Drug & supplement interaction

Clay + Gabapentin

Gabapentin brand names: Neurontin, Gralise.

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 Clay and Gabapentin 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.

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

Clay and Gabapentin

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 Gabapentin and Clay 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.

Clay safety at a glance

Clay overall Use caution Topical use is generally low-risk, but oral clay can be contaminated with heavy metals.
Pregnancy Possibly Unsafe When used orally, long-term. Clay ingestion during pregnancy appears to be associated with an increased incidence of pre-eclampsia, hypertension, and/or edema.... Read the full pregnancy detail
Breastfeeding Avoid Not enough safety data; avoid taking clay by mouth while breastfeeding.

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 Gabapentin and Clay? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Gabapentin

Interactions in our licensed database are recorded against drug classes, not just single drug names. Gabapentin is filed under 4 classifications — including anticonvulsants, cns depressants, oral drugs. Clay has documented interactions with 2 drug classes — the most serious being cimetidine (tagamet) (moderate) and quinine (moderate) — and none of Gabapentin’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

Clay Does Interact With Other Medications

Clay has 3 moderate known drug interactions in our database — Gabapentin isn’t one of them. If you take anything else, check it against the full list below.

Moderate 3 No known interaction 2,827 (incl. Gabapentin)
Taking anything else?

Check Another of Your Medications Against Clay

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

What to actually watch for

No Interaction Found — But Data Suggests Clay and Gabapentin 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.

  • Severe muscle breakdown Worth acting on Additional detail

    Clay

    “Clay possesses potassium-binding capacity, and chronic clay ingestion has been associated with severe hypokalemia. A case report describes a 60-year-old female who habitually ingested clay (geophagia) and presented with severe hypokalemia, moderate hypophosphatemia, flaccid paralysis, muscle weakness, and rhabdomyolysis with a very high creatine kinase level.”

    Clay · Natural Medicines adverse-effect record, reported in hypokalemia.

    5 sources cited
    1. 26604. Gonzalez JJ, Owens W, Ungaro PC, et al. Clay ingestion: a rare cause of hypokalemia. Ann Intern Med 1982;97(1):65-6. PubMed
    2. 26605. Mengel CE, Carter WA, Horton ES. Geophagia with iron deficiency and hypokalemia. Cachexia Africana. Arch Intern Med 1964;114:470-4. PubMed
    3. 26606. Severance HW Jr, Holt T, Patrone NA, Chapman L. Profound muscle weakness and hypokalemia due to clay ingestion. South Med J 1988;81(2):272-4. PubMed
    4. 26623. Bennett A, Stryjewski G. Severe hypokalemia caused by oral and rectal administration of bentonite in a pediatric patient. Pediatr Emerg Care 2006;22(7):500-2. PubMed
    5. 107378. Schmidt C, Oxley Oxland J, Freercks R. A rare case of hypokalaemia and hypophosphataemia secondary to geophagia. BMJ Case Rep. 2021 May 12;14(5):e239322. PubMed

    Gabapentin

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

  • Reduced appetite / Constipation / Diarrhea / Vomiting reported in 5.0% of FDA reports for Gabapentin Additional detail

    Clay

    “Orally, clay seems to be well tolerated when used short-term. Adverse effects are generally mild and include constipation, vomiting, and diarrhea. Long-term ingestion of clay has been associated with more serious adverse effects.”

    Clay · Natural Medicines adverse-effect record, reported in anemia.

    6 sources cited
    1. 26617. Wang JS, Luo H, Billam M, et al. Short-term safety evaluation of processed calcium montmorillonite clay (NovaSil) in humans. Food Addit Contam 2005;22(3):270-9. PubMed
    2. 98648. Kee BK, Morris JS, Slack RS, et al. A phase II, randomized, double blind trial of calcium aluminosilicate clay versus placebo for the prevention of diarrhea in patients with metastatic colorectal cancer treated with irinotecan. Support Care Cancer. 2015;2 PubMed
    3. 98652. Lin JX, Fan ZY, Lin Q, et al. A comparison of dioctahedral smectite and iodine glycerin cream with topical mouth rinse in treatment of chemotherapy induced oral mucositis: a pilot study. Eur J Oncol Nurs. 2015;19(2):136-41. PubMed
    4. 98646. Pérez-Gaxiola G, Cuello-García CA, Florez ID, Pérez-Pico VM. Smectite for acute infectious diarrhoea in children. Cochrane Database Syst Rev. 2018;4:CD011526. PubMed
    5. 98649. Mitchell NJ, Kumi J, Aleser M, et al. Short-term safety and efficacy of calcium montmorillonite clay (UPSN) in children. Am J Trop Med Hyg. 2014;91(4):777-85. PubMed
    6. 101813. Lai BY, Liang N, Cao HJ, et al. Pediatric Tui Na for acute diarrhea in children under 5 years old: A systematic review and meta-analysis of randomized clinical trials. Complement Ther Med. 2018;41:10-22. PubMed

    “Orally, the most commonly reported adverse effects in clinical trials is constipation. Vomiting and diarrhea have been reported rarely. Long-term ingestion of clay may induce constipation, diarrhea, heartburn, flatulence, loss of appetite, and vomiting after meals. Clay ingestion has also been associated with intestinal obstruction and necrotizing enteritis, leading to bowel perforation.”

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

    6 sources cited
    1. 98646. Pérez-Gaxiola G, Cuello-García CA, Florez ID, Pérez-Pico VM. Smectite for acute infectious diarrhoea in children. Cochrane Database Syst Rev. 2018;4:CD011526. PubMed
    2. 101813. Lai BY, Liang N, Cao HJ, et al. Pediatric Tui Na for acute diarrhea in children under 5 years old: A systematic review and meta-analysis of randomized clinical trials. Complement Ther Med. 2018;41:10-22. PubMed
    3. 98649. Mitchell NJ, Kumi J, Aleser M, et al. Short-term safety and efficacy of calcium montmorillonite clay (UPSN) in children. Am J Trop Med Hyg. 2014;91(4):777-85. PubMed
    4. 26611. Carpenter WM. Observations on Cachexia Africana, on habits and effects of dirt eating in negro race. New Orleans Med Surg J 1844;1:146-68.
    5. 26616. Andrews PL, Horn CC. Signals for nausea and emesis: Implications for models of upper gastrointestinal diseases. Auton Neurosci 2006;125(1-2):100-15. PubMed
    6. 26617. Wang JS, Luo H, Billam M, et al. Short-term safety evaluation of processed calcium montmorillonite clay (NovaSil) in humans. Food Addit Contam 2005;22(3):270-9. PubMed

    Gabapentin

    Listed in the ADVERSE REACTIONS section of the FDA label for Gabapentin, and in voluntary FDA adverse-event reports. Read the label on DailyMed ›

  • Swelling Additional detail

    Clay

    “Cases of hypokalemia-induced muscle weakness and muscle swelling have been reported after ingestion of large quantities of clay.”

    Clay · Natural Medicines adverse-effect record, reported in hypokalemia.

    3 sources cited
    1. 26606. Severance HW Jr, Holt T, Patrone NA, Chapman L. Profound muscle weakness and hypokalemia due to clay ingestion. South Med J 1988;81(2):272-4. PubMed
    2. 26615. Ukaonu C, Hill DA, Christensen F. Hypokalemic myopathy in pregnancy caused by clay ingestion. Obstet Gynecol 2003;102(5 Pt 2):1169-71. DOI
    3. 26627. Trivedi TH, Daga GL, Yeolekar ME. Geophagia leading to hypokalemic quadriparesis in a postpartum patient. J Assoc Physicians India 2005;53:205-7.

    Gabapentin

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

Reported for Clay but not commonly for Gabapentin: a bowel blockage, a fast or pounding heartbeat, muscle weakness and low potassium.

Effects for Gabapentin come from the ADVERSE REACTIONS section of its FDA label; effects for Clay come from the Natural Medicines adverse-effect record, quoted above. Where a percentage is shown, it is the share of 361,481 voluntary FDA FAERS reports for Gabapentin 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

Clay in Pregnancy & Breastfeeding

Pregnancy Possibly Unsafe

When used orally, long-term. Clay ingestion during pregnancy appears to be associated with an increased incidence of pre-eclampsia, hypertension, and/or edema. There is insufficient reliable information available about the safety of ingesting clay short-term during 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 Clay or Gabapentin

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

This page covers Clay only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Gabapentin page lists 106 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: 1,4-butanediol (major), Activated Charcoal (major), Beer (major), Gamma-hydroxybutyrate (ghb) (major) and Kava (major).

By severity: 7 major · 82 moderate · 17 minor.

From our pharmacist’s overview on the Gabapentin page

“Gabapentin (Neurontin, Gralise) calms overactive nerves, which means it already slows your nervous system down, and that is exactly what 78 of the 106 supplements on this list also do. So the dominant risk here is sedation stacked on sedation, extra drowsiness at best and dangerously slowed breathing at worst, and with seven entries ra…”

Reviewed by 2 · Jul 18, 2026

Open the Gabapentin interaction page

One more smart check

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

We hold 17 real supplement products containing Clay, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Clay. Even though Clay itself has no known interaction with Gabapentin, 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 Clay and Gabapentin 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 Clay
Steady interest

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

29 days ago today
Medication Gabapentin
Top 5%

#42 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 Clay reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Clay and Gabapentin 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 Clay

What is Clay?

  • Detox and digestive complaints
  • Skin care (masks, acne, irritation)
  • Diarrhea and upset stomach
  • Drawing out toxins or impurities
  • Wound and rash poultices

Clay is a fine, mineral-rich earth (such as bentonite or kaolin) used on the skin and sometimes taken by mouth for digestive and 'detox' purposes. Topical use for masks and minor skin issues is popular and generally low-risk, but swallowing clay carries real safety concerns, including possible contamination with lead and other heavy metals. Talk to a pharmacist or doctor before taking clay internally.

Mineral-rich clay (bentonite, kaolin, French green clay, and similar) · Powder, capsules, masks, poultices, suspensions/drinks

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

Clay: dosing

There is no well-established, standardized dose for clay, and no recommended safe amount for eating it. Because of contamination and absorption concerns, taking clay internally is generally not recommended without medical guidance.If you use a topical product, follow the label directions for how long to leave a mask on and how often to use it. Choose products that are independently tested for heavy metals.

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

Read the full Clay monograph & all interactions
Medication

About Gabapentin

What Is Gabapentin Used For?

Brand names: Neurontin, Gralise

Gabapentin (brands include Neurontin, Relgaabi, Gabarone, Gralise, and Horizant) is primarily used to manage postherpetic neuralgia (PHN) — the nerve pain that lingers after a shingles outbreak — in adults. Neurontin, Relgaabi, Gabarone, and gabapentin capsules, tablets, and oral solution are also used as add-on therapy for partial onset seizures (a type of epilepsy) in adults and children aged 3 and older.

Horizant (gabapentin enacarbil extended-release tablet) has two specific approvals: treatment of moderate-to-severe primary restless legs syndrome (RLS) in adults, and management of postherpetic neuralgia in adults. Horizant is not recommended for people who need to sleep during the day and stay awake at night. Gralise is approved only for postherpetic neuralgia and cannot be substituted for other gabapentin products due to its different release profile.

Most-Reported Side Effects for Gabapentin

From FAERS, the FDA’s public side-effect reporting system (361,481 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Fatigue 24,972 reports
Nausea 22,728 reports
Diarrhea 18,114 reports
Headache 17,897 reports
Dizziness 16,238 reports
See full Gabapentin drug information
Keep checking

Other Drugs & Clay

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

0Major
3Moderate
0Minor
2,826No known interaction
3 Moderate 2,826 No interaction
Moderate

3 interactions

No interaction 2,826 drugs checked — show the list

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

Showing the 60 most looked-up of 2,826 medications checked with no known interaction — see the full Clay list.

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

Clay References

The 31 references that drive our Clay 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. Gonzalez JJ, Owens W, Ungaro PC, et al. Clay ingestion: a rare cause of hypokalemia. Ann Intern Med 1982;97(1):65-6. PubMed
  2. Mengel CE, Carter WA, Horton ES. Geophagia with iron deficiency and hypokalemia. Cachexia Africana. Arch Intern Med 1964;114:470-4. PubMed
  3. Severance HW Jr, Holt T, Patrone NA, Chapman L. Profound muscle weakness and hypokalemia due to clay ingestion. South Med J 1988;81(2):272-4. PubMed
  4. Minnich V, Okcuoglu A, Tarcon Y, et al. Pica in Turkey. II. Effect of clay upon iron absorption. Am J Clin Nutr 1968;21(1):78-86.
  5. O'Rourke DE, Quinn JG, Nicholson JO, Gibson HH. Geophagia during pregnancy. Obstet Gynecol 1967;29(4):581-4.
  6. Edwards CE, McDonald S, Mitchell JK, et al. Effect of clay and cornstarch intake on women and their infants. J Amer Diet Assoc 1964;44:109-15. DOI
  7. Carpenter WM. Observations on Cachexia Africana, on habits and effects of dirt eating in negro race. New Orleans Med Surg J 1844;1:146-68.
  8. Ducrotte P, Dapoigny M, Bonaz B, Siproudhis L. Symptomatic efficacy of beidellitic montmorillonite in irritable bowel syndrome: a randomized, controlled trial. Aliment Pharmacol Ther 2005;21(4):435-44. PubMed
  9. Chang FY, Lu CL, Chen CY, Luo JC. Efficacy of dioctahedral smectite in treating patients of diarrhea-predominant irritable bowel syndrome. J Gastroenterol Hepatol 2007;22(12):2266-72. PubMed
  10. Blum M, Orton C, Rose L. The effect of starch ingestion on excessive iron association, abstracted. Ann Intern Med 1968;68:1165.
  11. Ukaonu C, Hill DA, Christensen F. Hypokalemic myopathy in pregnancy caused by clay ingestion. Obstet Gynecol 2003;102(5 Pt 2):1169-71. DOI
  12. Andrews PL, Horn CC. Signals for nausea and emesis: Implications for models of upper gastrointestinal diseases. Auton Neurosci 2006;125(1-2):100-15. PubMed
  13. Wang JS, Luo H, Billam M, et al. Short-term safety evaluation of processed calcium montmorillonite clay (NovaSil) in humans. Food Addit Contam 2005;22(3):270-9. PubMed
  14. Bateson EM, Lebroy T. Clay eating by Aboriginals of the Northern Territory. Med J Aust 1978;1 Suppl 1:1-3. PubMed
  15. Delaitre B, Lemaigre G, Acar JF, et al. [Necrotizing enteritis and geophagia]. Nouv Presse Med 1976;5(28):1743-6.

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 Clay and Gabapentin Together: Common Questions

Is it safe to take Clay with Gabapentin?
We do not list a known interaction between Clay and Gabapentin. 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 Clay and Gabapentin have any of the same side effects?
Yes — our sources link each of them separately to 6 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 Clay and Gabapentin combination checked?
Interactions in our licensed database are recorded against drug classes. Gabapentin is filed under 4 classifications, and Clay has documented interactions with 2 drug classes — none of Gabapentin'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 Clay interact with any other medications?
Yes. Clay has 3 documented drug interactions in our database — Gabapentin 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 Gabapentin interact with any supplements?
Yes. Gabapentin has documented interactions with 106 supplements in our database — Clay is not one of them. The Gabapentin 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

Clay monograph Uses, safety profile, and every drug interaction in one place Gabapentin drug information The full plain-English guide to this medication Gabapentin supplement interactions Every supplement checked against Gabapentin, 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 31 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Gabapentin and Clay?

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.