Fiber 14g Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Fiber 14g 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
Fiber 14g is a dietary supplement by Trace Minerals Research with 8 active ingredients. Its ingredients are commonly taken for constipation, diarrhea, high cholesterol.Based on those ingredients, 2,074 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Dietary Fiber, Magnesium. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Fiber 14g by Trace Minerals Research
Ask about any prescription or over-the-counter medication and we check it for interactions with Fiber 14g by Trace Minerals Research — 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 Fiber 14g by Trace Minerals Research
Four independent checks of what is known — a summary of the available information, not a grade of the product itself.
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
The stated purpose hasn't been mapped to our evidence data yet.
Why this rating?
- We haven't mapped this product's purpose to our evidence data yet — it'll be graded on the next content refresh.
Every active ingredient lists its own amount on the label.
Why this rating?
- The label discloses an exact amount for 7 of its 7 active ingredients.
- No proprietary blends here — you can verify the dose of every single component.
At least one ingredient has a documented Major-severity interaction. Check your medications for a personalized result.
Why this rating?
- 2 of the 4 matched ingredients can interact with medications — Black Psyllium, Magnesium.
- The most serious interaction on file is rated Major.
- Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; diabetes medications; heart-rhythm medications; lithium; Parkinson's medications.
- For scale: 2,075 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.
Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.
Why this rating?
- We hold adverse-effect (side-effect) data for 4 of the 4 matched ingredients.
- Pregnancy & breastfeeding safety ratings cover 4 of 4.
- General safety write-ups exist for 4 of 4.
- Remember: this measures how much safety information exists. Thin data is not the same as being safe.
HelloPharmacist summaryFully disclosed formula with no assessable stated purpose. Major medication interactions have been identified, and safety information is well characterized.
Assessment coverage: 4 of 7 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jan 25, 2012.
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 Fiber 14g, straight from the product label.
| Brand | Trace Minerals Research |
|---|---|
| Market status | Off market |
| Date entered into DSLD | Jan 25, 2012 |
| DSLD ID | 4610 |
| Product type | Fiber And Other Nutrients |
| Supplement form | Liquid |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Vegan, Adult (18 - 50 Years), Organic, Gluten 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 Fiber 14g by Trace Minerals Research, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Calories | 60 {Calories} | -- |
| Total Carbohydrates | 15 g | 5% |
| Sugar | 1 g | -- |
| Dietary Fiber | 14 g | 56% |
| Magnesium | 35 mg | 9% |
| Soluble Fiber | 14 g | -- |
| Boron | 92 mcg | -- |
| Sulfate | 5 mg | -- |
| Chloride | 105 mg | 3% |
| ConcenTrace | 300 mg | -- |
Other ingredients: purified Water, inulin, organic Acacia, ionic trace minerals, white Grape concentrate, Apple juice concentrate, natural Orange flavors blend, Aloe vera, Apple Pectin, Potassium Benzoate, Potassium Sorbate
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.
FDA Statement of Identity
DIETARY SUPPLEMENT
Suggested/Recommended/Usage/Directions
Suggested Use: Shake well. Take straight or mix into juice or food. Begin regimen by taking 1 tbsp. daily for 1 week to allow GI tract to adjust. Then take 2 tbsp. daily if desired. An influx of digestive gases is normal and should be expected. Drink plenty of fluids while taking fiber. Refrigerate after opening.
FDA Disclaimer Statement
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
General Statements
A gluten-free source of dietary fiber and prebiotics to promote digestive health.
Benefits of prebiotics include: boost production of the beneficial cultures that naturally reside in the digestive tract to help aid digestion† beneficial cultures help support the natural, healthy bacterial balance of the intestines† increasing good gut flora and reducing occasional indigestion†
Diets high in fiber have also been shown to prevent occasional constipation, support good colon health, and promote and support cardiovascular health.
Fast-Absorbing
Feel the difference or Your Money Back!
Made in the U.S.A.
NO Grit • NO Gluten • NO Psyllium • NO Mixing
On average, Americans consume less than 50% of the dietary fiber levels required for good health. But with just one serving of Fiber 14g, you can get 56% of your daily intake of fiber! The fiber content in Fiber 14g comes from Inulin and Organic Acacia, which are naturally occurring soluble fibers derived from all-natural sources.
Orange Cream
Prebiotic Fibers As soluble fiber reaches the large intestine, the prebiotic fibers begin to ferment and yield short chain fatty acids, which affect the function of many regulatory systems in the body.†
Soluble fiber benefits include: Weight loss Natural appetite suppressant–NO added calories!† Absorb fat in the digestive tract to reduce the amount of fat absorbed by the body† Optimal digestive health and function†
Brand IP Statement(s)
(C)2011 Trace Minerals Research(R)
Also contains over 72 ionic trace minerals from ConcenTrace(R).
liquimins(TM)
To complete the formula, we supercharged Fiber 14g with over 72 ionic minerals from Concen- Trace(R) for greater absorption and assimilation.†
Formulation
Certified Vegan • Gluten Free
Precautions
Allergen Info: contains no known allergens. GLUTEN FREE.
Seals/Symbols
AMERICA'S #1 TRACE MINERAL BRAND
AVA(TM) Certified Vegan American Vegetarian Association
FEEL THE DIFFERENCE GUARANTEED OR YOUR MONEY BACK
super charged with CONCENTRACE(R) for better absorption
TRACE MINERALS RESEARCH(R)
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Fiber 14g by Trace Minerals Research 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 Fiber 14g by Trace Minerals Research
These are the 8 active ingredients this product is made of. Select any to open its full monograph.
Serving size0.5 Ounce(s) Dosage formLiquid Servings per container15 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.
Sugar
Dietary Fiber
Interacts with2,025 drugs
Black psyllium is a soluble-fiber supplement made from the seeds of a Plantago plant, used mostly to ease constipation and support digestive health. I...
Dietary Fiber monograph & interactionsMagnesium
Interacts with295 drugs
Magnesium is an essential mineral your body needs for muscles, nerves, blood pressure, and many other functions, and supplements are useful for preven...
Magnesium monograph & interactionsSoluble Fiber
Boron
No knowninteractions
Boron is a trace mineral found in many plant foods and sold as a supplement, mainly promoted for bone, joint, and hormone health. The human evidence f...
Boron monograph & interactionsSulfate
No knowninteractions
Sulfur is a mineral used mainly in topical skin products for acne, rosacea, dandruff, and certain skin infections, and has a long history in dermatolo...
Sulfate monograph & interactionsChloride
ConcenTrace
Other (inactive) ingredients: Purified Water, Inulin, Organic Acacia, Ionic trace minerals, White Grape concentrate, Apple juice concentrate, Natural Orange flavors blend, Aloe vera, Apple Pectin, Potassium Benzoate, Potassium Sorbate. These complete the product’s ingredient list but are not active constituents.
Fiber 14g by Trace Minerals Research Drug Interactions
Fiber 14g contains 8 ingredients, and 2 of them have known drug interactions. Altogether they interact with 2,074 medications. Here’s the picture, then you can look up your own drug.
Want to check YOUR meds against Fiber 14g?
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 Fiber 14g interact with 2,074 drugs. Click any drug to see the details.
2 of the 8 ingredients in Fiber 14g interact with drugs. Each result below shows which ingredient is responsible. Dietary Fiber Magnesium
CisatracuriumNimbex
How Cisatracurium interacts with Fiber 14g — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumSkeletal Muscle Relaxants Moderate
Interaction Summary
Parenteral magnesium alters the pharmacokinetics of skeletal muscle relaxants, increasing their effects and accelerating the onset of effect.
Read the full Magnesium + Cisatracurium interactionClinafloxacinClinafloxacin
How Clinafloxacin interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumQuinolone Antibiotics Moderate
Interaction Summary
Magnesium decreases absorption of quinolones.
Read the full Magnesium + Clinafloxacin interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Clinafloxacin interactionCobicistat, Elvitegravir, Emtricitabine, Tenofovir Alafenamide FumarateGenvoya
How Cobicistat, Elvitegravir, Emtricitabine, Tenofovir Alafenamide Fumarate interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Magnesium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Read the full Magnesium + Cobicistat, Elvitegravir, Emtricitabine, Tenofovir Alafenamide Fumarate interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Cobicistat, Elvitegravir, Emtricitabine, Tenofovir Alafenamide Fumarate interactionCyclobenzaprineCyclobenzaprine, Cycloprine, Flexeril
How Cyclobenzaprine interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumSkeletal Muscle Relaxants Moderate
Interaction Summary
Parenteral magnesium alters the pharmacokinetics of skeletal muscle relaxants, increasing their effects and accelerating the onset of effect.
Read the full Magnesium + Cyclobenzaprine interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Cyclobenzaprine interactionDantroleneDantrium, Dantrium Intravenous
How Dantrolene interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumSkeletal Muscle Relaxants Moderate
Interaction Summary
Parenteral magnesium alters the pharmacokinetics of skeletal muscle relaxants, increasing their effects and accelerating the onset of effect.
Read the full Magnesium + Dantrolene interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Dantrolene interactionDantrolene SodiumRyanodex
How Dantrolene Sodium interacts with Fiber 14g — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumSkeletal Muscle Relaxants Moderate
Interaction Summary
Parenteral magnesium alters the pharmacokinetics of skeletal muscle relaxants, increasing their effects and accelerating the onset of effect.
Read the full Magnesium + Dantrolene Sodium interactionDapagliflozin Propanediol, MetforminXigduo XR
How Dapagliflozin Propanediol, Metformin interacts with Fiber 14g — through 1 ingredient. Tap an ingredient for the detail:
Dietary FiberOral Drugs, Metformin (glucophage) Moderate
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Dapagliflozin Propanediol, Metformin interactionDapagliflozin, Metformin Hydrochloride, Saxagliptin HydrochlorideQternmet XR
How Dapagliflozin, Metformin Hydrochloride, Saxagliptin Hydrochloride interacts with Fiber 14g — through 1 ingredient. Tap an ingredient for the detail:
Dietary FiberOral Drugs, Metformin (glucophage) Moderate
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Dapagliflozin, Metformin Hydrochloride, Saxagliptin Hydrochloride interactionDarunavir, Cobicistat, Emtricitabine, Tenofovir AlafenamideSymtuza
How Darunavir, Cobicistat, Emtricitabine, Tenofovir Alafenamide interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Magnesium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Read the full Magnesium + Darunavir, Cobicistat, Emtricitabine, Tenofovir Alafenamide interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Darunavir, Cobicistat, Emtricitabine, Tenofovir Alafenamide interactionDemeclocyclineDeclomycin
How Demeclocycline interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumTetracycline Antibiotics Moderate
Interaction Summary
Magnesium decreases absorption of tetracyclines.
Read the full Magnesium + Demeclocycline interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Demeclocycline interactionDibasic Sodium Phosphate, Monobasic Potassium Phosphate, Monobasic Sodium Phosphate Monohydrate (prescription Drug)K-Phos Neutral
How Dibasic Sodium Phosphate, Monobasic Potassium Phosphate, Monobasic Sodium Phosphate Monohydrate (prescription Drug) interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumPotassium-sparing Diuretics Moderate
Interaction Summary
Potassium-sparing diuretics decrease excretion of magnesium, possibly increasing magnesium levels.
Read the full Magnesium + Dibasic Sodium Phosphate, Monobasic Potassium Phosphate, Monobasic Sodium Phosphate Monohydrate (prescription Drug) interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Dibasic Sodium Phosphate, Monobasic Potassium Phosphate, Monobasic Sodium Phosphate Monohydrate (prescription Drug) interactionDigoxinDigitek, Lanoxicaps, Lanoxin
How Digoxin interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumDigoxin Moderate
Interaction Summary
Magnesium salts may reduce absorption of digoxin.
Read the full Magnesium + Digoxin interactionDietary FiberOral Drugs, Digoxin (lanoxin) Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Digoxin interactionDihydroxyaluminum Sodium CarbonateRolaids
How Dihydroxyaluminum Sodium Carbonate interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumAntacids Moderate
Interaction Summary
Use of acid reducers may reduce the laxative effect of magnesium oxide.
Read the full Magnesium + Dihydroxyaluminum Sodium Carbonate interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Dihydroxyaluminum Sodium Carbonate interactionDiltiazemAdizem-SR, Adizem-XL, Angitil SR, Angitil XL, Calcicard CR, Cardizem +23 more
How Diltiazem interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumCalcium Channel Blockers Moderate
Interaction Summary
Magnesium can have additive effects with calcium channel blockers, although evidence is conflicting.
Read the full Magnesium + Diltiazem interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Diltiazem interactionDiltiazem, EnalaprilTeczem
How Diltiazem, Enalapril interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumCalcium Channel Blockers Moderate
Interaction Summary
Magnesium can have additive effects with calcium channel blockers, although evidence is conflicting.
Read the full Magnesium + Diltiazem, Enalapril interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Diltiazem, Enalapril interactionDolutegravir, Emtricitabine, Tenofovir AlafenamideDolutegravir, Emtricitabine, Tenofovir Alafenamide
How Dolutegravir, Emtricitabine, Tenofovir Alafenamide interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Magnesium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Read the full Magnesium + Dolutegravir, Emtricitabine, Tenofovir Alafenamide interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Dolutegravir, Emtricitabine, Tenofovir Alafenamide interactionDoripenemDoribax
How Doripenem interacts with Fiber 14g — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumQuinolone Antibiotics, Tetracycline Antibiotics +1 Moderate
Interaction Summary
Magnesium decreases absorption of quinolones.
Read the full Magnesium + Doripenem interactionDoxacuriumNuromax
How Doxacurium interacts with Fiber 14g — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumSkeletal Muscle Relaxants Moderate
Interaction Summary
Parenteral magnesium alters the pharmacokinetics of skeletal muscle relaxants, increasing their effects and accelerating the onset of effect.
Read the full Magnesium + Doxacurium interactionDoxycyclineDoryx, Doxy, Doxy-D, Doxycin, Doxycycline Injection, Doxylin +6 more
How Doxycycline interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumTetracycline Antibiotics Moderate
Interaction Summary
Magnesium decreases absorption of tetracyclines.
Read the full Magnesium + Doxycycline interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Doxycycline interactionDoxycycline HyclateActiclate, Acticlate Cap, Lymepak
How Doxycycline Hyclate interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumTetracycline Antibiotics Moderate
Interaction Summary
Magnesium decreases absorption of tetracyclines.
Read the full Magnesium + Doxycycline Hyclate interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Doxycycline Hyclate interactionDoxycycline MonohydrateErfacea
How Doxycycline Monohydrate interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumTetracycline Antibiotics Moderate
Interaction Summary
Magnesium decreases absorption of tetracyclines.
Read the full Magnesium + Doxycycline Monohydrate interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Doxycycline Monohydrate interactionDoxycylineDoxychel
How Doxycyline interacts with Fiber 14g — through 1 ingredient. Tap an ingredient for the detail:
MagnesiumTetracycline Antibiotics Moderate
Interaction Summary
Magnesium decreases absorption of tetracyclines.
Read the full Magnesium + Doxycyline interactionDrospirenoneDrospirenone
How Drospirenone interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumPotassium-sparing Diuretics Moderate
Interaction Summary
Potassium-sparing diuretics decrease excretion of magnesium, possibly increasing magnesium levels.
Read the full Magnesium + Drospirenone interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Drospirenone interactionDrospirenone, EstetrolNextstellis
How Drospirenone, Estetrol interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumPotassium-sparing Diuretics Moderate
Interaction Summary
Potassium-sparing diuretics decrease excretion of magnesium, possibly increasing magnesium levels.
Read the full Magnesium + Drospirenone, Estetrol interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Drospirenone, Estetrol interactionDrospirenone, Ethinyl EstradiolAngeliq, Gianvi, Yasmin
How Drospirenone, Ethinyl Estradiol interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumPotassium-sparing Diuretics Moderate
Interaction Summary
Potassium-sparing diuretics decrease excretion of magnesium, possibly increasing magnesium levels.
Read the full Magnesium + Drospirenone, Ethinyl Estradiol interactionDietary FiberOral Drugs, Ethinyl Estradiol Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Drospirenone, Ethinyl Estradiol interactionElvitegravir, Cobicistat, Emtricitabine, Tenofovir Disoproxil FumarateStribild
How Elvitegravir, Cobicistat, Emtricitabine, Tenofovir Disoproxil Fumarate interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Magnesium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Read the full Magnesium + Elvitegravir, Cobicistat, Emtricitabine, Tenofovir Disoproxil Fumarate interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Elvitegravir, Cobicistat, Emtricitabine, Tenofovir Disoproxil Fumarate interactionEmpagliflozin, Linagliptin, Metformin HydrochlorideTrijardy XR
How Empagliflozin, Linagliptin, Metformin Hydrochloride interacts with Fiber 14g — through 1 ingredient. Tap an ingredient for the detail:
Dietary FiberMetformin (glucophage), Oral Drugs Moderate
Interaction Summary
Theoretically, black psyllium might increase the therapeutic and adverse effects of metformin.
Read the full Dietary Fiber + Empagliflozin, Linagliptin, Metformin Hydrochloride interactionEmpagliflozin, MetforminSynjardy
How Empagliflozin, Metformin interacts with Fiber 14g — through 1 ingredient. Tap an ingredient for the detail:
Dietary FiberOral Drugs, Metformin (glucophage) Moderate
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Empagliflozin, Metformin interactionEmpagliflozin, Metformin HydrochlorideSynjardy XR
How Empagliflozin, Metformin Hydrochloride interacts with Fiber 14g — through 1 ingredient. Tap an ingredient for the detail:
Dietary FiberMetformin (glucophage), Oral Drugs Moderate
Interaction Summary
Theoretically, black psyllium might increase the therapeutic and adverse effects of metformin.
Read the full Dietary Fiber + Empagliflozin, Metformin Hydrochloride interactionEmtricitabineEmtriva
How Emtricitabine interacts with Fiber 14g — through 2 ingredients. Tap an ingredient for the detail:
MagnesiumBictegravir/emtricitabine/tenofovir Alafenamide (biktarvy) Moderate
Interaction Summary
Magnesium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Read the full Magnesium + Emtricitabine interactionDietary FiberOral Drugs Minor
Interaction Summary
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Read the full Dietary Fiber + Emtricitabine interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Fiber 14g 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.
Dietary Fiber
Carbamazepine (Tegretol)
Theoretically, black psyllium might reduce the effects of carbamazepine and increase the risk for convulsions.
Theoretically, black psyllium might reduce carbamazepine absorption. A preliminary study using blond psyllium reported decreased carbamazepine bioavailability due to binding of the drug to psyllium, as well as reduction of available fluid in the gut for dissolution of the drug. This interaction may also occur with black psyllium.
Lithium
Theoretically, taking black psyllium at the same time as lithium might reduce lithium absorption.
The fiber in black psyllium might reduce lithium absorption and plasma levels. Some case reports describe a reduction in plasma lithium levels with concomitant administration of blond psyllium. This was reversed when psyllium was stopped. This interaction may also occur with black psyllium.
Metformin (Glucophage)
Theoretically, black psyllium might increase the therapeutic and adverse effects of metformin.
Animal research shows that concurrent consumption of blond psyllium with metformin slows and increases the absorption of metformin. This interaction may also occur with black psyllium. To avoid changes in absorption, take psyllium 30-60 minutes after metformin.
Olanzapine (Zyprexa)
Theoretically, taking black psyllium at the same time as olanzapine might reduce olanzapine absorption.
The fiber in black psyllium might decrease the absorption of olanzapine. A single case report describes a reduction in the effectiveness of olanzapine when it was concomitantly administered with an unspecified type of psyllium 3 grams orally twice daily. This effect was reversed when psyllium was stopped.
Digoxin (Lanoxin)
Theoretically, taking black psyllium at the same time as digoxin might reduce digoxin absorption and decrease digoxin levels.
Psyllium might bind digoxin in the gut. However, some clinical evidence suggests that psyllium does not impact digoxin absorption.
Ethinyl Estradiol
Theoretically, taking black psyllium at the same time as ethinyl estradiol might alter levels of estradiol.
Concurrent use of blond psyllium with ethinyl estradiol results in a slight increase in the extent of ethinyl estradiol absorption and a slower rate of absorption. This is unlikely to be clinically significant.
Oral Drugs
Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.
Psyllium seems to have variable effects on drug absorption. To avoid changes in absorption, take psyllium 30-60 minutes after oral medications. Animal research shows that blond psyllium delays and increases the absorption of metformin and ethinyl estradiol. Case reports and animal research suggest that blond psyllium might reduce absorption of lithium, digoxin, olanzapine, and carbamazepine. Finally, some pharmacokinetic studies show that psyllium does not affect the absorption of levothyroxine or warfarin. Although many of these studies evaluated blond psyllium, the fiber content in black psyllium may have similar effects.
Magnesium
Levodopa/Carbidopa (Sinemet)
Magnesium can reduce the bioavailability of levodopa/carbidopa.
Clinical research in healthy volunteers shows that taking magnesium oxide 1000 mg with levodopa 100 mg/carbidopa 10 mg reduces the area under the curve (AUC) of levodopa by 35% and of carbidopa by 81%. In vitro and animal research shows that magnesium produces an alkaline environment in the digestive tract, which might lead to degradation and reduced bioavailability of levodopa/carbidopa.
Aminoglycoside Antibiotics
Concomitant use of aminoglycoside antibiotics and magnesium can increase the risk for neuromuscular weakness.
Both aminoglycosides and magnesium reduce presynaptic acetylcholine release, which can lead to neuromuscular blockade and possible paralysis. This is most likely to occur with high doses of magnesium given intravenously.
Antacids
Use of acid reducers may reduce the laxative effect of magnesium oxide.
A retrospective analysis shows that, in the presence of H2 receptor antagonists (H2RAs) or proton pump inhibitors (PPIs), a higher dose of magnesium oxide is needed for a laxative effect. This may also occur with antacids. Under acidic conditions, magnesium oxide is converted to magnesium chloride and then to magnesium bicarbonate, which has an osmotic laxative effect. By reducing acidity, antacids may reduce the conversion of magnesium oxide to the active bicarbonate salt.
Bictegravir/Emtricitabine/Tenofovir Alafenamide (Biktarvy)
Magnesium might decrease levels of bictegravir/emtricitabine/tenofovir alafenamide by reducing its absorption.
Advise patients that bictegravir/emtricitabine/tenofovir alafenamide should be taken at least 2 hours before or 6 hours after magnesium containing products.
Bisphosphonates
Magnesium can decrease absorption of bisphosphonates.
Cations, including magnesium, can decrease bisphosphonate absorption. Advise patients to separate doses of magnesium and these drugs by at least 2 hours.
Calcium Channel Blockers
Magnesium can have additive effects with calcium channel blockers, although evidence is conflicting.
Magnesium inhibits calcium entry into smooth muscle cells and may therefore have additive effects with calcium channel blockers. Severe hypotension and neuromuscular blockades may occur when nifedipine is used with intravenous magnesium, although some contradictory evidence suggests that concurrent use of magnesium with nifedipine does not increase the risk of neuromuscular weakness. High doses of magnesium could theoretically have additive effects with other calcium channel blockers.
Digoxin
Magnesium salts may reduce absorption of digoxin.
Clinical evidence suggests that treatment with oral magnesium hydroxide or magnesium trisilicate reduces absorption of digoxin from the intestines. This may reduce the blood levels of digoxin and decrease its therapeutic effects.
Potassium-Sparing Diuretics
Potassium-sparing diuretics decrease excretion of magnesium, possibly increasing magnesium levels.
Potassium-sparing diuretics also have magnesium-sparing properties, which can counteract the magnesium losses associated with loop and thiazide diuretics. Theoretically, increased magnesium levels could result from concomitant use of potassium-sparing diuretics and magnesium supplements.
Quinolone Antibiotics
Magnesium decreases absorption of quinolones.
Magnesium can form insoluble complexes with quinolones and decrease their absorption. Advise patients to take these drugs at least 2 hours before, or 4 to 6 hours after, magnesium supplements.
Skeletal Muscle Relaxants
Parenteral magnesium alters the pharmacokinetics of skeletal muscle relaxants, increasing their effects and accelerating the onset of effect.
Parenteral magnesium shortens the time to onset of skeletal muscle relaxants by about 1 minute and prolongs the duration of action by about 2 minutes. Magnesium potentiates the effects of skeletal muscle relaxants by decreasing calcium-mediated release of acetylcholine from presynaptic nerve terminals, reducing postsynaptic sensitivity to acetylcholine, and having a direct effect on the membrane potential of myocytes. Magnesium also has vasodilatory actions and increases cardiac output, allowing a greater amount of muscle relaxant to reach the motor end plate. A clinical study found that low-dose rocuronium (0.45 mg/kg), when given after administration of magnesium 30 mg/kg over 10 minutes, has an accelerated onset of effect, which matches the onset of effect seen with a full-dose rocuronium regimen (0.6 mg/kg). In another clinical study, onset times for rocuronium doses of 0.3, 0.6, and 1.2 mg/kg were 86, 76, and 50 seconds, respectively, when given alone, but were reduced to 66, 44, and 38 seconds, respectively, when the doses were given after a 15-minute infusion of magnesium sulfate 60 mg/kg. Giving intraoperative intravenous magnesium sulfate, 50 mg/kg loading dose followed by 15 mg/kg/hour, reduces the onset time of rocuronium, enhances its clinical effects, reduces the dose of intraoperative opiates, and prolongs the spontaneous recovery time. It does not affect the activity of subsequently administered neostigmine.
Sulfonylureas
Magnesium increases the systemic absorption of sulfonylureas, increasing their effects and side effects.
Clinical research shows that administration of magnesium hydroxide with glyburide increases glyburide absorption, increases maximal insulin response by 35-fold, and increases the risk of hypoglycemia, when compared with glyburide alone. A similar interaction occurs between magnesium hydroxide and glipizide. The mechanism of this effect appears to be related to the elevation of gastrointestinal pH by magnesium-based antacids, increasing solubility and enhancing absorption of sulfonylureas.
Tetracycline Antibiotics
Magnesium decreases absorption of tetracyclines.
Magnesium can form insoluble complexes with tetracyclines in the gut and decrease their absorption and antibacterial activity. Advise patients to take these drugs 1 hour before or 2 hours after magnesium supplements.
Anticoagulant/Antiplatelet Drugs
Theoretically, magnesium may have antiplatelet effects, but the evidence is conflicting.
In vitro evidence shows that magnesium sulfate inhibits platelet aggregation, even at low concentrations. Some preliminary clinical evidence shows that infusion of magnesium sulfate increases bleeding time by 48% and reduces platelet activity. However, other clinical research shows that magnesium does not affect platelet aggregation, although inhibition of platelet-dependent thrombosis can occur.
Gabapentin (Neurontin)
Gabapentin absorption can be decreased by magnesium.
Clinical research shows that giving magnesium oxide orally along with gabapentin decreases the maximum plasma concentration of gabapentin by 33%, time to maximum concentration by 36%, and area under the curve by 43%. Advise patients to take gabapentin at least 2 hours before, or 4 to 6 hours after, magnesium supplements.
Sevelamer (Renagel, Renvela)
Sevelamer may increase serum magnesium levels.
In patients on hemodialysis, sevelamer use was associated with a 0.28 mg/dL increase in serum magnesium. The mechanism of this interaction remains unclear.
Brand information
Manufacturer and brand details for Fiber 14g, from the product label.
Trace Minerals Research
See all Trace Minerals Research products- Name
- Trace Minerals Research(R)
- Street Address
- P.O. Box 429
- City
- Roy
- State
- Utah
- ZipCode
- 84067
- Phone Number
- 801-731-6051
- Web Address
- www.traceminerals.com
Fiber 14g by Trace Minerals Research: Common Questions
Does Fiber 14g by Trace Minerals Research interact with any medications?
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Where does this information come from?
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The Full Monographs Behind Fiber 14g’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Black Psyllium
Interacts with 2,025 drugsBlack psyllium is a soluble-fiber supplement made from the seeds of a Plantago plant, used mostly to ease constipation and support digestive health. It is best known and most studied for rel...
Read the full Black Psyllium monograph → Herb & supplement monographMagnesium
Interacts with 295 drugsMagnesium is an essential mineral your body needs for muscles, nerves, blood pressure, and many other functions, and supplements are useful for preventing or correcting deficiency. Some othe...
Read the full Magnesium monograph → Herb & supplement monographBoron
Boron is a trace mineral found in many plant foods and sold as a supplement, mainly promoted for bone, joint, and hormone health. The human evidence for most of these uses is limited or prel...
Read the full Boron monograph → Herb & supplement monographSulfur
Sulfur is a mineral used mainly in topical skin products for acne, rosacea, dandruff, and certain skin infections, and has a long history in dermatology. Topical sulfur is generally well tol...
Read the full Sulfur monograph →Sources & How We Checked
Fiber 14g'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 123 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.
Black Psyllium 18 references
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- Semen plantaginis in: WHO Monographs on Selected Medicinal Plants, volume 1. World Health Organization, Geneva, 1999. Available at http://apps.who.int/medicinedocs/en/d/Js2200e/. Accessed November 26, 1026.
- Code of Federal Regulations, Title 21 (21CFR 101.17). Food labeling warning, notice, and safe handling statements. Available at www.ecfr.gov/cgi-bin/text-idx?SID=20f647d3b74161501f46564b915b4048&mc=true&node=se21.2.101_117&rgn=div8. Accessed December 3, 2
- Code of Federal Regulations, Title 21 (21CFR 201.319). Specific labeling requirements - water-soluble gums, hydrophilic gums, and hydrophilic mucilloids. Available at www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?fr=201.319. Accessed Dece
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Magnesium 82 references
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- Covington TR, et al. Handbook of Nonprescription Drugs. 11th ed. Washington, DC: American Pharmaceutical Association, 1996.
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Boron 6 references
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Sulfur 17 references
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