Thin Strips Cough

Dextromethorphan temporarily relieves cough due to minor throat and bronchial irritation. This can happen with the common cold or from inhaled irritants.

Some products are also labeled to help you get to sleep by reducing the urge to cough. Some labels also list helping reduce how intense the coughing is. Honey Works syrup, Premier Value Tussin Cough and CVS Long Acting Cough liquids are also labeled to help loosen phlegm (mucus) and thin bronchial secretions so they drain from the bronchial tubes.

Most-Reported Side Effects for Dextromethorphan

From FAERS, the FDA’s public side-effect reporting system (58,576 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Dizziness 3,563 reports
Diarrhea 3,371 reports
Nausea 3,324 reports
Dyspnea 3,103 reports
Fatigue 3,078 reports
See full Dextromethorphan drug information
Keep checking

Other Drugs & Dill

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

0Major
87Moderate
0Minor
2,742No known interaction
87 Moderate 2,742 No interaction
Moderate

87 interactions

Showing 60 of 87 moderate interactions — see all 87 on the Dill page.

No interaction 2,742 drugs checked — show the list

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

Showing the 60 most looked-up of 2,742 medications checked with no known interaction — see the full Dill list.

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

Dill References

The 10 references that drive our Dill 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. Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Food, Drugs and Cosmetics. 2nd ed. New York, NY: John Wiley & Sons, 1996.
  2. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  3. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  4. Electronic Code of Federal Regulations. Title 21. Part 182 -- Substances Generally Recognized As Safe. Available at: https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?CFRPart=182
  5. Freeman, G. L. Allergy to fresh dill. Allergy 1999;54(5):531-532. PubMed
  6. Chiu, A. M. and Zacharisen, M. C. Anaphylaxis to dill. Ann Allergy Asthma Immunol. 2000;84(5):559-560.
  7. Monteseirin, J., Perez-Formoso, J. L., Sanchez-Hernandez, M. C., Hernandez, M., Camacho, M. J., Bonilla, I., Guardia, P., and Conde, J. Occupational contact dermatitis to dill. Allergy 2002;57(9):866-867. PubMed
  8. Monteseirin, J., Perez-Formoso, J. L., Hernandez, M., Sanchez-Hernandez, M. C., Camacho, M. J., Bonilla, I., Chaparro, A., and Conde, J. Contact urticaria from dill. Contact Dermatitis 2003;48(5):275. PubMed
  9. Panda, S. The effect of Anethum graveolens L. (dill) on corticosteroid induced diabetes mellitus: involvement of thyroid hormones. Phytother.Res 2008;22(12):1695-1697.
  10. Madani H, Mahmoodabady NA Vahdati A. Effects of hydroalchoholic [sic] extract of Anethum graveolens (DILL) on plasma glucose an [sic] lipid levels in diabetes induced rats. Iranian Journal of Diabetes & Lipid Disorders 2006;5(2):E13.

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 Dill and Dextromethorphan Together: Common Questions

Is it safe to take Dill with Dextromethorphan?
We do not list a known interaction between Dill and Dextromethorphan. 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 Dill and Dextromethorphan combination checked?
Interactions in our licensed database are recorded against drug classes. Dextromethorphan is filed under 6 classifications, and Dill has documented interactions with 2 drug classes — none of Dextromethorphan'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 Dill interact with any other medications?
Yes. Dill has 87 documented drug interactions in our database — Dextromethorphan 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 Dextromethorphan interact with any supplements?
Yes. Dextromethorphan has documented interactions with 171 supplements in our database — Dill is not one of them. The Dextromethorphan 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

Dill monograph Uses, safety profile, and every drug interaction in one place Dextromethorphan drug information The full plain-English guide to this medication Dextromethorphan supplement interactions Every supplement checked against Dextromethorphan, 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 10 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Dextromethorphan and Dill?

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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.