Drug & supplement interaction

Dill + Colesevelam

Colesevelam brand names: WelChol, Lodalis.

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

We found no known interaction between Dill and Colesevelam 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 Colesevelam 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.

Know someone taking this? Share
Facebook Post Reddit Email
On this page
Interaction report

Dill and Colesevelam

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

Why No Interaction Is Listed for Colesevelam

Interactions in our licensed database are recorded against drug classes, not just single drug names. Colesevelam is filed under a single classification — oral drugs. Dill has documented interactions with 2 drug classes — the most serious being antidiabetes drugs (moderate) and lithium (moderate) — and none of Colesevelam’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 — Colesevelam 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. Colesevelam)
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

No Interaction Found — But Data Suggests Dill and Colesevelam 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.

  • A skin rash Additional detail

    Dill

    “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.

    “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

    Colesevelam

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

  • Vomiting Additional detail

    Dill

    Recorded for Dill in the same Natural Medicines adverse-effect record shown under A skin rash above.

    Colesevelam

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

Reported for Dill but not commonly for Colesevelam: sun sensitivity, a severe allergic reaction, diarrhea and swelling.

Effects for Colesevelam come from the ADVERSE REACTIONS section of its FDA label; effects for Dill come from the Natural Medicines adverse-effect record, quoted above. Where a percentage is shown, it is the share of 2,014 voluntary FDA FAERS reports for Colesevelam that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

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

How to take them

Some Colesevelam Products Have a Food Rule — Dill Should Not Break It

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

Colesevelam hydrochloride should be taken as follows ( 2.2 , 2.4 ): Tablets Take 6 tablets once daily or 3 tablets twice daily with a meal and liquid.

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

Overlapping uses

What Colesevelam Is Prescribed For, and What Dill Has Been Studied For

These two come up together because they touch the same health topic — not because they do the same job. Colesevelam is a prescription medicine with approved uses on its FDA label. Dill is a supplement: what follows is what researchers have looked at it for, and how strong that evidence is.

Colesevelam is prescribed for: Colesevelam is used alongside diet and exercise to reduce high LDL cholesterol (the "bad" cholesterol) in adults with primary hyperlipidemia (high cholesterol). It is also approved to lower LDL cholesterol in boys and girls aged 10–17 who have heterozygous familial hypercholesterolemia (HeFH) — an inherited condition that causes very high cholesterol — when diet and lifestyle changes alone haven't worked. Colesevelam tablets and oral suspension (Welchol and colesevelam hydrochloride products) are also used to improve blood sugar control in adults with type 2 diabetes, as an add-on to diet and exercise. Colesevelam is not for type 1 diabetes or diabetic ketoacidosis.

Dill has been studied for:

  • Hyperlipidemia studied, not established Dill has been studied for this. Natural Medicines rates the evidence: Insufficient Reliable Evidence To Rate Read what the research shows

    Dill for hyperlipidemia

    Preliminary clinical research in hyperlipidemic patients with coronary artery disease shows that taking dill 650 mg orally twice daily for 6 weeks in addition to following a cholesterol-lowering diet does not improve levels of total cholesterol, low-density lipoprotein (LDL) cholesterol, high-density lipoprotein (HDL) cholesterol, or triglycerides.

    3 sources cited
    1. 47790. Kojuri, J., Vosoughi, A. R., and Akrami, M. Effects of anethum graveolens and garlic on lipid profile in hyperlipidemic patients. Lipids Health Dis. 2007;6:5. PubMed
    2. 112061. Haidari F, Zakerkish M, Borazjani F, Ahmadi Angali K, Amoochi Foroushani G. The effects of Anethum graveolens (dill) powder supplementation on clinical and metabolic status in patients with type 2 diabetes. Trials 2020;21(1):483. PubMed
    3. 112062. Mousavi SM, Beatriz Pizarro A, Akhgarjand C, et al. The effects of Anethum graveolens (dill) supplementation on lipid profile and glycemic control: a systematic review and meta-analysis of randomized controlled trials. Crit Rev Food Sci Nutr 2022;62(21):5

Effectiveness ratings and the research summaries above are the verbatim record from the Natural Medicines database, which grades evidence from “Effective” down to “Insufficient Reliable Evidence To Rate”. A rating below the top of that scale means researchers have looked at it — not that it works, and never that it can stand in for a prescribed medicine. Do not stop or replace Colesevelam on your own; if you are taking Dill for the same health topic, tell your prescriber, especially if the medicine is being adjusted to a target.

From our Q&A

Questions About Dill or Colesevelam

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 Colesevelam, 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 Colesevelam

This page covers Dill only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Colesevelam 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.

From our pharmacist’s overview on the Colesevelam page

“Colesevelam (WelChol, Lodalis) lowers cholesterol by binding bile acids in your gut, and every one of the 17 supplements on this list can interfere with how oral medicines are absorbed in that same territory. I would treat this list with genuine care, and the place to start is activated charcoal, the only major-rated entry.”

Reviewed by 2 · Jul 18, 2026

Open the Colesevelam 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 Colesevelam, 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 Colesevelam 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

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

29 days ago today
Medication Colesevelam
Steady interest

#2,234 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 September 20, 2026. The Dill and Colesevelam 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 Colesevelam

What Is Colesevelam Used For?

Brand names: WelChol, Lodalis

Colesevelam is used alongside diet and exercise to reduce high LDL cholesterol (the "bad" cholesterol) in adults with primary hyperlipidemia (high cholesterol). It is also approved to lower LDL cholesterol in boys and girls aged 10–17 who have heterozygous familial hypercholesterolemia (HeFH) — an inherited condition that causes very high cholesterol — when diet and lifestyle changes alone haven't worked.

Colesevelam tablets and oral suspension (Welchol and colesevelam hydrochloride products) are also used to improve blood sugar control in adults with type 2 diabetes, as an add-on to diet and exercise. Colesevelam is not for type 1 diabetes or diabetic ketoacidosis.

Most-Reported Side Effects for Colesevelam

From FAERS, the FDA’s public side-effect reporting system (2,014 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Diarrhea 241 reports
Dyspnea 172 reports
Cough 169 reports
Muscle spasms 163 reports
Nasopharyngitis 150 reports
See full Colesevelam 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 Colesevelam, ranked by severity
Evidence & sources

Dill References

The 17 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. Kojuri, J., Vosoughi, A. R., and Akrami, M. Effects of anethum graveolens and garlic on lipid profile in hyperlipidemic patients. Lipids Health Dis. 2007;6:5. PubMed
  10. 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.
  11. 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.
  12. Hekmatzadeh SF, Bazarganipour F, Malekzadeh J, Goodarzi F, Aramesh S. A randomized clinical trial of the efficacy of applying a simple protocol of boiled Anethum Graveolens seeds on pain intensity and duration of labor stages. Complement Ther Med. 2014;22 PubMed
  13. Sohm B, Cenizo V, André V, Zahouani H, Pailler-Mattei C, Vogelgesang B. Evaluation of the efficacy of a dill extract in vitro and in vivo. Int J Cosmet Sci. 2011;33(2):157-63.
  14. Hekmatzadeh SF, Bazarganipour F, Allan H, Aramesh S, Mohammadi J. Effects of boiled dill seed on anxiety during labor: A randomized clinical trial. Chin J Integr Med. 2020;26(2):100-105. PubMed
  15. Omidvar S, Nasiri-Amiri F, Bakhtiari A, Begum K. Clinical trial for the management dysmenorrhea using selected spices. Complement Ther Clin Pract. 2019;36:34-38. 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 Dill and Colesevelam Together: Common Questions

Is it safe to take Dill with Colesevelam?
We do not list a known interaction between Dill and Colesevelam. 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 Dill and Colesevelam have any of the same side effects?
Yes — our sources link each of them separately to 2 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 Dill and Colesevelam at the same time of day?
At least one FDA label for a product containing Colesevelam says to take it with food. If you take Dill on an empty stomach out of habit, keep them separate and take Colesevelam with a meal where the label says to. Food instructions belong to the product rather than the ingredient — two Colesevelam products can differ — so check the directions on your own box. This is about absorption, not an interaction.
Are Dill and Colesevelam used for the same thing?
They overlap in purpose, which usually means the real question is whether you need both rather than whether they are safe together. This page lists the shared uses and how strong the evidence is for Dill in each. That is a conversation for your prescriber, especially if Colesevelam is being adjusted to a target.
How was the Dill and Colesevelam combination checked?
Interactions in our licensed database are recorded against drug classes. Colesevelam is filed under 1 classification, and Dill has documented interactions with 2 drug classes — none of Colesevelam'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 — Colesevelam 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 Colesevelam interact with any supplements?
Yes. Colesevelam has documented interactions with 17 supplements in our database — Dill is not one of them. The Colesevelam 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 Colesevelam drug information The full plain-English guide to this medication Colesevelam supplement interactions Every supplement checked against Colesevelam, 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 17 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Colesevelam and Dill?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

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.