Drug & supplement interaction

Colonic Irrigation + Levothyroxine

Levothyroxine brand names: Euthyrox, Levothroid, Unithroid, Synthroid, Levoxyl, and others.

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 Colonic Irrigation and Levothyroxine 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

Colonic Irrigation and Levothyroxine

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 Levothyroxine and Colonic Irrigation in our sources. This does not guarantee that the combination is completely free of risk — research on Colonic Irrigation alongside specific medications may be limited.

Worth understanding: our licensed dataset holds no drug-interaction record for Colonic Irrigation at all — not against Levothyroxine, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.

Colonic Irrigation is a treatment rather than something you take. Tell whoever provides it which medicines you use, and ask your prescriber whether it is appropriate for your health and treatment. 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.

Colonic Irrigation safety at a glance

Colonic Irrigation overall Use caution Generally not recommended; carries risks like cramping, dehydration, and rarely bowel injury.
Pregnancy Avoid Avoid during pregnancy because of risks of dehydration, electrolyte changes, and bowel stimulation.
Breastfeeding Use caution Limited safety information; dehydration and electrolyte loss could affect you—best to avoid or check with your doctor.

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

Still wondering about combining Levothyroxine and Colonic Irrigation? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

No Interaction Found — But Data Suggests Colonic Irrigation and Levothyroxine 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 having Colonic Irrigation while taking the medicine can make those effects more likely to turn up, and harder to pin on one or the other if they do.

  • Stomach pain / Diarrhea Additional detail

    Colonic Irrigation

    “The safety and associated side effects of colonic irrigation depend on the method and substances used. While rare, colonic irrigation with tap water has been associated with electrolyte imbalances, namely hyponatremia. The most common side effects are gastrointestinal.”

    Colonic Irrigation · Natural Medicines adverse-effect record, reported in diarrhea.

    6 sources cited
    1. 96868. Acosta RD, Cash BD. Clinical effects of colonic cleansing for general health promotion: a systematic review. Am J Gastroenterol. 2009;104(11):2830-6. PubMed
    2. 96872. Koch SM, Melenhorst J, van Gemert WG, Baeten CG. Prospective study of colonic irrigation for the treatment of defaecation disorders. Br J Surg. 2008;95(10):1273-9. PubMed
    3. 103272. van Weelden M, Edelenbos E, de Meij T. Persistent hiccups because of water intoxication by colonic irrigation with tap water. ACG Case Rep J. 2019;6(8):e00148.2. PubMed
    4. 96871. Pacilli M, Pallot D, Andrews A, et al. Use of Peristeen® transanal colonic irrigation for bowel management in children: a single-center experience. J Pediatr Surg. 2014;49(2):269-72. PubMed
    5. 96873. Passananti V, Wilton A, Preziosi G, Storrie JB, Emmanuel A. Long-term efficacy and safety of transanal irrigation in multiple sclerosis. Neurogastroenterol Motil. 2016;28(9):1349-55. PubMed
    6. 3026. Margolin KA, Green MR. Polymicrobial enteric septicemia from coffee enemas. West J Med 1984;140:460.

    “Pain on insertion of the catheter has been described. Rarely, leakage after irrigation, abdominal cramps, anal bleeding, and bloating have also occurred. Rectal perforation requiring surgery has occurred very rarely.

    At least 36 cases of amebiasis, with bloody diarrhea, occurred following colonic irrigation at a clinic in Western Colorado between 1978 and 1980. Ten patients required colectomy and 6 died.”

    Colonic Irrigation · Natural Medicines adverse-effect record, reported in constipation.

    6 sources cited
    1. 96871. Pacilli M, Pallot D, Andrews A, et al. Use of Peristeen® transanal colonic irrigation for bowel management in children: a single-center experience. J Pediatr Surg. 2014;49(2):269-72. PubMed
    2. 96872. Koch SM, Melenhorst J, van Gemert WG, Baeten CG. Prospective study of colonic irrigation for the treatment of defaecation disorders. Br J Surg. 2008;95(10):1273-9. PubMed
    3. 96873. Passananti V, Wilton A, Preziosi G, Storrie JB, Emmanuel A. Long-term efficacy and safety of transanal irrigation in multiple sclerosis. Neurogastroenterol Motil. 2016;28(9):1349-55. PubMed
    4. 96868. Acosta RD, Cash BD. Clinical effects of colonic cleansing for general health promotion: a systematic review. Am J Gastroenterol. 2009;104(11):2830-6. PubMed
    5. 103273. Lee AH, Kabashneh S, Tsouvalas CP, et al. Proctocolitis from coffee enema. ACG Case Rep J. 2020;7(1):e00292. PubMed
    6. 108619. Mehershahi S, Ghazanfar H, Ashraf S, Shaikh DH, Patel H. Colitis Induced by Colon-Cleansing Agent. Case Rep Gastroenterol 2021;15(2):621-625. PubMed

    Levothyroxine

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

Reported for Colonic Irrigation but not commonly for Levothyroxine: an electrolyte imbalance, constipation, low sodium and memory problems.

Effects for Levothyroxine come from the ADVERSE REACTIONS section of its FDA label; effects for Colonic Irrigation 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.

Overlapping uses

What Levothyroxine Is Prescribed For, and What Colonic Irrigation Has Been Studied For

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

Levothyroxine is prescribed for: Levothyroxine replaces or supplements the thyroid hormone your body isn't making enough of. It's used for hypothyroidism — an underactive thyroid — in adults, children, and even newborns, whether the cause is the thyroid gland itself, the pituitary gland, or the hypothalamus in the brain. It's also used alongside surgery and radioiodine treatment in people with certain types of thyroid cancer, to help suppress the hormone that can stimulate cancer growth. It is not meant for weight loss, treating benign thyroid nodules in people who have enough iodine, or for hypothyroidism during recovery from a temporary condition called subacute thyroiditis.

Colonic Irrigation has been studied for:

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

    Colonic Irrigation for constipation

    Preliminary clinical research in adults with constipation of various etiologies shows that using colonic irrigation with a pump (Biotrol Irrimatic pump, Braun) or irrigation bag eliminates straining associated with constipation in 30% of patients and improves straining in an additional 50% of patients. Colonic irrigation also improves overall quality of life and feelings of incomplete evacuation in these patients.

    2 sources cited
    1. 96872. Koch SM, Melenhorst J, van Gemert WG, Baeten CG. Prospective study of colonic irrigation for the treatment of defaecation disorders. Br J Surg. 2008;95(10):1273-9. PubMed
    2. 96870. Christensen P, Bazzocchi G, Coggrave M, et al. A randomized, controlled trial of transanal irrigation versus conservative bowel management in spinal cord-injured patients. Gastroenterology. 2006;131(3):738-47. PubMed

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 Levothyroxine on your own; if you are taking Colonic Irrigation for the same health topic, tell your prescriber, especially if the medicine is being adjusted to a target.

From our Q&A

Questions About Colonic Irrigation or Levothyroxine

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Colonic Irrigation or Levothyroxine, 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 Levothyroxine

This page covers Colonic Irrigation only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Levothyroxine page lists 50 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Tiratricol (major), Acetyl-l-carnitine (moderate), Alpha-lipoic Acid (moderate) and Ascophyllum Nodosum (moderate).

By severity: 2 major · 39 moderate · 9 minor.

From our pharmacist’s overview on the Levothyroxine page

“Levothyroxine replaces a hormone your body measures in tiny amounts, so small shifts in its blood level show up in how you feel, and I treat this list with genuine care. Nearly everything on it does one of two things: blocks the pill from being absorbed in the gut, the way everyday minerals like calcium do by binding it into complexes,…”

Reviewed by 2 · Jul 18, 2026

Open the Levothyroxine interaction page

How much people look this up

Where Colonic Irrigation and Levothyroxine 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 Colonic Irrigation
Steady interest

#1,442 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Levothyroxine
Top 10

#2 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 Colonic Irrigation reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Colonic Irrigation and Levothyroxine 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 .
Treatment approach

About Colonic Irrigation

What is Colonic Irrigation?

  • Colon "cleansing" or "detox"
  • Constipation relief
  • Bloating and digestive discomfort
  • Bowel prep before procedures (enemas)
  • General wellness or "flushing toxins"

Colonic irrigation (colon hydrotherapy) flushes the large intestine with water, often marketed for "detox" and digestive health, but there is little good evidence it provides real health benefits. It can cause uncomfortable and occasionally serious side effects, so it is not recommended for routine use—talk to your doctor or pharmacist before trying it.

Not applicable — this is a procedure, not a plant or supplement · In-clinic colon hydrotherapy session; at-home enema kits

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

Colonic Irrigation: dosing

There is no established safe or recommended "dose" or schedule for colonic irrigation, and it is not a supplement you take by mouth. Sessions vary widely in how much water is used and how long they last.Because of the lack of proven benefit and the potential for harm, most pharmacists and doctors do not recommend routine colonics. If you are considering one, talk with a healthcare professional first, and only use a properly licensed practitioner with sterile, single-use equipment.For medically necessary bowel preparation (such as before a colonoscopy), follow the specific instructions and products your doctor prescribes—this is different from a wellness colonic.

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

Read the full Colonic Irrigation monograph & all interactions
Medication

About Levothyroxine

What Is Levothyroxine Used For?

Brand names: Euthyrox, Levothroid, Unithroid, Synthroid, Levoxyl, Levo-T, Eltroxin, Estre, Levothyroxine, Novothyrox, Levolet

Levothyroxine replaces or supplements the thyroid hormone your body isn't making enough of. It's used for hypothyroidism — an underactive thyroid — in adults, children, and even newborns, whether the cause is the thyroid gland itself, the pituitary gland, or the hypothalamus in the brain.

It's also used alongside surgery and radioiodine treatment in people with certain types of thyroid cancer, to help suppress the hormone that can stimulate cancer growth. It is not meant for weight loss, treating benign thyroid nodules in people who have enough iodine, or for hypothyroidism during recovery from a temporary condition called subacute thyroiditis.

See full Levothyroxine drug information
Keep checking

Other Drugs & Colonic Irrigation

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

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

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

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Colonic Irrigation list.

See the full Colonic Irrigation interactions page
See every supplement checked against Levothyroxine, ranked by severity
Evidence & sources

Colonic Irrigation References

The 17 references that drive our Colonic Irrigation 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. Margolin KA, Green MR. Polymicrobial enteric septicemia from coffee enemas. West J Med 1984;140:460.
  2. Green S. A critique of the rationale for cancer treatment with coffee enemas and diet. JAMA 1992;268:3224-7. DOI
  3. Shils ME, Herman MG. Unproved dietary claims in the treatment of patients with cancer. Bull N Y Acad Med 1982;58:323-39.
  4. Brown BT. Treating cancer with coffee enemas and diet. JAMA 1993;269:1635-6. DOI
  5. Church JM. Warm water irrigation for dealing with spasm during colonoscopy: simple, inexpensive, and effective. Gastrointest Endosc 2002;56(5):672-4. PubMed
  6. Sha LJ, Zhang ZX, Cheng LX. Colonic dialysis therapy of Chinese herbal medicine in abstinance of heroin addicts--report of 75 cases. Zhongguo Zhong Xi Yi Jie He Za Zhi 1997;17(2):76-8.
  7. Briel JW, Schouten WR, Vlot EA, et al. Clinical value of colonic irrigation in patients with continence disturbances. Dis Colon Rectum 1997;40(7):802-5. PubMed
  8. Acosta RD, Cash BD. Clinical effects of colonic cleansing for general health promotion: a systematic review. Am J Gastroenterol. 2009;104(11):2830-6. PubMed
  9. Hsu HH, Leung WH, Hu GC. Treatment of irritable bowel syndrome with a novel colonic irrigation system: a pilot study. Tech Coloproctol. 2016;20(8):551-7. PubMed
  10. Christensen P, Bazzocchi G, Coggrave M, et al. A randomized, controlled trial of transanal irrigation versus conservative bowel management in spinal cord-injured patients. Gastroenterology. 2006;131(3):738-47. PubMed
  11. Pacilli M, Pallot D, Andrews A, et al. Use of Peristeen® transanal colonic irrigation for bowel management in children: a single-center experience. J Pediatr Surg. 2014;49(2):269-72. PubMed
  12. Koch SM, Melenhorst J, van Gemert WG, Baeten CG. Prospective study of colonic irrigation for the treatment of defaecation disorders. Br J Surg. 2008;95(10):1273-9. PubMed
  13. Passananti V, Wilton A, Preziosi G, Storrie JB, Emmanuel A. Long-term efficacy and safety of transanal irrigation in multiple sclerosis. Neurogastroenterol Motil. 2016;28(9):1349-55. PubMed
  14. van Weelden M, Edelenbos E, de Meij T. Persistent hiccups because of water intoxication by colonic irrigation with tap water. ACG Case Rep J. 2019;6(8):e00148.2. PubMed
  15. Lee AH, Kabashneh S, Tsouvalas CP, et al. Proctocolitis from coffee enema. ACG Case Rep J. 2020;7(1):e00292. 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

Having Colonic Irrigation While Taking Levothyroxine: Common Questions

Is it safe to have Colonic Irrigation while taking Levothyroxine?
We do not list a known interaction between Colonic Irrigation and Levothyroxine. 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 Colonic Irrigation and Levothyroxine 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.
Are Colonic Irrigation and Levothyroxine 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 Colonic Irrigation in each. That is a conversation for your prescriber, especially if Levothyroxine is being adjusted to a target.
Does Levothyroxine interact with any supplements?
Yes. Levothyroxine has documented interactions with 50 supplements in our database — Colonic Irrigation is not one of them. The Levothyroxine 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

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

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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.