Rephyll Powder Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Rephyll Powder 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
Rephyll Powder is a dietary supplement by Nootropics Depot with 1 active ingredient. Its ingredients are commonly taken for flavoring and culinary use, digestive complaints like bloating and indigestion, boosting absorption of other supplements.Based on those ingredients, 1,019 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Rephyll (Piper nigrum) extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Rephyll Powder by Nootropics Depot
Ask about any prescription or over-the-counter medication and we check it for interactions with Rephyll Powder by Nootropics Depot — 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 Rephyll Powder by Nootropics Depot
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
Rephyll Powder is a single-ingredient supplement: black pepper extract (from Piper nigrum). The product also contains inactive ingredients — modified food starch, sunflower lecithin, and turmeric extract — which are fillers and binders used to make the powder.
Does it work?
Couldn't assess
The evidence for black pepper extract isn't established for the uses listed in the data we hold — allergic rhinitis (hay fever), asthma, athletic performance, headache, depression, and diarrhea all show insufficient reliable evidence to rate. That means the research either hasn't been done, hasn't been solid enough, or is too mixed to draw a firm conclusion.
If you're thinking about this product for one of those reasons, talk with your pharmacist or doctor about whether the current evidence supports it for you.
How safe is it?
Well-documented data
Black pepper is generally well tolerated when used in food amounts or as a single dose medicine. The most common side effects from taking it orally are a burning aftertaste, indigestion (dyspepsia), and changes in taste perception.
Cough has been reported when the powder is inhaled. A rare allergic reaction — hives, red eyes, facial swelling, and severe cough — has been reported in someone sensitive to black pepper.
The safety notes caution that while food amounts are fine, concentrated piperine supplements should be used more carefully and ideally only with medical advice, since they haven't been as thoroughly studied as everyday food spices.
Meds to double-check
Moderate interaction found
Check your exact medications before taking this product if you use seizure medications (especially phenytoin), blood pressure medications (propranolol), HIV drugs (nevirapine), antibiotics (rifampin), heart medications (atorvastatin), immunosuppressants (cyclosporine), asthma medications (theophylline), or sedatives (pentobarbital). Black pepper can raise blood levels of these drugs in ways that might change how well they work or increase side effects.
The bottom line
Scorecard at a glanceFully disclosed formula with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.
Black pepper extract is fine for most people in small amounts, but this supplement carries real risks if you take seizure medications, blood pressure drugs, HIV antivirals, certain antibiotics, heart medications, or immunosuppressants. If you're on any prescription medication, check with your pharmacist before you start.
If you have a known black pepper allergy, skip it.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Jun 23, 2021.
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 Rephyll Powder, straight from the product label.
| Brand | Nootropics Depot |
|---|---|
| Net contents | 2.11 oz; 60 Gram(s) |
| Market status | On market |
| Date entered into DSLD | Jun 23, 2021 |
| DSLD ID | 251263 |
| Product type | Botanical |
| Supplement form | Powder |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Women (not pregnant or lactating) |
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 Rephyll Powder by Nootropics Depot, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Rephyll (Piper nigrum) extract | 500 mg | -- |
Other ingredients: modified Food Starch, Sunflower Lecithin, Turmeric extract
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.
Formula
Minimum beta-caryophyllene content: 6%
FDA Statement of Identity
Dietary Supplement
General Statements
Disclaimer: Always consult with a qualified health physician before taking any new dietary supplement.
Transfer scoops are not accurate forms of measurement. A milligram scale is needed to accurately measure dosages.
FDA Disclaimer Statement
This product is not intended to diagnose, treat, cure or prevent any diseases. These statements have not been evaluated by the Food & Drug Administration.
Suggested/Recommended/Usage/Directions
Suggested Use: As a dietary supplement, take 500mg once daily.
Precautions
Warning: Keep out of reach of children.
Do not take this or any other supplement if under the age of 18, pregnant or nursing a baby, or if you have any known or suspected medical conditions, and/or taking prescription drug(s) or OTC medication(s).
Do not take this or any other supplement if under the age of 18, pregnant or nursing a baby, or if you have any known or suspected medical conditions, and/or taking prescription drug(s) or OTC medication(s).
Storage
Storage: Store in a cool and dry place. Keep away from direct sunlight and heat.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Rephyll Powder by Nootropics Depot 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 Rephyll Powder by Nootropics Depot
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size500 mg Dosage formPowder Servings per container120 Amounts shown are per serving.
Rephyll (Piper nigrum) extract
Interacts with1,019 drugs
Black pepper is a common kitchen spice that is generally safe in the amounts used in food. Its extract, piperine, is mostly added to supplements to he...
Rephyll (Piper nigrum) extract monograph & interactionsOther (inactive) ingredients: Modified Food Starch, Sunflower Lecithin, Turmeric extract. These complete the product’s ingredient list but are not active constituents.
Rephyll Powder by Nootropics Depot Drug Interactions
HelloPharmacist Interaction Report
Rephyll Powder by Nootropics Depot contains black pepper extract, which interacts with a number of medications.
The main concern is with seizure medications like phenytoin (Dilantin) — black pepper can raise blood levels significantly enough to affect how well the drug works and increase side effects. A single gram of black pepper taken with phenytoin has been shown to roughly double the medication's blood concentration.
Read the full breakdown — every affected drug type, severity by severity
Black pepper also affects blood pressure medications (propranolol), HIV drugs (nevirapine), antibiotics (rifampin), heart medications (atorvastatin), immunosuppressants (cyclosporine), asthma medications (theophylline), and sedatives (pentobarbital) — all by raising their blood levels in your body. The effect happens because piperine, the active compound in black pepper, increases how much of these drugs your gut absorbs and slows how quickly your liver clears them.
Altogether, these interactions span 1,005 individual medications.
If you take any of these drug types or any other prescription medication, run it through the checker below before adding this supplement.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Rephyll Powder?
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 Rephyll Powder interact with 1,019 drugs. Click any drug to see the details.
1 of the 1 ingredient in Rephyll Powder interact with drugs. Each result below shows which ingredient is responsible. Rephyll (Piper nigrum) extract
Ado-trastuzumab EmtansineKadcyla
How Ado-trastuzumab Emtansine interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, black pepper might increase levels of drugs metabolized by CYP3A4.
Read the full Rephyll (piper Nigrum) Extract + Ado-trastuzumab Emtansine interactionAbciximabReoPro
How Abciximab interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, black pepper might increase the risk of bleeding when taken with antiplatelet or anticoagulant drugs.
Read the full Rephyll (piper Nigrum) Extract + Abciximab interactionAbemaciclibVerzenio
How Abemaciclib interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, black pepper might increase levels of drugs metabolized by CYP3A4.
Read the full Rephyll (piper Nigrum) Extract + Abemaciclib interactionAbiraterone
How Abiraterone interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, black pepper might increase levels of drugs metabolized by CYP3A4.
Read the full Rephyll (piper Nigrum) Extract + Abiraterone interactionAbiraterone AcetateYonsa, Zytiga
How Abiraterone Acetate interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, black pepper might increase levels of drugs metabolized by CYP3A4.
Read the full Rephyll (piper Nigrum) Extract + Abiraterone Acetate interactionAbrocitinibCibinqo
How Abrocitinib interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, black pepper might increase the risk of bleeding when taken with antiplatelet or anticoagulant drugs.
Read the full Rephyll (piper Nigrum) Extract + Abrocitinib interactionAcalabrutinibCalquence
How Acalabrutinib interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractP-glycoprotein Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, black pepper might increase levels of P-glycoprotein substrates.
Read the full Rephyll (piper Nigrum) Extract + Acalabrutinib interactionAcarboseGlucobay, Prandase, Precose
How Acarbose interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, black pepper might increase the risk of hypoglycemia when taken with antidiabetes drugs.
Read the full Rephyll (piper Nigrum) Extract + Acarbose interactionAcenocoumarolSintrom
How Acenocoumarol interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, black pepper might increase the risk of bleeding when taken with antiplatelet or anticoagulant drugs.
Read the full Rephyll (piper Nigrum) Extract + Acenocoumarol interactionAcetaminophen, AspirinGemnisyn
How Acetaminophen, Aspirin interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Anticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, black pepper might decrease levels and clinical effects of drugs metabolized by CYP1A2.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Aspirin interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractAnticoagulant/antiplatelet Drugs, Cytochrome P450 1a2 (cyp1a2) Substrates +1 Moderate
Interaction Summary
Theoretically, black pepper might increase the risk of bleeding when taken with antiplatelet or anticoagulant drugs.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, Butalbital, CaffeineEsgic, Esgic Plus, Fiogesic, Fioricet, Repan, Tecnal +1 more
How Acetaminophen, Butalbital, Caffeine interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, black pepper might decrease levels and clinical effects of drugs metabolized by CYP1A2.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Butalbital, Caffeine interactionAcetaminophen, Butalbital, Caffeine, CodeineEsgic with Codeine, Fioricet w/ Codeine
How Acetaminophen, Butalbital, Caffeine, Codeine interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 2d6 (cyp2d6) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates +1 Moderate
Interaction Summary
Theoretically, black pepper might increase levels of drugs metabolized by CYP2D6.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Butalbital, Caffeine, Codeine interactionAcetaminophen, Butalbital, CodeineBancap w/ Codeine
How Acetaminophen, Butalbital, Codeine interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 2d6 (cyp2d6) Substrates Moderate
Interaction Summary
Theoretically, black pepper might decrease levels and clinical effects of drugs metabolized by CYP1A2.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Butalbital, Codeine interactionAcetaminophen, Butalbital, Codeine PhosphatePhrenilin #3
How Acetaminophen, Butalbital, Codeine Phosphate interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 2d6 (cyp2d6) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates Moderate
Interaction Summary
Theoretically, black pepper might increase levels of drugs metabolized by CYP2D6.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Butalbital, Codeine Phosphate interactionAcetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, PhenylephrineHycomine Compound
How Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates +1 Moderate
Interaction Summary
Theoretically, black pepper might decrease levels and clinical effects of drugs metabolized by CYP1A2.
Read the full Rephyll (piper Nigrum) Extract + 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 Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 2d6 (cyp2d6) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates +1 Moderate
Interaction Summary
Theoretically, black pepper might increase levels of drugs metabolized by CYP2D6.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Caffeine, Codeine interactionAcetaminophen, Caffeine, Codeine, SalicylamideCodalan No.1, Codalan No.2, Codalan No.3
How Acetaminophen, Caffeine, Codeine, Salicylamide interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 2d6 (cyp2d6) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates +1 Moderate
Interaction Summary
Theoretically, black pepper might increase levels of drugs metabolized by CYP2D6.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Caffeine, Codeine, Salicylamide interactionAcetaminophen, Caffeine, DihydrocodeineDHC Plus, Panlor DC, Panlor SS
How Acetaminophen, Caffeine, Dihydrocodeine interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates +1 Moderate
Interaction Summary
Theoretically, black pepper might increase levels of drugs metabolized by CYP3A4.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Caffeine, Dihydrocodeine interactionAcetaminophen, Caffeine, IsomethepteneMigralam
How Acetaminophen, Caffeine, Isometheptene interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, black pepper might decrease levels and clinical effects of drugs metabolized by CYP1A2.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Caffeine, Isometheptene interactionAcetaminophen, Caffeine, PyrilamineMidol Max Strength Menstrual
How Acetaminophen, Caffeine, Pyrilamine interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates Moderate
Interaction Summary
Theoretically, black pepper might increase levels of drugs metabolized by CYP3A4.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Caffeine, Pyrilamine interactionAcetaminophen, Chlorpheniramine Maleate, Dextromethorphan HbrVicks Formula 44M Cough, Cold & Flu Relief
How Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 2d6 (cyp2d6) Substrates +1 Moderate
Interaction Summary
Theoretically, black pepper might increase levels of drugs metabolized by CYP3A4.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interactionAcetaminophen, Chlorpheniramine, Codeine, PhenylephrineColrex
How Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 2d6 (cyp2d6) Substrates +1 Moderate
Interaction Summary
Theoretically, black pepper might decrease levels and clinical effects of drugs metabolized by CYP1A2.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interactionAcetaminophen, Chlorpheniramine, DextromethorphanCoricidin II Extra Strength Cold and Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 2d6 (cyp2d6) Substrates +1 Moderate
Interaction Summary
Theoretically, black pepper might decrease levels and clinical effects of drugs metabolized by CYP1A2.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Chlorpheniramine, Dextromethorphan interactionAcetaminophen, Chlorpheniramine, Dextromethorphan HydrobromideCoricidin HBP Maximum Strength Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 2d6 (cyp2d6) Substrates +1 Moderate
Interaction Summary
Theoretically, black pepper might increase levels of drugs metabolized by CYP3A4.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PhenylpropanolamineMulti Symptom Cold Relief
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 2d6 (cyp2d6) Substrates +1 Moderate
Interaction Summary
Theoretically, black pepper might increase levels of drugs metabolized by CYP3A4.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PseudoephedrineChildren's Tylenol Cold Plus Cough, Tylenol Cold Ex Strength
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 2d6 (cyp2d6) Substrates +1 Moderate
Interaction Summary
Theoretically, black pepper might decrease levels and clinical effects of drugs metabolized by CYP1A2.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interactionAcetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, SalicylamideRhinogesic GG
How Acetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, Salicylamide interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 1a2 (cyp1a2) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, black pepper might decrease levels and clinical effects of drugs metabolized by CYP1A2.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, Salicylamide interactionAcetaminophen, Chlorpheniramine, PhenylephrineAlka-Seltzer PLUS, Histex SR, Protid
How Acetaminophen, Chlorpheniramine, Phenylephrine interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates Moderate
Interaction Summary
Theoretically, black pepper might increase levels of drugs metabolized by CYP3A4.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Chlorpheniramine, Phenylephrine interactionAcetaminophen, Chlorpheniramine, Phenylephrine, SalicylamideRhinogesic, Rhinogesic JR
How Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide interacts with Rephyll Powder — through 1 ingredient. Tap an ingredient for the detail:
Rephyll (piper Nigrum) ExtractCytochrome P450 3a4 (cyp3a4) Substrates, Cytochrome P450 1a2 (cyp1a2) Substrates Moderate
Interaction Summary
Theoretically, black pepper might increase levels of drugs metabolized by CYP3A4.
Read the full Rephyll (piper Nigrum) Extract + Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Rephyll Powder with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.
Rephyll (Piper nigrum) extract
Anticoagulant/Antiplatelet Drugs
Theoretically, black pepper might increase the risk of bleeding when taken with antiplatelet or anticoagulant drugs.
In vitro research shows that piperine, a constituent of black pepper, seems to inhibit platelet aggregation. This has not been reported in humans.
Antidiabetes Drugs
Theoretically, black pepper might increase the risk of hypoglycemia when taken with antidiabetes drugs.
Animal research shows that piperine, a constituent of black pepper, can reduce blood glucose levels. Monitor blood glucose levels closely. Dose adjustments might be necessary.
Atorvastatin (Lipitor)
Theoretically, black pepper might increase blood levels of atorvastatin.
Animal research shows that taking piperine, a constituent of black pepper, 35 mg/kg can increase the maximum serum concentration of atorvastatin three-fold. This has not been reported in humans.
Cyclosporine (Neoral, Sandimmune)
Theoretically, black pepper might increase the effects and side effects of cyclosporine.
In vitro research shows that piperine, a constituent of black pepper, increases the bioavailability of cyclosporine. This has not been reported in humans.
Cytochrome P450 2D6 (Cyp2D6) Substrates
Theoretically, black pepper might increase levels of drugs metabolized by CYP2D6.
In vitro research suggests that some constituents of black pepper inhibit CYP2D6. This has not been reported in humans.
Cytochrome P450 3A4 (Cyp3A4) Substrates
Theoretically, black pepper might increase levels of drugs metabolized by CYP3A4.
In vitro research and pharmacokinetic simulation data suggest that piperine, a constituent of black pepper, as well as the pepper fruit seem to inhibit CYP3A4. This has not been reported in humans.
Lithium
Theoretically, black pepper might increase blood levels of lithium due to its diuretic effects. The dose of lithium might need to be reduced.
Black pepper is thought to have diuretic properties.
Nevirapine (Viramune)
Black pepper might increase blood levels of nevirapine.
Clinical research shows that piperine, a constituent of black pepper, increases the plasma concentration of nevirapine. However, no adverse effects were observed in this study.
P-Glycoprotein Substrates
Theoretically, black pepper might increase levels of P-glycoprotein substrates.
In vitro research shows that piperine, a constituent of black pepper, seems to inhibit P-glycoprotein.
Pentobarbital (Nembutal)
Theoretically, black pepper might increase the sedative effects of pentobarbital.
Animal research shows that piperine, a constituent of black pepper, increases pentobarbital-induced sleeping time.
Phenytoin (Dilantin)
Black pepper might increase blood levels of phenytoin.
Clinical research shows that piperine, a constituent of black pepper, seems to increase absorption, slow elimination, and increase levels of phenytoin. Taking a single dose of black pepper 1 gram along with phenytoin seems to double the serum concentration of phenytoin. Consuming a soup with black pepper providing piperine 44 mg/200 mL of soup along with phenytoin also seems to increase phenytoin levels when compared with consuming the same soup without black pepper.
Propranolol (Inderal)
Black pepper might increase blood levels of propranolol.
Clinical research shows that piperine, a constituent of black pepper, seems to increase absorption and slow elimination of propranolol.
Rifampin (Rifadin)
Black pepper might increase blood levels of rifampin.
Clinical research shows that piperine, a constituent of black pepper, seems to increase absorption and serum levels of rifampin.
Theophylline
Black pepper might increase blood levels of theophylline.
Clinical research shows that piperine, a constituent of black pepper, seems to increase absorption and slow elimination of theophylline.
Amoxicillin (Amoxil, Trimox)
Theoretically, black pepper might increase the effects and side effects of amoxicillin.
Animal research shows that taking piperine, a constituent of black pepper, with amoxicillin increases plasma levels of amoxicillin. This has not been reported in humans.
Carbamazepine (Tegretol)
Theoretically, black pepper might increase blood levels of carbamazepine, potentially increasing the effects and side effects of carbamazepine.
One clinical study in patients taking carbamazepine 300 mg or 500 mg twice daily shows that taking a single 20 mg dose of purified piperine, a constituent of black pepper, increases carbamazepine levels. Piperine may increase carbamazepine absorption by increasing blood flow to the GI tract, increasing the surface area of the small intestine, or inhibiting cytochrome P450 3A4 (CYP3A4) in the gut wall. Absorption was significantly increased by 7-10 mcg/mL/hour. The time to eliminate carbamazepine was also increased by 4-8 hours. Although carbamazepine levels were increased, this did not appear to increase side effects. In vitro research also shows that piperine can increase carbamazepine levels by 11% in a time-dependent manner.
Cytochrome P450 1A2 (Cyp1A2) Substrates
Theoretically, black pepper might decrease levels and clinical effects of drugs metabolized by CYP1A2.
In vitro research suggests that black pepper induces CYP1A2. This has not been reported in humans.
Brand information
Manufacturer and brand details for Rephyll Powder, from the product label.
Nootropics Depot
See all Nootropics Depot products- Name
- Nootropics Depot
- Street Address
- 8380 S. Kyrene Rd. Ste. 110
- City
- Tempe
- State
- AZ
- ZipCode
- 85284
- Web Address
- nootropicsdepot.com
Rephyll Powder by Nootropics Depot: Common Questions
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Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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The Full Monographs Behind Rephyll Powder’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Rephyll Powder'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 29 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 Pepper 29 references
- Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Food, Drugs and Cosmetics. 2nd ed. New York, NY: John Wiley & Sons, 1996.
- Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
- Bano G, Amla V, Raina RK, et al. The effect of piperine on pharmacokinetics of phenytoin in healthy volunteers. Planta Med 1987;53:568-9. PubMed
- Bano G, et al. Effect of piperine on bioavailability and pharmacokinetics of propranolol and theophylline in healthy volunteers. Eur J Clin Pharmacol 1991;41;615-7. PubMed
- Cohle SD, Trestrail JD III, Graham MA, et al. Fatal pepper aspiration. Am J Dis Child 1988;142:633-6. PubMed
- Bhardwaj RK, Glaeser H, Becquemont L, et al. Piperine, a major constituent of black pepper, inhibits human P-glycoprotein and CYP3A4. J Pharmacol Exp Ther 2002;302:645-50. PubMed
- Velpandian T, Jasuja R, Bhardwaj RK, et al. Piperine in food: interference in the pharmacokinetics of phenytoin. Eur J Drug Metab Pharmacokinet 2001;26:241-7. PubMed
- Pattanaik S, Hota D, Prabhakar S, et al. Pharmacokinetic interaction of a single dose of piperine with steady-state carbamazepine in epilepsy patients. Phytother Res 2009;23:1281-6.
- Munakata, M., Kobayashi, K., Niisato-Nezu, J., Tanaka, S., Kakisaka, Y., Ebihara, T., Ebihara, S., Haginoya, K., Tsuchiya, S., and Onuma, A. Olfactory stimulation using black pepper oil facilitates oral feeding in pediatric patients receiving long-term en
- Myers, B. M., Smith, J. L., and Graham, D. Y. Effect of red pepper and black pepper on the stomach. Am J Gastroenterol 1987;82(3):211-214.
- Raghavendra, R. H. and Naidu, K. A. Spice active principles as the inhibitors of human platelet aggregation and thromboxane biosynthesis. Prostaglandins Leukot.Essent.Fatty Acids 2009;81(1):73-78. PubMed
- Subehan, Usia, T., Kadota, S., and Tezuka, Y. Mechanism-based inhibition of human liver microsomal cytochrome P450 2D6 (CYP2D6) by alkamides of Piper nigrum. Planta Med 2006;72(6):527-532.
- Kasibhatta, R. and Naidu, M. U. Influence of piperine on the pharmacokinetics of nevirapine under fasting conditions: a randomised, crossover, placebo-controlled study. Drugs R.D. 2007;8(6):383-391. PubMed
- Usia, T., Iwata, H., Hiratsuka, A., Watabe, T., Kadota, S., and Tezuka, Y. CYP3A4 and CYP2D6 inhibitory activities of Indonesian medicinal plants. Phytomedicine. 2006;13(1-2):67-73. PubMed
- Mujumdar, A. M., Dhuley, J. N., Deshmukh, V. K., Raman, P. H., Thorat, S. L., and Naik, S. R. Effect of piperine on pentobarbitone induced hypnosis in rats. Indian J Exp.Biol. 1990;28(5):486-487.
- Panda, S. and Kar, A. Piperine lowers the serum concentrations of thyroid hormones, glucose and hepatic 5'D activity in adult male mice. Horm.Metab Res. 2003;35(9):523-526. PubMed
- Lawless, H. and Stevens, D. A. Effects of oral chemical irritation on taste. Physiol Behav. 1984;32(6):995-998. PubMed
- Hiwale, A. R., Dhuley, J. N., and Naik, S. R. Effect of co-administration of piperine on pharmacokinetics of beta-lactam antibiotics in rats. Indian J Exp.Biol. 2002;40(3):277-281.
- Han, Y., Chin Tan, T. M., and Lim, L. Y. In vitro and in vivo evaluation of the effects of piperine on P-gp function and expression. Toxicol.Appl.Pharmacol. 8-1-2008;230(3):283-289. PubMed
- Sharma, P., Varma, M. V., Chawla, H. P., and Panchagnula, R. In situ and in vivo efficacy of peroral absorption enhancers in rats and correlation to in vitro mechanistic studies. Farmaco 2005;60(11-12):874-883. PubMed
- Aher, S., Biradar, S., Gopu, C. L., and Paradkar, A. Novel pepper extract for enhanced P-glycoprotein inhibition. J Pharm.Pharmacol. 2009;61(9):1179-1186. PubMed
- Zutshi, R. K., Singh, R., Zutshi, U., Johri, R. K., and Atal, C. K. Influence of piperine on rifampicin blood levels in patients of pulmonary tuberculosis. J Assoc.Physicians India 1985;33(3):223-224.
- Marotta, R. B. and Floch, M. H. Diet and nutrition in ulcer disease. Med Clin North Am 1991;75(4):967-979. PubMed
- Subehan, Usia, T., Iwata, H., Kadota, S., and Tezuka, Y. Mechanism-based inhibition of CYP3A4 and CYP2D6 by Indonesian medicinal plants. J Ethnopharmacol. 5-24-2006;105(3):449-455. PubMed
- Gimenez L, Zacharisen M. Severe pepper allergy in a young child. WMJ. 2011 Jun;110(3):138-9.
- Ren T, Yang M, Xiao M, Zhu J, Xie W, Zuo Z. Time-dependent inhibition of carbamazepine metabolism by piperine in anti-epileptic treatment. Life Sci. 2019;218:314-323. PubMed
- Thomas AB, Choudhary DC, Raje A, Nagrik SS. Pharmacokinetics and pharmacodynamic herb-drug interaction of piperine with atorvastatin in rats. J Chromatogr Sci 2021;59(4):371-80. PubMed
- Haron MH, Dale O, Martin K, et al. Evaluation of the Herb-Drug Interaction Potential of Commonly Used Botanicals on the US Market with Regard to PXR- and AhR-Mediated Influences on CYP3A4 and CYP1A2. J Diet Suppl 2022. PubMed
- Lin F, Hu Y, Zhang Y, Zhao L, Zhong D, Liu J. Predicting Food-Drug Interactions between Piperine and CYP3A4 Substrate Drugs Using PBPK Modeling. Int J Mol Sci 2024;25(20):10955. PubMed
Parts of this content are provided by the Therapeutic Research Center, LLC.
DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
© 2021 Therapeutic Research Center, LLC