Fibromin Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Fibromin against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.
Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy
Fibromin is a dietary supplement by Apex Energetics with 4 active ingredients. Its ingredients are commonly taken for constipation and bowel regularity, diarrhea (as a stool bulking agent), lowering cholesterol.Based on those ingredients, 2,136 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Guar Gum, Flaxseed bran, Pectin. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Fibromin by Apex Energetics
Ask about any prescription or over-the-counter medication and we check it for interactions with Fibromin by Apex Energetics — and tell you which ingredient is responsible.
AI summaries are generated from our interaction database for education only — always confirm with your pharmacist. How we use AI
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HelloPharmacist Scorecard of Fibromin by Apex Energetics
Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.
What’s inside
Full disclosure
Fibromin contains 4 active ingredients. Guar gum and pectin are both soluble fibers that work to support cholesterol and blood sugar levels.
Flaxseed bran is a fiber source with lignans—plant compounds with potential hormone-like effects. Cellulose gum is a fiber-based thickener.
The product also contains hypromellose and cellulose as inactive ingredients—standard capsule components.
Does it work?
Moderate evidence
The evidence for Fibromin's ingredients is mixed. Guar gum is possibly effective for high blood pressure, high cholesterol, irritable bowel syndrome, and constipation.
Pectin is possibly effective for high cholesterol, though the evidence for blood sugar control and radiation exposure is insufficient. Flaxseed bran is possibly effective for high cholesterol, diabetes, breast pain, high blood pressure, and constipation.
The strongest case across all three fiber ingredients is for cholesterol support.
How safe is it?
Well-documented data
Fibromin is generally well tolerated when taken with plenty of water. The most common side effects are digestive: bloating, gas, diarrhea, loose stools, abdominal cramping, and heartburn.
Start with a small dose and increase gradually to minimize these effects. Rare but serious risk: if taken without adequate fluid, guar gum can cause blockages in your esophagus or small intestine.
Pectin may cause allergic reactions in sensitive people, including anaphylaxis in rare cases. Flaxseed can significantly increase bowel movements and diarrhea risk, especially at doses above 45 grams per day.
Safety data on supplement doses during pregnancy and breastfeeding is limited; discuss with your doctor or pharmacist before use if you're pregnant, planning pregnancy, or nursing.
Meds to double-check
Moderate interaction found
Before taking Fibromin, check your medications against these drug types: oral medications generally (guar gum reduces their absorption), antibiotics like penicillin and tetracycline, diabetes medications, blood pressure medications, blood thinners or antiplatelet drugs, cholesterol-lowering drugs like lovastatin, heart medications like digoxin, and hormonal birth control. Moderate severity applies to most; digoxin has a minor interaction with guar gum alone.
The bottom line
Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.
Fibromin is designed to support cholesterol, blood sugar, and digestive health through soluble fibers. It's generally well tolerated but requires plenty of water and may cause digestive upset, especially at first.
The biggest caution: it can interfere with how your body absorbs many common medications. If you take any prescription drugs—especially antibiotics, diabetes medications, birth control, blood thinners, or heart medications—check with your pharmacist before starting.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 3 of 4 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Aug 22, 2025.
This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed
General information
Key facts about Fibromin, straight from the product label.
| Brand | Apex Energetics |
|---|---|
| Net contents | 90 Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Aug 22, 2025 |
| DSLD ID | 337473 |
| Product type | Botanical With Nutrients |
| Supplement form | Capsule |
| Dietary claims / uses | Nutrient, All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Gluten Free, Dairy Free |
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.
Supplement Facts
The label details for Fibromin by Apex Energetics, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Guar Gum | 530 mg | -- |
| Cellulose Gum | 50 mg | -- |
| Pectin | 110 mg | -- |
| Flaxseed bran | 110 mg | -- |
Other ingredients: Hypromellose, Cellulose
Tap any ingredient to jump to its full detail below.
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Brand IP Statement(s)
Apex Energetics Nutritional Complexes
Copyright 2022 Apex Energetics, Inc.
Formula
Fibromin (K-25) Fiber
Fibromin helps support the colon, sugar metabolism, and lipid metabolism with a spectrum of insoluble and soluble fibers. This formula's key ingredients are guar gum and high-quality, standardized flaxseed bran. Generally, dietary fibers, especially those that are water soluble, may affect the stomach's emptying, its rate of carbohydrate digestion, and its absorption. Insoluble fiber increases the bulk of stool, facilitating the transportation of waste outside of the body.
FDA Statement of Identity
Dietary Supplement
Formulation
Blood sugar already within the normal range. Gastrointestinal
Vegetarian capsule
Tested for Gluten Tested for Dairy
Apex Energetics industry-leading commitment to purity, performance, and quality professional products.
General Statements
Product info Support products
Suggested/Recommended/Usage/Directions
Suggested use: Take 1 capsule 2 times a day, or as directed by your healthcare professional.
Storage
Storage instructions: Store at room temperature away from direct sunlight. Keep this bottle tightly closed.
Precautions
Warning: Consult your healthcare professional before use if pregnant, nursing, taking medications, or for any use by minors.
Warning: Consult your healthcare professional before use if pregnant, nursing, taking medications, or for any use by minors. Keep out of reach of children.
Do not use if safety seal is broken or missing.
For nutritional use only.
Apex Energetics dietary supplements are intended only for nutritional use and health maintenance and should not replace or delay the use of any conventional medical treatement.
FDA Disclaimer Statement
This product us not intended to diagnose, treat, cure, or prevent any disease.
This statement has not been evaluated by the Food Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Fibromin by Apex Energetics label
The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.
Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.
View the full label (PDF)The Ingredients in Fibromin by Apex Energetics
These are the 4 active ingredients this product is made of. Select any to open its full monograph.
Serving size1 Vegetarian Capsule(s) Dosage formCapsule Servings per container90 Amounts shown are per serving.
Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.
Guar Gum
Interacts with2,025 drugs
Guar gum is a soluble, gel-forming fiber from the guar bean that may modestly help with cholesterol, blood sugar, and bowel regularity. It is generall...
Guar Gum monograph & interactionsCellulose Gum
Pectin
Interacts with23 drugs
Pectin is a natural soluble fiber found in fruits like apples and citrus, and it is widely used in foods and as a fiber supplement. It may modestly he...
Pectin monograph & interactionsFlaxseed bran
Interacts with597 drugs
Flaxseed is a nutritious food rich in fiber, omega-3 fats (ALA), and plant compounds called lignans. It is most reliably helpful for constipation and...
Flaxseed bran monograph & interactionsOther (inactive) ingredients: Hypromellose, Cellulose. These complete the product’s ingredient list but are not active constituents.
Fibromin by Apex Energetics Drug Interactions
HelloPharmacist Interaction Report
Fibromin by Apex Energetics contains ingredients with documented interactions affecting a broad range of medications.
Guar gum is the source of the most serious concerns: it can reduce how your body absorbs many oral drugs (Moderate severity), including antibiotics like penicillin and diabetes medications like metformin. It may also interfere with birth control pills and slow absorption of heart medications like digoxin, though the digoxin effect appears minor.
To minimize this, take Fibromin 30–60 minutes after any oral medications.
Read the full breakdown — every affected drug type, severity by severity
Flaxseed bran adds further considerations. It may have additive blood-pressure-lowering effects with high blood pressure medications, increase bleeding risk if you take blood thinners (anticoagulants) or antiplatelet drugs, raise low blood sugar (hypoglycemia) risk with diabetes medications, and theoretically interfere with hormonal birth control.
Pectin may reduce absorption of cholesterol-lowering drugs like lovastatin, tetracycline antibiotics, and heart medications like digoxin—all Moderate severity. We could not check Cellulose Gum for interactions.
Altogether, these interactions span 2,117 individual medications.
Run your exact medications through the search tool on this page before starting Fibromin.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Fibromin?
Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.
Go to the checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in Fibromin interact with 2,136 drugs. Click any drug to see the details.
3 of the 4 ingredients in Fibromin interact with drugs. Each result below shows which ingredient is responsible. Guar Gum Flaxseed bran Pectin
"phentolamineOraVerse, Rogitine, Ryzumvi
How "phentolamine interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + "phentolamine interaction6-mercaptopurinePurinethol
How 6-mercaptopurine interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + 6-mercaptopurine interactionAbacavirZiagen
How Abacavir interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Abacavir interactionAbacavir Sulfate, Dolutegravir, LamivudineTriumeq
How Abacavir Sulfate, Dolutegravir, Lamivudine interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Abacavir Sulfate, Dolutegravir, Lamivudine interactionAbacavir, LamivudineEpzicom
How Abacavir, Lamivudine interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Abacavir, Lamivudine interactionAbciximabReoPro
How Abciximab interacts with Fibromin — through 2 ingredients. Tap an ingredient for the detail:
Flaxseed BranAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, using flaxseed in combination with anticoagulant or antiplatelet drugs might have additive effects and increase the risk of bleeding.
Read the full Flaxseed Bran + Abciximab interactionGuar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Abciximab interactionAbemaciclibVerzenio
How Abemaciclib interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Abemaciclib interactionAbiraterone
How Abiraterone interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Abiraterone interactionAbiraterone AcetateYonsa, Zytiga
How Abiraterone Acetate interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Abiraterone Acetate interactionAbrocitinibCibinqo
How Abrocitinib interacts with Fibromin — through 2 ingredients. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Abrocitinib interactionFlaxseed BranAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, using flaxseed in combination with anticoagulant or antiplatelet drugs might have additive effects and increase the risk of bleeding.
Read the full Flaxseed Bran + Abrocitinib interactionAcalabrutinibCalquence
How Acalabrutinib interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acalabrutinib interactionAcamprosateCampral
How Acamprosate interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acamprosate interactionAcarboseGlucobay, Prandase, Precose
How Acarbose interacts with Fibromin — through 2 ingredients. Tap an ingredient for the detail:
Flaxseed BranAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, flaxseed might have additive effects when used with antidiabetes drugs and increase the risk for hypoglycemia.
Read the full Flaxseed Bran + Acarbose interactionGuar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acarbose interactionAcebutololRhotral, Sectral
How Acebutolol interacts with Fibromin — through 2 ingredients. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acebutolol interactionFlaxseed BranAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, flaxseed might have additive effects when used with antihypertensive drugs and increase the risk of hypotension.
Read the full Flaxseed Bran + Acebutolol interactionAcenocoumarolSintrom
How Acenocoumarol interacts with Fibromin — through 2 ingredients. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acenocoumarol interactionFlaxseed BranAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, using flaxseed in combination with anticoagulant or antiplatelet drugs might have additive effects and increase the risk of bleeding.
Read the full Flaxseed Bran + Acenocoumarol interactionAcepromazineAtravet
How Acepromazine interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acepromazine interactionAcetaminophenChildren's Tylenol, Children's Tylenol Meltaways, Tylenol, Tylenol Ex Strength
How Acetaminophen interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acetaminophen interactionAcetaminophen, AspirinGemnisyn
How Acetaminophen, Aspirin interacts with Fibromin — through 2 ingredients. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acetaminophen, Aspirin interactionFlaxseed BranAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, using flaxseed in combination with anticoagulant or antiplatelet drugs might have additive effects and increase the risk of bleeding.
Read the full Flaxseed Bran + Acetaminophen, Aspirin interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with Fibromin — through 2 ingredients. Tap an ingredient for the detail:
Flaxseed BranAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, using flaxseed in combination with anticoagulant or antiplatelet drugs might have additive effects and increase the risk of bleeding.
Read the full Flaxseed Bran + Acetaminophen, Aspirin, Caffeine interactionGuar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, Brompheniramine, PhenylpropanolamineDimetapp Cold and Flu
How Acetaminophen, Brompheniramine, Phenylpropanolamine interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acetaminophen, Brompheniramine, Phenylpropanolamine interactionAcetaminophen, ButalbitalAxocet, Bancap, Bucet, Butex Forte, Esgic CF, Orbivan CF +5 more
How Acetaminophen, Butalbital interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acetaminophen, Butalbital interactionAcetaminophen, Butalbital, CaffeineEsgic, Esgic Plus, Fiogesic, Fioricet, Repan, Tecnal +1 more
How Acetaminophen, Butalbital, Caffeine interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acetaminophen, Butalbital, Caffeine interactionAcetaminophen, Butalbital, Caffeine, CodeineEsgic with Codeine, Fioricet w/ Codeine
How Acetaminophen, Butalbital, Caffeine, Codeine interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acetaminophen, Butalbital, Caffeine, Codeine interactionAcetaminophen, Butalbital, CodeineBancap w/ Codeine
How Acetaminophen, Butalbital, Codeine interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acetaminophen, Butalbital, Codeine interactionAcetaminophen, Butalbital, Codeine PhosphatePhrenilin #3
How Acetaminophen, Butalbital, Codeine Phosphate interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acetaminophen, Butalbital, Codeine Phosphate interactionAcetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, PhenylephrineHycomine Compound
How Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interactionAcetaminophen, Caffeine, CodeineGesic C15, Gesic C30, Gesic C8, Lenoltec 1, Lenoltec 2, Lenoltec 3 +1 more
How Acetaminophen, Caffeine, Codeine interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acetaminophen, Caffeine, Codeine interactionAcetaminophen, Caffeine, Codeine, SalicylamideCodalan No.1, Codalan No.2, Codalan No.3
How Acetaminophen, Caffeine, Codeine, Salicylamide interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acetaminophen, Caffeine, Codeine, Salicylamide interactionAcetaminophen, Caffeine, DihydrocodeineDHC Plus, Panlor DC, Panlor SS
How Acetaminophen, Caffeine, Dihydrocodeine interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acetaminophen, Caffeine, Dihydrocodeine interactionAcetaminophen, Caffeine, IsomethepteneMigralam
How Acetaminophen, Caffeine, Isometheptene interacts with Fibromin — through 1 ingredient. Tap an ingredient for the detail:
Guar GumOral Drugs Moderate
Interaction Summary
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Read the full Guar Gum + Acetaminophen, Caffeine, Isometheptene interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Fibromin with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.
Guar Gum
Ethinyl Estradiol
Theoretically, guar gum might reduce the absorption of ethinyl estradiol, potentially decreasing its effectiveness.
Animal research shows that taking guar gum with ethinyl estradiol decreases ethinyl estradiol absorption. However, this effect has not been reported in humans.
Metformin (Glucophage)
Guar gum might reduce the absorption of metformin, potentially decreasing its effectiveness.
A small study in healthy volunteers shows that guar gum reduces the absorption rate of metformin.
Oral Drugs
Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.
Clinical research shows that guar gum reduces or slows absorption of medications such as penicillin and metformin. To avoid changes in absorption, take guar gum 30-60 minutes after oral medications.
Penicillin
Guar gum might reduce the absorption of penicillin, potentially decreasing its effectiveness.
A small clinical study in healthy volunteers shows that taking guar gum with penicillin results in decreased penicillin absorption and reduced penicillin levels.
Digoxin (Lanoxin)
Guar gum might slow digoxin absorption, but it does not seem to impact how much digoxin is absorbed overall.
Two small studies in healthy volunteers show no change in the overall extent of digoxin absorption, although early absorption was slowed, when taken with guar gum.
Flaxseed bran
Antibiotic Drugs
Theoretically, antibiotics might interfere with the metabolism of flaxseed constituents, which could potentially alter the effects of flaxseed.
Some potential benefits of flaxseed are thought to be due to its lignan content. Secoisolariciresinol diglucoside (SDG), a major lignan precursor, is found in high concentrations in flaxseed. SDG is converted by bacteria in the colon to the lignans enterolactone and enterodiol. Antibiotics alter the flora of the colon, which could theoretically alter the metabolism of flaxseed.
Anticoagulant/Antiplatelet Drugs
Theoretically, using flaxseed in combination with anticoagulant or antiplatelet drugs might have additive effects and increase the risk of bleeding.
Some clinical evidence suggests that the oil contained in flaxseed can decrease platelet aggregation.
Antidiabetes Drugs
Theoretically, flaxseed might have additive effects when used with antidiabetes drugs and increase the risk for hypoglycemia.
Some clinical research suggests that flaxseed can lower blood glucose levels.
Antihypertensive Drugs
Theoretically, flaxseed might have additive effects when used with antihypertensive drugs and increase the risk of hypotension.
Clinical research shows that daily flaxseed consumption, especially for longer than 12 weeks, modestly reduces blood pressure.
Estrogens
Theoretically, taking flaxseed might decrease the effects of estrogens.
Flaxseed contains lignans with mild estrogenic and possible antiestrogenic effects. The lignans seem to compete with circulating endogenous estrogen and might reduce estrogen binding to estrogen receptors, resulting in an anti-estrogen effect. It is unclear if this effect transfers to exogenously administered estrogens.
Pectin
Digoxin (Lanoxin)
Theoretically, pectin might reduce the absorption of digoxin, potentially decreasing its effectiveness.
A small clinical study shows that taking digoxin with a kaolin-pectin suspension reduces the absorption of digoxin by about 62%. It is unclear if these effects are due to pectin, kaolin, or the combination.
Lovastatin (Mevacor)
Theoretically, pectin might reduce the absorption of lovastatin, potentially decreasing its effectiveness.
Case reports suggest that concomitant use of pectin and lovastatin might reduce the cholesterol-lowering effect of lovastatin, possibly due to reduced intestinal absorption of lovastatin.
Tetracycline Antibiotics
Theoretically, pectin might reduce the absorption of tetracycline antibiotics, potentially decreasing their effectiveness.
A small clinical study shows that taking tetracycline with bismuth subsalicylate in a kaolin-pectin suspension reduces the absorption of tetracycline by about 34%. It is unclear if these effects are due to pectin, kaolin, bismuth subsalicylate, or the combination.
Brand information
Manufacturer and brand details for Fibromin, from the product label.
Fibromin by Apex Energetics: Common Questions
Does Fibromin by Apex Energetics interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Will Fibromin interfere with my medications?
What side effects should I expect?
Can I take Fibromin while pregnant or breastfeeding?
What is each ingredient supposed to do?
Can people with allergies take this safely?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Fibromin is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.
The Full Monographs Behind Fibromin’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Guar Gum
Interacts with 2,025 drugsGuar gum is a soluble, gel-forming fiber from the guar bean that may modestly help with cholesterol, blood sugar, and bowel regularity. It is generally safe in food amounts, but concentrated...
Read the full Guar Gum monograph → Herb & supplement monographPectin
Interacts with 23 drugsPectin is a natural soluble fiber found in fruits like apples and citrus, and it is widely used in foods and as a fiber supplement. It may modestly help with cholesterol, blood sugar, and di...
Read the full Pectin monograph → Herb & supplement monographFlaxseed
Interacts with 597 drugsFlaxseed is a nutritious food rich in fiber, omega-3 fats (ALA), and plant compounds called lignans. It is most reliably helpful for constipation and may modestly lower cholesterol, but evid...
Read the full Flaxseed monograph →Sources & How We Checked
Fibromin's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.
- NIH Dietary Supplement Label Database (DSLD) — The official product label on file for this supplement.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference behind the ingredient interaction data.
Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.
The 74 references behind this product’s interaction data
Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.
Guar Gum 26 references
- Gin H, Orgerie MB, Aubertin J. The influence of Guar gum on absorption of metformin from the gut in healthy volunteers. Horm Metab Res 1989;21:81-3.
- Huupponen R, Seppala P, Iisalo E. Effect of guar gum, a fibre preparation, on digoxin and penicillin absorption in man. Eur J Clin Pharmacol 1984;26:279-81. PubMed
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