Major interaction on record — check this product against your medications before combining. Based on 7 of 8 ingredients. Check your meds →
Dietary supplement

Redline Micro-Burst Ingredients & Drug Interactions

by VPX

Redline Micro-Burst label
See full label image
Capsule Category: Other Combinations
Most serious interaction: Major
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Redline Micro-Burst 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

The interaction bottom line Most serious interaction: Major

Redline Micro-Burst is a dietary supplement by VPX with 8 active ingredients. Its ingredients are commonly taken for erectile dysfunction, low sex drive, sexual performance.Based on those ingredients, 1,485 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Indian Barberry, Yohimbe, BioPerine Pepper. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against Redline Micro-Burst by VPX

Ask about any prescription or over-the-counter medication and we check it for interactions with Redline Micro-Burst by VPX — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Redline Micro-Burst by VPX

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.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 11, 2026

What’s inside

Low disclosure
Ingredient Transparency · database check
Low

Most active ingredients don't disclose an individual amount — you can't tell how much of each you're getting.

Why this rating?
  • The label discloses an exact amount for 2 of its 8 active ingredients.
  • “NorEpiphex Alpha2-Andregenic Blockade Complex” is a proprietary blend — the label gives one combined amount (44 mg) without saying how much of each component you get.
  • “Fat Catabolizor & Beta-3 Potentiator” is listed as a grouped ingredient — the label gives one combined amount (381 mg) without saying how much of each component you get.

Redline Micro-Burst contains 8 active ingredients. Caffeine anhydrous is a stimulant that increases alertness and can improve athletic performance.

Theacrine is a compound structurally similar to caffeine that may have stimulant properties, though its effects in humans are not yet well established. Yohimbe (listed twice) is an herbal extract containing yohimbine, which works as a stimulant and may increase blood pressure.

Indian barberry contains berberine, an alkaloid used in traditional medicine. Grains-of-paradise is an African spice.

Black pepper (BioPerine) contains piperine, which may enhance absorption of other compounds. Toothed clubmoss contains huperzine A, which affects brain chemistry.

The product also includes NorEpiphex Alpha2-Andregenic Blockade Complex and Fat Catabolizor & Beta-3 Potentiator, which are proprietary blends. The remaining ingredients are inactive (fillers, binders, and capsule materials).

Does it work?

Strong evidence
Evidence for Intended Use · database check
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
Strong

Clinical evidence supports at least one of this product's ingredients for its stated purpose.

Why this rating?
  • The label markets this product for: Mental alertness, energy, and athletic performance.
  • We looked for evidence on: Mental alertness, Fatigue, Athletic performance, Cognitive function.
  • The strongest evidence on file: Caffeine is rated "Likely Effective" for Athletic performance (Natural Medicines).
  • Also on file: Caffeine is rated "Likely Effective" for Mental alertness.
  • Also on file: Yohimbe is rated "Insufficient Reliable Evidence To Rate" for Athletic performance, Fatigue.

For caffeine, the data shows it is effective for neonatal apnea and postoperative headache, and likely effective for mental alertness and athletic performance. For theacrine, black pepper, Indian barberry, grains-of-paradise, yohimbe, and toothed clubmoss, the evidence in our data is rated insufficient to establish whether they work for their claimed uses — meaning human research hasn't yet provided reliable answers.

The evidence, ingredient by ingredient Yohimbe Caffeine Theacrine Tree Turmeric Grains Of Paradise Black Pepper Toothed Clubmoss

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

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 5 of the 7 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 6 of 7.
  • General safety write-ups exist for 7 of 7.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Caffeine is generally well tolerated in moderate amounts for healthy adults, though high doses can cause serious side effects. Common side effects include anxiety, restlessness, insomnia, tremors, nausea, and headache.

Rarely, stroke has been reported. Caffeine passes into breast milk in small amounts and is rated possibly unsafe in pregnancy at high doses — talk with your doctor about safe intake limits.

Theacrine appears well tolerated in short-term studies, but long-term safety isn't established; avoid it during pregnancy and breastfeeding due to insufficient safety data. Yohimbe can cause serious heart and blood pressure effects and carries unpredictable potency; it is unsafe in pregnancy and breastfeeding.

Reported side effects include anxiety, agitation, sweating, diarrhea, flushing, headache, high blood pressure, rapid heartbeat, tremors, and dizziness — rarely, hypertensive crisis has occurred. Indian barberry is considered likely unsafe in pregnancy and breastfeeding because berberine may harm the fetus and pass to infants.

Black pepper is generally safe in food amounts; pregnancy safety of concentrated supplements is uncertain (rated likely unsafe for certain uses), and lactation safety is not well studied. Toothed clubmoss lacks sufficient safety data in pregnancy and breastfeeding; its active compound huperzine A can cause dizziness, nausea, and sweating.

Grains-of-paradise is likely safe in food amounts but has limited supplement safety data; avoid medicinal amounts in pregnancy and breastfeeding.

Side effects, ingredient by ingredient Yohimbe Caffeine Theacrine Tree Turmeric Grains Of Paradise Black Pepper Toothed Clubmoss

Meds to double-check

Major interaction found
Known Interaction Concern · database check
Major identified

At least one ingredient has a documented Major-severity interaction. Check your medications for a personalized result.

Why this rating?
  • 6 of the 7 matched ingredients can interact with medications — Toothed Clubmoss, Yohimbe, Black Pepper, Caffeine, Tree Turmeric, among others.
  • The most serious interaction on file is rated Major.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; immunosuppressants / transplant drugs; diabetes medications; lithium.
  • For scale: 1,486 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.

Stop and check with your pharmacist before taking this if you use monoamine oxidase inhibitors (MAOIs) — a Major-severity interaction. Also double-check if you take ephedrine, blood-pressure medications, blood thinners (anticoagulants or antiplatelet agents), heart drugs, seizure medications, antidepressants (especially tricyclic types), immunosuppressants (tacrolimus, cyclosporine), antipsychotics, or any drug metabolized by liver enzymes (CYP2D6, CYP2C9, CYP3A4).

These carry Moderate-severity interactions with one or more ingredients.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFormula with limited ingredient disclosure with clinical evidence supporting its stated purpose. Major medication interactions have been identified, and safety information is well characterized.

This product is a multi-ingredient stimulant with serious interaction potential — especially if you take MAOIs, ephedrine, blood-pressure medications, blood thinners, heart drugs, seizure medications, antidepressants, or immunosuppressants. If you're pregnant, breastfeeding, or managing any chronic condition, talk with your pharmacist before starting.

Check your exact medications against the interaction tool on this page.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 8 of 8 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Sep 24, 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

At a glance

General information

Key facts about Redline Micro-Burst, straight from the product label.

Brand VPX
Barcode (UPC) 610764005366
Net contents 100 Multi-Stage Release Cap(s)
Market status On market
Date entered into DSLD Sep 24, 2021
DSLD ID 252256
Product type Other Combinations
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Women (not pregnant or lactating), Gluten Free
From the label
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 Redline Micro-Burst by VPX, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1 Capsule(s)
Maximum serving Sizes:
2 Capsule(s)
Servings per container
50
UPC/BARCODE
610764005366
IngredientAmount% DV
Calories9 Calorie(s)--
Total Fat1 Gram(s)2%
Caffeine Anhydrous250 mg--
Theacrine75 mg--
NorEpiphex Alpha2-Andregenic Blockade Complex44 mg--
Yohimbe0 NP--
Yohimbe0 NP--
Fat Catabolizor & Beta-3 Potentiator381 mg--
Indian Barberry0 NP--
Grains-of-Paradise0 NP--
BioPerine Pepper0 NP--
Toothed Clubmoss0 NP--

Other ingredients: Safflower Oil, Microcrystaline Cellulose, Gelatin, Silicon Dioxide, Magnesium Stearate, Povidone, Hydroxypropyl Cellulose, Crospovidone, purified Water, Titanium Dioxide, Polysorbate 80, Hypromellose, Sodium Carboxymethylcellulose, Sodium Alginate, Ethylcellulose, Ammonium Hydroxide, Oleic Acid, Triacetin, FD&C Blue #2

Tap any ingredient to jump to its full detail below.

Label statements
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.
General Statements

Faster! Stronger! Longer!

Instagram Redline_energy

Formulation

The tri-action, liquid and multi-stage delivery innovation is biotechnology exclusive to VPX. First, the clear faster acting liquid releases submicron actives within seconds. Blue & white microtabs then go to work in minutes and deliver powerful fat incinerating ingredients for many hours.

Gluten free

Faster acting liquid Stronger stacking Longer lasting

Fat Blast Brain Boost

New xtreme two pill formula!

Suggested/Recommended/Usage/Directions

Recommended use: As a dietary supplement, always begin use with 1 to 2 Redline Micro Burst capsules daily to assess your tolerance. Take 1-2 capsules on an empty stomach before breakfast. Take 1 to 2 additional capsules seven hours later on an empty stomach, if desired. Never exceed more than 4 total capsules daily or more than 2 capsules in a single dosage. Do not use product for longer that 8 continuous weeks. Follow each 8 week cycle of use with a 4 week break.

Precautions

Never exceed more than 4 total capsules daily or more than 2 capsules in a single dosage. Do not use product for longer that 8 continuous weeks. Follow each 8 week cycle of use with a 4 week break.

Warning: Not for use by individuals under the age of 18 years.

Do not use if pregnant or nursing. Consult a physician or licensed qualified health care professional before using this product if you have, or have a family history of heart disease, thyroid disease, diabetes, high blood pressure, depression or other psychiatric condition, glaucoma, difficulty in urinating, prostate enlargement, seizure disorder, if you are using a monoamine oxidase inhibitor (MAOI) or any other dietary supplement, prescription drug, or over-the-counter drug containing ephedrine, pseudoephedrine, or phenylpropanolamine (ingredients found in certain allergy, asthma, cough or cold, and weight control products).

Do not exceed recommended serving. Exceeding recommended serving may cause adverse health effects. Discontinue use and call a physician or licensed qualified health care professional before consuming this product. Do not use this product if you are more than 15 pounds overweight. The consumer assumes total liability if this product is used in a manner inconsistent with label guidelines. Do not use for weight reduction. This product is intended for use by healthy individuals only.

Do not use this product if you are pregnant, nursing or have any medical condition.

Caution! Very powerful.

Keep out of reach of children.

Do not purchase if safety seal is broken or missing.

Allergen warning: Produced in a facility that may also process ingredients containing milk, eggs, fish, shellfish, tree nuts, peanuts, wheat and soybeans.

Warning statement: Too much caffeine may cause nervousness, irritability, sleeplessness, and, occasionally, rapid heartbeat. One serving of Redline Micro Burst contains 250 mg of caffeine, which is equivalent to about two cups of coffee.

To report a serious adverse event or obtain product information, contact (954) 641-0570

Seals/Symbols

GMP Vital Pharmaceuticals Made in USA from Domestic & Imported ingredients Manufactured for VPX

Storage

Protect from heat, light and moisture.

Store at 15-25 degrees C (59-77 degrees F)

FDA Statement of Identity

Dietary Supplement

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.

Brand IP Statement(s)

Copyright 2020 Vital Pharmaceuticals, Inc. All rights reserved.

TeaCrine is a registered trademark and protected by patents pending. Serial no. 61/903,362; under exclusive global distribution by Compound Solutions, Inc.

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Redline Micro-Burst by VPX label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Redline Micro-Burst label

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)
What’s inside

The Ingredients in Redline Micro-Burst by VPX

These are the 8 active ingredients this product is made of. Select any to open its full monograph.

Serving size1 Capsule(s) Dosage formCapsule Servings per container50 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.

NorEpiphex Alpha2-Andregenic Blockade Complex

44 mg per serving

Fat Catabolizor & Beta-3 Potentiator

381 mg per serving

Other (inactive) ingredients: Safflower Oil, Microcrystaline Cellulose, Gelatin, Silicon Dioxide, Magnesium Stearate, Povidone, Hydroxypropyl Cellulose, Crospovidone, Purified Water, Titanium Dioxide, Polysorbate 80, Hypromellose, Sodium Carboxymethylcellulose, Sodium Alginate, Ethylcellulose, Ammonium Hydroxide, Oleic Acid, Triacetin, FD&C Blue #2. These complete the product’s ingredient list but are not active constituents.

Interaction report

Redline Micro-Burst by VPX Drug Interactions

Want to check YOUR meds against Redline Micro-Burst?

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 checker
1,485Drugs
19 Major 1,442 Moderate 24 Minor

Ingredients driving the most interactions

Indian Barberry 1,160
Yohimbe 1,125
BioPerine Pepper 1,019
Caffeine Anhydrous 655
Theacrine 248

Individual Drug Interactions

The ingredients in Redline Micro-Burst interact with 1,485 drugs. Click any drug to see the details.

6 of the 8 ingredients in Redline Micro-Burst interact with drugs. Each result below shows which ingredient is responsible. Indian Barberry Yohimbe BioPerine Pepper Caffeine Anhydrous Theacrine Toothed Clubmoss

Each ingredient & the kinds of drugs it affects

For each ingredient in Redline Micro-Burst 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.

Indian Barberry12 drug types · 1,160 drugs

Cyclosporine (Neoral, Sandimmune)

Berberine, a constituent of tree turmeric, can reduce metabolism of cyclosporine and increase serum levels.
Some clinical evidence suggests that berberine inhibits cytochrome P450 3A4 (CYP3A4), which metabolizes cyclosporine.

Likelihood Likely Evidence A
Tacrolimus (Prograf)

Berberine, a constituent of tree turmeric, can inhibit metabolism of tacrolimus and increase plasma levels.
Some clinical evidence suggests that berberine inhibits cytochrome P450 3A4 (CYP3A4), which metabolizes tacrolimus. In a 16-year-old patient with idiopathic nephrotic syndrome who was being treated with prednisone 40 mg/m2 and tacrolimus 6.5 mg twice daily, concomitant use of berberine, a constituent of tree turmeric, 200 mg three times daily increased plasma levels of tacrolimus from 8 to 22 ng/mL and increased serum creatinine levels from 0.7 to 1.2 mg/dL. Following a reduction of tacrolimus dosing to 3 mg daily, the blood concentration of tacrolimus decreased to 12 ng/mL and the serum concentration of creatinine decreased to 0.9 mg/dL.

Likelihood Likely Evidence D
Anticoagulant/Antiplatelet Drugs

Theoretically, tree turmeric might have additive effects when used with anticoagulant and antiplatelet drugs and increase the risk of bleeding.
In vitro and animal research suggest that berberine, a constituent of tree turmeric, can inhibit platelet aggregation.

Likelihood Possible Evidence D
Antidiabetes Drugs

Theoretically, tree turmeric, taken alone or in combination with milk thistle, might increase the risk of hypoglycemia in patients taking antidiabetes drugs.
Clinical research shows that taking a product containing tree turmeric and milk thistle extracts can lower blood glucose levels, glycated hemoglobin (HbA1c), and insulin resistance in patients with type 2 diabetes, including those on antidiabetic agents. Additionally, clinical research suggests that berberine, a constituent of tree turmeric, can lower blood glucose levels.

Likelihood Probable Evidence A
Antihypertensive Drugs

Theoretically, taking tree turmeric along with antihypertensive drugs might have additive effects and increase the risk of hypotension.
Animal research suggests that berberine, a constituent of tree turmeric, can have hypotensive effects. Also, a meta-analysis of clinical research suggests that taking berberine in combination with amlodipine (Norvasc) can lower systolic and diastolic blood pressure when compared with taking amlodipine alone.

Likelihood Possible Evidence D
Cns Depressants

Theoretically, use of tree turmeric along with CNS depressants might increase the risk of additive therapeutic and adverse effects.
Animal research suggests that berberine, a constituent of tree turmeric, can have sedative effects.

Likelihood Possible Evidence D
Cytochrome P450 2C9 (Cyp2C9) Substrates

Theoretically, tree turmeric might increase the levels and clinical effects of drugs metabolized by CYP2C9.
Preliminary clinical evidence suggests that berberine, a constituent of tree turmeric, can inhibit CYP2C9.

Likelihood Possible Evidence B
Cytochrome P450 2D6 (Cyp2D6) Substrates

Theoretically, tree turmeric might increase the levels and clinical effects of drugs metabolized by CYP2D6.
In vitro research and preliminary clinical evidence suggest that berberine, a constituent of tree turmeric, can inhibit CYP2D6.

Likelihood Possible Evidence B
Cytochrome P450 3A4 (Cyp3A4) Substrates

Theoretically, tree turmeric might increase the levels and clinical effects of drugs that are substrates of CYP3A4.
In vitro research and preliminary clinical evidence suggest that berberine, a constituent of tree turmeric, moderately inhibits CYP3A4.

Likelihood Probable Evidence A
Dextromethorphan (Robitussin Dm, Others)

Theoretically, tree turmeric might increase levels of dextromethorphan and potentially increase the risk of adverse effects including drowsiness, confusion, and irritability.
Preliminary clinical research suggests that berberine, a constituent of tree turmeric, can inhibit cytochrome P450 2D6 (CYP2D6) activity and reduce the metabolism of dextromethorphan.

Likelihood Possible Evidence B
Midazolam (Versed)

Theoretically, tree turmeric might increase levels of midazolam and potentially increase the risk of adverse effects including sedation and respiratory depression.
Preliminary clinical evidence suggests that berberine, a constituent of tree turmeric, can inhibit cytochrome P450 3A4 (CYP3A4) activity and reduce metabolism of midazolam.

Likelihood Possible Evidence B
Pentobarbital (Nembutal)

Theoretically, tree turmeric might increase the sedative effects of pentobarbital.
Animal research suggests that berberine, a constituent of tree turmeric, can prolong pentobarbital-induced sleeping time.

Likelihood Possible Evidence D
Indian Barberry full monograph & interactions

Yohimbe13 drug types · 1,125 drugs

Monoamine Oxidase Inhibitors (Maois)

Concomitant use of MAOIs with yohimbe can result in additive effects.
Yohimbine, a constituent of yohimbe, has MAO inhibitory effects. At high doses, yohimbine is a non-selective inhibitor of MAO.

Likelihood Likely Evidence D
Antihypertensive Drugs

Theoretically, yohimbe might reduce the effects of antihypertensive drugs.
Yohimbine, a constituent of yohimbe, is an alpha-2 adrenoceptor antagonist and has been reported to increase blood pressure in clinical research. Theoretically, concomitant use of yohimbe and antihypertensive drugs can interfere with blood pressure control.

Likelihood Probable Evidence D
Clonidine (Catapres)

Theoretically, yohimbe might precipitate clonidine withdrawal.
Chronic clonidine use can downregulate alpha-2 adrenoreceptors. Animal research and one human case report suggest that concomitant administration of yohimbine, an alpha-2 adrenoceptor antagonist, may precipitate clonidine withdrawal and lead to sympathomimetic toxicity, including hypertensive crisis.

Likelihood Possible Evidence D
Cytochrome P450 2D6 (Cyp2D6) Inhibitors

CYP2D6 inhibitors may increase the levels and adverse effects of yohimbine, a constituent of yohimbe.
In vitro and clinical research shows that the yohimbe bark constituent, yohimbine, is metabolized by CYP2D6 isoenzymes. Paroxetine, a cytochrome P450 (CYP) 2D6 inhibitor, increases the maximum serum concentration of yohimbine and reduces the clearance of yohimbine compared to yohimbine alone in patients who are extensive CYP2D6 metabolizers..

Likelihood Probable Evidence B
Cytochrome P450 2D6 (Cyp2D6) Substrates

Theoretically, yohimbe might increase the levels and adverse effects of CYP2D6 substrates.
In vitro research suggests that yohimbine, a constituent of yohimbe bark, inhibits CYP2D6 enzyme activity.

Likelihood Possible Evidence D
Cytochrome P450 3A4 (Cyp3A4) Inhibitors

Theoretically, CYP3A4 inhibitors might increase the levels and adverse effects of yohimbine, a constituent of yohimbe bark.
In vitro and clinical research shows that the yohimbe bark constituent, yohimbine, is metabolized by CYP3A4 enzymes. Theoretically, drugs that inhibit CYP3A4 might increase the levels and adverse effects of yohimbine.

Likelihood Possible Evidence D
Paroxetine (Paxil)

Paroxetine decreases the clearance of yohimbine and may increase its effects.
Paroxetine, a cytochrome P450 (CYP) 2D6 inhibitor, increases the maximum serum concentration of yohimbine by about 350% and reduces the clearance of yohimbine by about 80% compared to yohimbine alone in patients who are extensive CYP2D6 metabolizers. No significant changes in pharmacokinetic parameters of yohimbine were observed with coadministration of paroxetine in patients who are poor CYP2D6 metabolizers.

Likelihood Probable Evidence B
Phenothiazines

Theoretically, using yohimbine with phenothiazines might have additive effects.
Yohimbine, a constituent of yohimbe, has alpha-2 adrenergic antagonist effects. Theoretically, combining it with phenothiazines can cause additive alpha-2 adrenergic antagonism.

Likelihood Possible Evidence D
Stimulant Drugs

Theoretically, taking yohimbe with stimulant drugs can have additive effects.
Yohimbine, a constituent of yohimbe, has sympathomimetic effects and increases blood pressure in a dose-dependent manner. Theoretically, taking yohimbe with stimulant drugs can have additive stimulant and hypertensive effects.

Likelihood Possible Evidence D
Tricyclic Antidepressants (Tcas)

Theoretically, taking yohimbe with TCAs can increase adverse effects.
A small clinical study in patients taking TCAs for at least 4 weeks shows that receiving doses of intravenous yohimbine 2.5-20 mg daily for up to 7 days precipitates severe anxiety, agitation, and tremor. The effects of yohimbe bark itself are unclear; oral yohimbe bark contains 0.6% to 1.38% yohimbine, but it is unclear how much is absorbed.

Likelihood Possible Evidence D
Anticoagulant/Antiplatelet Drugs

Theoretically, combining yohimbe bark with antiplatelet or anticoagulant drugs might have additive effects; however, this has not been reported in clinical research.
Research in healthy adults shows that taking yohimbine, a constituent of yohimbe bark, in doses of 8 mg or more, seems to inhibit platelet aggregation in vitro by binding to the alpha-2 adrenoceptor. The effects of yohimbe bark itself are unclear; yohimbe bark contains 0.6% to 1.38% yohimbine, but it is unclear how much is absorbed.

Likelihood Possible Evidence D
Cytochrome P450 1A2 (Cyp1A2) Substrates

Theoretically, yohimbe might decrease the levels and clinical effects of CYP1A2 substrates.
In vitro research shows that yohimbe extract induces CYP1A2 enzymes.

Likelihood Possible Evidence D
Cytochrome P450 3A4 (Cyp3A4) Substrates

Theoretically, yohimbe might decrease the levels and clinical effects of CYP3A4 substrates.
In vitro research shows that yohimbe extract induces CYP3A4 enzymes.

Likelihood Possible Evidence D
Yohimbe full monograph & interactions

BioPerine Pepper17 drug types · 1,019 drugs

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.

Likelihood Possible Evidence D
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.

Likelihood Possible Evidence D
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.

Likelihood Possible Evidence D
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.

Likelihood Possible Evidence D
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.

Likelihood Possible Evidence D
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.

Likelihood Possible Evidence D
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.

Likelihood Probable Evidence D
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.

Likelihood Probable Evidence D
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.

Likelihood Possible Evidence D
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.

Likelihood Possible Evidence D
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.

Likelihood Possible Evidence B
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.

Likelihood Possible Evidence B
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.

Likelihood Possible Evidence B
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.

Likelihood Possible Evidence D
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.

Likelihood Possible Evidence D
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.

Likelihood Possible Evidence B
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.

Likelihood Possible Evidence D
BioPerine Pepper full monograph & interactions

Caffeine Anhydrous41 drug types · 655 drugs

Ephedrine

Theoretically, concomitant use might increase the risk for stimulant adverse effects.
Use of ephedrine with caffeine can increase the risk of stimulatory adverse effects. There is evidence that using ephedrine with caffeine might increase the risk of serious life-threatening or debilitating adverse effects such as hypertension, myocardial infarction, stroke, seizures, and death.

Likelihood Probable Evidence D
Adenosine (Adenocard)

Theoretically, caffeine might decrease the vasodilatory effects of adenosine and interfere with its use prior to stress testing.
Some evidence shows that caffeine is a competitive inhibitor of adenosine and can reduce the vasodilatory effects of adenosine in humans. However, other research shows that caffeine does not seem to affect supplemental adenosine because high interstitial levels of adenosine overcome the antagonistic effects of caffeine. It is recommended that methylxanthines and methylxanthine-containing products be stopped 24 hours prior to pharmacological stress tests. However, methylxanthines appear more likely to interfere with dipyridamole (Persantine) than adenosine-induced stress testing.

Likelihood Possible Evidence B
Anticoagulant/Antiplatelet Drugs

Theoretically, caffeine may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Caffeine is reported to have antiplatelet activity. Theoretically, it might increase the risk of bleeding when used concomitantly with these agents; however, this interaction has not been reported in humans.

Likelihood Possible Evidence D
Beta-Adrenergic Agonists

Theoretically, large amounts of caffeine might increase the cardiac inotropic effects of beta-agonists.

Likelihood Probable Evidence D
Carbamazepine (Tegretol)

Theoretically, caffeine might reduce the effects of carbamazepine and increase the risk for convulsions.
Animal research suggests that taking caffeine can lower the anticonvulsant effects of carbamazepine and can induce seizures when taken in doses above 400 mg/kg. Human research has shown that taking caffeine 300 mg in three divided doses along with carbamazepine 200 mg reduces the bioavailability of carbamazepine by 32% and prolongs the plasma half-life of carbamazepine 2-fold in healthy individuals.

Likelihood Possible Evidence D
Cimetidine (Tagamet)

Theoretically, cimetidine might increase the levels and adverse effects of caffeine.
Cimetidine decreases the rate of caffeine clearance by 31% to 42%.

Likelihood Likely Evidence B
Clozapine (Clozaril)

Caffeine might increase the levels and adverse effects of clozapine and acutely exacerbate psychotic symptoms.
Caffeine might increase the effects and toxicity of clozapine. Caffeine doses of 400-1000 mg per day inhibit clozapine metabolism. Clozapine is metabolized by cytochrome P450 1A2 (CYP1A2). Although researchers speculate that caffeine might inhibit CYP1A2, there is no reliable evidence that caffeine affects CYP1A2. There is also speculation that genetic factors might make some patients more sensitive to an interaction between clozapine and caffeine. In one case report, severe, life-threatening clozapine toxicity and multiorgan system failure occurred in a patient with schizophrenia stabilized on clozapine who consumed caffeine 600 mg daily.

Likelihood Possible Evidence B
Dipyridamole (Persantine)

Theoretically, caffeine might decrease the vasodilatory effects of dipyridamole and interfere with its use prior to stress testing.
Caffeine inhibits dipyridamole-induced vasodilation. It is recommended that methylxanthines and methylxanthine-containing products be stopped 24 hours prior to pharmacological stress tests. Methylxanthines appear more likely to interfere with dipyridamole (Persantine) than adenosine-induced stress testing.

Likelihood Probable Evidence B
Disulfiram (Antabuse)

Theoretically, disulfiram use might increase the levels and adverse effects of caffeine.
Disulfiram decreases the rate of caffeine clearance.

Likelihood Probable Evidence B
Diuretic Drugs

Theoretically, using caffeine with diuretic drugs might increase the risk of hypokalemia.
Caffeine, especially in excessive amounts, can reduce potassium levels due to stimulation of the sodium-potassium pump. Diuretics can also cause lower potassium levels.

Likelihood Possible Evidence D
Estrogens

Theoretically, estrogens might increase the levels and adverse effects of caffeine.
Estrogen inhibits caffeine metabolism.

Likelihood Probable Evidence B
Ethosuximide (Zarontin)

Theoretically, caffeine might reduce the effects of ethosuximide and increase the risk for convulsions.
Animal research suggests that caffeine 92.4 mg/kg can decrease the anticonvulsant activity of ethosuximide. However, this effect has not been reported in humans.

Likelihood Possible Evidence D
Felbamate (Felbatol)

Theoretically, caffeine might reduce the effects of felbamate and increase the risk for convulsions.
Animal research suggests that a high dose of caffeine 161.7 mg/kg can decreases the anticonvulsant activity of felbamate. However, this effect has not been reported in humans.

Likelihood Possible Evidence D
Flutamide (Eulexin)

Theoretically, caffeine might increase the levels and adverse effects of flutamide.
In vitro evidence suggests that caffeine can inhibit the metabolism of flutamide. However, this effect has not been reported in humans.

Likelihood Probable Evidence D
Fluvoxamine (Luvox)

Theoretically, fluvoxamine might increase the levels and adverse effects of caffeine.
Fluvoxamine reduces caffeine metabolism.

Likelihood Probable Evidence D
Lithium

Abrupt caffeine withdrawal might increase the levels and adverse effects of lithium.
Caffeine has diuretic activity. When abruptly discontinued, caffeine may alter the clearance of lithium. There are two case reports of lithium tremor that worsened upon abrupt coffee withdrawal and 6 case reports of elevated serum lithium levels after reducing or eliminating caffeine intake. In one case, a male with schizoaffective disorder stabilized on lithium had an elevated lithium level after reducing his caffeine intake by 87%. At a later date, he increased his caffeine intake by 6-fold, resulting in a subtherapeutic lithium level and a recurrence of psychiatric symptoms.

Likelihood Probable Evidence D
Monoamine Oxidase Inhibitors (Maois)

Theoretically, concomitant use might increase the risk of a hypertensive crisis.
Caffeine has been shown to inhibit monoamine oxidase (MAO) A and B in laboratory studies. Concomitant intake of large amounts of caffeine with MAOIs might precipitate a hypertensive crisis. In a case report, a patient that consumed 10-12 cups of caffeinated coffee and took the MAOI tranylcypromine presented with severe hypertension. Hypertension was resolved after the patient switched to drinking decaffeinated coffee.

Likelihood Possible Evidence D
Nicotine

Theoretically, concomitant use might increase the risk of hypertension.
Concomitant use of caffeine and nicotine has been shown to have additive cardiovascular effects, including increased heart rate and blood pressure. Blood pressure was increased by 10.8/12.4 mmHg when the agents were used concomitantly.

Likelihood Probable Evidence B
Pentobarbital (Nembutal)

Theoretically, caffeine might decrease the effects of pentobarbital.
Caffeine might negate the hypnotic effects of pentobarbital.

Likelihood Possible Evidence B
Phenobarbital (Luminal)

Theoretically, caffeine might reduce the effects of phenobarbital and increase the risk for convulsions.
Animal research suggests that caffeine can decrease the anticonvulsant activity of phenobarbital. However, the exact mechanism of this interaction is unclear.

Likelihood Possible Evidence D
Phenylpropanolamine

Theoretically, phenylpropanolamine might increase the risk of hypertension, as well as the levels and adverse effects of caffeine.
Concomitant use of phenylpropanolamine and caffeine might cause an additive increase in blood pressure. Phenylpropanolamine also seems to increase caffeine serum levels.

Likelihood Probable Evidence B
Phenytoin (Dilantin)

Theoretically, caffeine might reduce the effects of phenytoin and increase the risk for convulsions.
Animal research suggests that caffeine can decrease the anticonvulsant activity of phenytoin. The effect does not seem to be related to the seizure threshold-lowering effects of caffeine. However, the exact mechanism of this interaction is unclear.

Likelihood Possible Evidence D
Pioglitazone (Actos)

Theoretically, caffeine might increase the levels and clinical effects of pioglitazone.
Animal research suggests that caffeine can modestly increase the maximum concentration, area under the curve, and half-life of pioglitazone, and also reduce its clearance. This increased the antidiabetic effects of pioglitazone. However, the exact mechanism of this interaction is unclear.

Likelihood Possible Evidence D
Quinolone Antibiotics

Theoretically, quinolone antibiotics might increase the levels and adverse effects of caffeine.
Quinolones (also called fluoroquinolones) can decrease caffeine clearance by inhibiting cytochrome P450 1A2 (CYP1A2) enzyme.

Likelihood Probable Evidence B
Riluzole (Rilutek)

Theoretically, concomitant use might increase the levels and adverse effects of both caffeine and riluzole.
Caffeine and riluzole are both metabolized by cytochrome P450 1A2 (CYP1A2), and concomitant use might reduce the metabolism of one or both agents.

Likelihood Possible Evidence D
Caffeine Anhydrous full monograph & all 41 interactions

Theacrine1 drug type · 248 drugs

Cns Depressants

Theoretically, theacrine might alter the effects of CNS depressants.
Animal research shows that low doses of theacrine have sedating effects, whereas high doses might have stimulant effects. Depending on the dose of theacrine used, it might increase or decrease the effects of CNS depressants. However, these effects have not yet been reported in humans.

Likelihood Possible Evidence D
Theacrine full monograph & interactions

Toothed Clubmoss2 drug types · 219 drugs

Anticholinergic Drugs

In animal models, toothed clubmoss and huperzine A, an active constituent of toothed clubmoss, reversed cognitive deficits induced by scopolamine. Theoretically, concurrent use of anticholinergic drugs and toothed clubmoss might decrease the effectiveness of toothed clubmoss or the anticholinergic drug.
Some anticholinergic drugs include atropine, benztropine (Cogentin), biperiden (Akineton), procyclidine (Kemadrin), and trihexyphenidyl (Artane).

Likelihood Possible Evidence D
Cholinergic Drugs

Huperzine A, a constituent of toothed clubmoss, has demonstrated acetylcholinesterase inhibitory properties. Theoretically, concurrent use of toothed clubmoss with cholinergic drugs might have additive effects and increase the risk of cholinergic side effects.
Cholinergic drugs include bethanechol (Urecholine), donepezil (Aricept), echothiophate (Phospholine Iodide), edrophonium (Enlon, Reversol, Tensilon), neostigmine (Prostigmin), physostigmine (Antilirium), pyridostigmine (Mestinon, Regonol), succinylcholine (Anectine, Quelicin), and tacrine (Cognex).

Likelihood Possible Evidence D
Toothed Clubmoss full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Redline Micro-Burst, from the product label.

VPX

See all VPX products
Name
Vital Pharmaceuticals, Inc.
Street Address
1 Bang City Blvd., Suite 100
City
Pembroke Pines
State
FL
ZipCode
33332
Phone Number
(954) 641-0570
Web Address
vpxsports.com
Pharmacist Counseling Corner

Redline Micro-Burst by VPX: Common Questions

Does Redline Micro-Burst by VPX interact with any medications?
Yes. Based on its ingredients, Redline Micro-Burst has a known interaction with 1,485 medications, including 19 rated major. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Redline Micro-Burst contains 8 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Is it safe to use this during pregnancy?
No. Yohimbe is unsafe — it may affect the uterus. Indian barberry is also likely unsafe because berberine may harm the fetus. Caffeine is rated possibly unsafe at high doses in pregnancy. The safety data advises against use; talk with your doctor for personalized guidance.
Can I take this while breastfeeding?
The data advises against it. Yohimbe and Indian barberry are unsafe while breastfeeding. Caffeine does pass into breast milk in small amounts and is rated possibly safe in moderate amounts, but several other ingredients lack sufficient safety data. Chat with your pharmacist or doctor first.
What side effects might I experience?
Caffeine commonly causes anxiety, restlessness, insomnia, tremors, nausea, and headache. Yohimbe may cause anxiety, agitation, sweating, diarrhea, flushing, rapid heartbeat, and dizziness — rarely, a dangerous spike in blood pressure. Toothed clubmoss can cause dizziness, nausea, and sweating. Start with the smallest dose to gauge your tolerance.
Will this really help me with athletic performance or energy?
Caffeine is likely effective for mental alertness and athletic performance. Theacrine's effects in humans aren't yet well established in the data we hold. Other ingredients like yohimbe, black pepper, and Indian barberry lack reliable evidence to support their use for energy or performance in our records.
Why does this product list yohimbe twice?
The ingredient list shows yohimbe appearing twice — this is how it's listed in the product facts. It means yohimbe is included as a separate ingredient component more than once, which may increase its total amount in the formula.
What are the inactive ingredients?
The product contains safflower oil, microcrystalline cellulose, gelatin, silicon dioxide, magnesium stearate, and several other standard binders and capsule materials. These are fillers and binders to hold the capsule together, not active compounds meant to affect your body.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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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.

Redline Micro-Burst label
Go deeper

The Full Monographs Behind Redline Micro-Burst’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Yohimbe

Interacts with 1,125 drugs

Yohimbe is a West African tree bark that contains yohimbine, a compound mainly promoted for erectile dysfunction and as an aphrodisiac. A prescription form of yohimbine has some evidence for...

Read the full Yohimbe monograph → Herb & supplement monograph

Caffeine

Interacts with 655 drugs

Caffeine is a natural stimulant found in coffee, tea, and many other plants and products. In moderate amounts it can boost alertness and reduce tiredness for most healthy adults, but too muc...

Read the full Caffeine monograph → Herb & supplement monograph

Theacrine

Interacts with 248 drugs

Theacrine is a caffeine-like compound found naturally in certain tea plants and is sold in supplements for energy, focus, and mood. Early human studies suggest it may give a stimulant-like b...

Read the full Theacrine monograph → Herb & supplement monograph

Tree Turmeric

Interacts with 1,160 drugs

Tree turmeric (Berberis aristata) is a shrub used in traditional Indian (Ayurvedic) medicine, valued mainly for its berberine content. Early research suggests possible benefits for blood sug...

Read the full Tree Turmeric monograph → Herb & supplement monograph

Grains Of Paradise

Grains of paradise is a West African spice in the ginger family that people use for digestion, as a spice, and more recently in supplements aimed at metabolism. Early human research suggests...

Read the full Grains Of Paradise monograph → Herb & supplement monograph

Black Pepper

Interacts with 1,019 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 help the body absorb other ingredients (li...

Read the full Black Pepper monograph → Herb & supplement monograph

Toothed Clubmoss

Interacts with 219 drugs

Toothed Clubmoss is a moss-like plant best known as the natural source of huperzine A, a compound studied mainly for memory and Alzheimer's disease. Some early research is promising, but the...

Read the full Toothed Clubmoss monograph →
Sources

Sources & How We Checked

Redline Micro-Burst'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.

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 362 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.

Caffeine 236 references
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Grains Of Paradise 2 references
  1. Dietary Supplements: What You Need to Know — NIH Office of Dietary Supplements Source
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Toothed Clubmoss 3 references
  1. Budavari S, ed. The Merck Index. 12th ed. Whitehouse Station, NJ: Merck & Co., Inc., 1996.
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See these in context on the Toothed Clubmoss monograph →

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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

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