Gelatin + Crofelemer
Crofelemer brand names: Fulyzaq, Mytesi.
We found no known interaction between Gelatin and Crofelemer 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.
Gelatin and Crofelemer
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 Crofelemer and Gelatin 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.
Worth understanding: our licensed dataset holds no drug-interaction record for Gelatin at all — not against Crofelemer, 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.
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.
Gelatin safety at a glance
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.
Gelatin in Pregnancy & Breastfeeding
When used orally in the amounts commonly found in foods.
When a specific type of gelatin from donkey hide, called colla corii asini, is used orally in doses of 10 grams daily for 6 weeks. Higher doses of 15 grams daily have been associated with an increased risk of inflammatory adverse effects, including sore throat, swollen gums, local eczema, and ulcers in the oral cavity. There is insufficient reliable information available about the safety of other types of gelatin when used during pregnancy in medicinal amounts.
When used orally in the amounts commonly found in foods. There is insufficient reliable information available about the safety of using larger amounts of gelatin during lactation; avoid using.
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
What Crofelemer Is Prescribed For, and What Gelatin Has Been Studied For
These two come up together because they touch the same health topic — not because they do the same job. Crofelemer is a prescription medicine with approved uses on its FDA label. Gelatin is a supplement: what follows is what researchers have looked at it for, and how strong that evidence is.
Crofelemer is prescribed for: Mytesi (crofelemer) is approved to provide symptomatic relief of non-infectious diarrhea in adult patients with HIV/AIDS who are taking antiretroviral therapy. It is not intended to treat diarrhea caused by an infection. Before starting Mytesi, a doctor will rule out infectious causes of diarrhea.
Gelatin has been studied for:
-
Diarrhea studied, not established Gelatin has been studied for this. Natural Medicines rates the evidence: Possibly Ineffective Read what the research shows
Gelatin for diarrhea
Oral gelatin tannate does not seem to be beneficial for diarrhea treatment in infants and young children.
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 Crofelemer on your own; if you are taking Gelatin for the same health topic, tell your prescriber, especially if the medicine is being adjusted to a target.
See Every Supplement That Interacts With Crofelemer
This page covers Gelatin only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Crofelemer 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.
Taking Gelatin as Part of a Dietary Supplement Product? Check It for Interactions
We hold 269 real supplement products containing Gelatin, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Gelatin. Even though Gelatin itself has no known interaction with Crofelemer, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:
Where Gelatin and Crofelemer 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.
#518 of 1,452 supplements looked up here in the last 7 days
#2,017 of 2,830 medications looked up here in the last 7 days
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 Gelatin reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Gelatin and Crofelemer 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.
About Gelatin
What is Gelatin?
- Joint and bone health
- Skin, hair, and nail support
- Source of dietary protein
- Digestive comfort
- Capsule shells for medicines and supplements
Gelatin is a protein made from animal collagen, used as a food, a capsule ingredient, and a supplement for joint, skin, and bone health. For most health uses, the evidence is limited or mixed, though it is generally safe as a food. If you have allergies, dietary restrictions, or a health condition, check with your pharmacist or doctor first.
Collagen derived from animal skin, bones, and connective tissue (usually pork or beef) · Powder, capsules, gummies, food products (Jell-O type desserts), and collagen/gelatin drinks
An interaction check asks whether these two react with each other — it does not ask whether Gelatin is a good idea for someone in your situation. Here is what our Gelatin record says about it on its own.
Gelatin: dosing
There is no official, standardized dose of gelatin for any health condition. The amount used in studies varies widely, and it is not clear what dose, if any, provides a health benefit.If you choose to use a gelatin supplement, follow the directions on the product label and do not exceed the recommended amount.
From our Gelatin monograph — the full record covers uses, side effects and every documented interaction.
About Crofelemer
What Is Crofelemer Used For?
Brand names: Fulyzaq, Mytesi
Mytesi (crofelemer) is approved to provide symptomatic relief of non-infectious diarrhea in adult patients with HIV/AIDS who are taking antiretroviral therapy.
It is not intended to treat diarrhea caused by an infection. Before starting Mytesi, a doctor will rule out infectious causes of diarrhea.
Most-Reported Side Effects for Crofelemer
From FAERS, the FDA’s public side-effect reporting system (233 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.
Other Drugs & Gelatin
Browse every other medication we’ve checked against Gelatin — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
No interaction 2,829 drugs checked — show the list
We also checked Gelatin against these medications and found no known interaction in our sources. Open any page to confirm.
- Apixaban ›
- Levothyroxine ›
- Amlodipine ›
- Warfarin ›
- Methylphenidate ›
- Sertraline ›
- Losartan Potassium ›
- Testosterone ›
- Ivermectin ›
- Metoprolol ›
- Abemaciclib ›
- Aspirin ›
- Acetaminophen ›
- Rosuvastatin ›
- Rivaroxaban ›
- Escitalopram ›
- Clopidogrel ›
- Atorvastatin ›
- Tadalafil ›
- Docusate ›
- Tirzepatide ›
- Ibuprofen ›
- Methamphetamine ›
- Hydroxyurea ›
- Warfarin Sodium ›
- Valacyclovir ›
- Sumatriptan ›
- Semaglutide ›
- Prednisone ›
- Lisdexamfetamine ›
- Propranolol ›
- Metformin ›
- Amitriptyline ›
- Lisinopril ›
- Amoxicillin ›
- Isotretinoin ›
- Methotrexate ›
- Amlodipine Besylate ›
- Bendamustine ›
- Bupropion ›
- Amphetamine ›
- Fluoxetine ›
- Doxycycline ›
- Acyclovir ›
- Azithromycin ›
- Lamotrigine ›
- Pregabalin ›
- Dextroamphetamine ›
- Gabapentin ›
- Acetaminophen, Codeine ›
- Quetiapine ›
- Clonazepam ›
- Levothyroxine, Liothyronine ›
- Naproxen ›
- Omeprazole ›
- Letrozole ›
- Methylene Blue ›
- Duloxetine ›
- Buspirone ›
- Citalopram ›
Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Gelatin list.
Gelatin References
The 11 references that drive our Gelatin 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.
- Lewis CJ. Letter to reiterate certain public health and safety concerns to firms manufacturing or importing dietary supplements that contain specific bovine tissues. FDA. Available at: www.cfsan.fda.gov/~dms/dspltr05.html.
- Schwick HG, Heide K. Immunochemistry and immunology of collagen and gelatin. Bibl Haematol 1969;33:111-25. PubMed
- Moskowitz RW. Role of collagen hydrolysate in bone and joint disease.Semin Arthritis Rheum 2000;30:87-99. PubMed
- Kelso JM. The gelatin story. J Allergy Clin Immunol 1999;103:200-2.
- Nakayama T, Aizawa C, Kuno-Sakai H. A clinical analysis of gelatin allergy and determination of its causal relationship to the previous administration of gelatin-containing acellular pertussis vaccine combined with diphtheria and tetanus toxoids. J Allerg PubMed
- Sakaguchi M, Inouye S. Anaphylaxis to gelatin-containing rectal suppositories. J Allergy Clin Immunol 2001;108:1033-4. PubMed
- PDR Electronic Library. Montvale, NJ: Medical Economics Company, Inc., 2001.
- de la Fuente Tornero E, Vega Castro A, de Sierra Hernández PÁ, et al. Kounis syndrome during anesthesia: Presentation of indolent systemic mastocytosis: A case report. A Case Rep. 2017;8(9):226-228. PubMed
- Ventura Spagnolo E, Calapai G, Minciullo PL, Mannucci C, Asmundo A, Gangemi S. Lethal anaphylactic reaction to intravenous gelatin in the course of surgery. Am J Ther. 2016;23(6):e1344-e1346. PubMed
- Li Y, He H, Yang L, Li X, Li D, Luo S. Therapeutic effect of Colla corii asini on improving anemia and hemoglobin compositions in pregnant women with thalassemia. Int J Hematol. 2016;104(5):559-565. PubMed
- Coury JR, Skaggs KF, Marciano GF, et al. Intraoperative Anaphylaxis to the Bovine Flowable Gelatin Matrix: A Report of 2 Cases. JBJS Case Connect 2022;12(1). 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.
Taking Gelatin and Crofelemer Together: Common Questions
Is it safe to take Gelatin with Crofelemer?
Do Gelatin and Crofelemer have any of the same side effects?
Are Gelatin and Crofelemer used for the same thing?
Does Crofelemer interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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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.