Interactions on record — worth a quick check against your medications. Based on 4 of 9 ingredients. Check your meds →
Dietary supplement

Fast 5 Blue Razz Ingredients & Drug Interactions

by VPX

Fast 5 Blue Razz label
See full label image
Powder Category: Amino Acid/protein
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Fast 5 Blue Razz 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: Moderate

Fast 5 Blue Razz is a dietary supplement by VPX with 9 active ingredients. Its ingredients are commonly taken for replacing fluids and electrolytes, preventing dehydration during exercise or illness, treating low blood sodium (under medical care).Based on those ingredients, 828 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Vitamin D3, Sodium, PeptoPro Casein Hydrolysate. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against Fast 5 Blue Razz by VPX

Ask about any prescription or over-the-counter medication and we check it for interactions with Fast 5 Blue Razz 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 Fast 5 Blue Razz 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 30, 2026

What’s inside

Partial disclosure
Ingredient Transparency · database check
Partial

Most active ingredients list an amount, but at least one is hidden in a blend or missing.

Why this rating?
  • The label discloses an exact amount for 6 of its 8 active ingredients.
  • “Patent Pending 2:2:1 Ratio BCAAs” is listed as a grouped ingredient — the label gives one combined amount (3,000 mg) without saying how much of each component you get.
  • “Proprietary Designer Peptide Matrix” is a proprietary blend — the label gives one combined amount (1,500 mg) without saying how much of each component you get.

Fast 5 Blue Razz contains 8 active ingredients: sodium, potassium, L-leucine, L-isoleucine, L-valine, vitamin D3, PeptoPro casein hydrolysate, and a proprietary blend of branched-chain amino acids (BCAAs) and peptides. The three free-form amino acids (leucine, isoleucine, valine) and the BCAA blend support muscle metabolism and recovery.

Casein peptides are protein fragments designed for faster absorption. Sodium and potassium are electrolytes that help with fluid balance and muscle function.

The product also contains inactive ingredients: natural and artificial flavors, citric acid, sucralose (a sweetener), and potassium citrate.

Does it work?

Insufficient 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
Insufficient

There isn't enough reliable clinical evidence to rate this product's ingredients for its stated purpose.

Why this rating?
  • The label markets this product for: muscle building and athletic performance support.
  • We looked for evidence on: Athletic performance, Exercise-induced muscle damage, Exercise-induced muscle soreness, Muscle strength, muscle protein synthesis, recovery — and 1 related terms.
  • The closest evidence on file: Vitamin D is rated "Insufficient Reliable Evidence To Rate" for Athletic performance (Natural Medicines).
  • Also on file: Vitamin D is rated "Insufficient Reliable Evidence To Rate" for Muscle strength, Exercise-induced muscle damage.
  • Also on file: Casein Peptides is rated "Insufficient Reliable Evidence To Rate" for Athletic performance, Exercise-induced muscle soreness.

Casein peptides in this product are likely effective for atopic dermatitis (eczema) and food allergies. Vitamin D3 is effective for familial hypophosphatemia, osteomalacia, renal osteodystrophy, rickets, and hypoparathyroidism—though those are specialized medical conditions, not general wellness uses.

For the branched-chain amino acids and other components, effectiveness ratings aren't established in our data.

The evidence, ingredient by ingredient Sodium Potassium Vitamin D Casein Peptides

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 3 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.

Sodium is well tolerated at normal dietary amounts, but high intake is linked to high blood pressure and heart strain. The product's sodium content matters: avoid sodium supplements or very high intake without your doctor's approval, especially if you have blood pressure concerns or kidney disease.

Potassium from food is safe, but potassium supplements can cause dangerously high blood levels in some people, particularly those with kidney problems; use only under medical guidance. Vitamin D is generally safe at recommended doses, but very high doses over time can cause toxicity with symptoms like high blood calcium.

Casein peptides are generally well tolerated in healthy adults but must be avoided by anyone with a milk allergy.

Side effects, ingredient by ingredient Sodium Potassium Vitamin D Casein Peptides

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 4 of the 4 matched ingredients can interact with medications — Potassium, Vitamin D, Casein Peptides, Sodium.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: heart-rhythm medications; lithium.
  • For scale: 829 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.

Before taking this product, have your doctor or pharmacist review it if you take lithium, blood pressure medications (antihypertensives, ACE inhibitors, ARBs, or thiazide diuretics), potassium-sparing diuretics, heart rhythm medications (verapamil, diltiazem, digoxin), steroids (corticosteroids), atorvastatin, or any sodium-containing drugs or supplements. The sodium, potassium, and vitamin D in this product all carry documented interactions with these medication types.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glancePartially disclosed formula with insufficient evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

This product is marketed as a workout recovery drink built on branched-chain amino acids and electrolytes. If you take any blood pressure medication, a diuretic, lithium, heart rhythm drugs, or cholesterol medication, you need to check your specific drugs against the interaction tool on this page before using it.

Talk with your doctor or pharmacist about whether Fast 5 Blue Razz is appropriate for you, especially if you have kidney disease, high blood pressure, or heart problems.

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

Assessment coverage: 4 of 8 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Oct 22, 2015.

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 Fast 5 Blue Razz, straight from the product label.

Brand VPX
Barcode (UPC) 610764180438
Net contents 8.05 oz.; 228 Gram(s)
Market status On market
Date entered into DSLD Oct 22, 2015
DSLD ID 51516
Product type Amino Acid/protein
Supplement form Powder
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), 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 Fast 5 Blue Razz 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:
5.7 Gram(s)
Maximum serving Sizes:
5.7 Gram(s)
Servings per container
40
UPC/BARCODE
610764180438
IngredientAmount% DV
Calories15 {Calories}--
Total Carbohydrates0 Gram(s)--
Protein4 Gram(s)8%
Sodium25 mg1%
Potassium55 mg2%
L-Leucine1200 mg--
L-Isoleucine1200 mg--
L-Valine600 mg--
Vitamin D31000 IU250%
PeptoPro Casein Hydrolysate0 NP--
Patent Pending 2:2:1 Ratio BCAAs3000 mg--
L-Leucyl-L-IsoLeucine Peptide0 NP--
Proprietary Designer Peptide Matrix1500 mg--

Other ingredients: Natural and Artificial flavors, Citric Acid Anhydrous, Sucralean brand Sucralose, Potassium Citrate Monohydrate

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.
FDA Statement of Identity

Dietary Supplement

Brand IP Statement(s)

Fast 5 packs the latest scientific research into a potent muscle building powerhouse. Primarily an intra-workout product, Fast 5 can also be used pre-workout or post-workout. It can also be used to enhance any pre-, intra-, or post-workout product. Furthermore, Fast 5 can be added to protein shakes and/or meals to significantly increase muscle protein synthesis.

Fast 5 also reduces whole body protein breakdown, which in turn increases recovery time and reduces Delayed Onset Muscle Soreness (DOMS). Fast 5 was designed with the elite athlete in mind. The revolutionary Fast 5 muscle building cocktail is YOUR scientific secret to packing on rock hard, ripped muscle FAST!

~ Patent Pending: L-Leucyl-L-Isoleucine; Methods of use of Dipeptides and Tripeptides of Branched Chain Amino Acids and Derivatives ~ Patent Pending: 2:2:1 Leucine, Isoleucine, Valine Ratio is Patent Pending Proprietary Blend of BCAAs

ULTRAPURE

PEPTIDEX

2014 Vital Pharmaceuticals, Inc.

General Statements

During training, muscle protein breakdown is increased, the extent of which is dependent on amino acid availability.

It's the mTOR/GLUT4 Bio-Synergistic Sizzle that's going to give you the muscle and performance edge to kick butt on the field or in the gym!

Be sure to get a copy of Jack Owoc's new book, Super Creatine: New Creatine Peptides Ignite Explosive Muscle Growth! For more info visit vpxsports.com.

Product contains heat and moisture sensitive materials which can cause clumping and settling. Shake well before opening.

Made in USA from Domestic & Imported Ingredients in VPX State of the Art GMP Facilities

Natural & Artificial Flavors

Not a significant Source of Vitamin A, Vitamin C, calcium and iron.

All Right Reserved.

Formula

Fast 5 contains a potent combination of PeptoPro (Casein Protein Hydrolysates) along with a 2:2:1 ratio of BCAAs which are used to fuel working muscles and stimulate muscle protein synthesis. This 2:2:1 Leucien, Isoleucine, Valine Ratio is a VPX Patent Pending Proprietary Blend of BCAAs. Consuming the Patent Pending 2:2:1 ratio of Fast 5 allows you to ignite the explosive muscle building power of not only mTOR, but also GLUT4!

Allergen Information: Contains Milk

Seals/Symbols

PeptoPro

VPX LIVE POWERFULLY

{Non} GMO

GLUTEN FREE GF

VITAL PHARMACEUTICALS GMP

Precautions

Do not purchase if safety seal is broken or missing.

Allergen Information: Contains Milk

Allergen Warning: Manufactured in a facility that processes milk, eggs, shellfish, tree nuts, peanuts, wheat and soy.

Storage

Store container between 15(0)C to 25(0)C (59(0)F to 77(0)F).

FDA Disclaimer Statement

These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure or prevent any disease.

Suggested/Recommended/Usage/Directions

Recommended Use: Fast 5 can be mixed with water during your workout, or with mTORC1 Preworkout mTOR Ignitor before your workout. Mix one (1) level scoop of Fast 5 with 6 ounces of water or your favorite beverage.

General

V002 U.S.

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

See for yourself

Fast 5 Blue Razz by VPX label

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

Fast 5 Blue Razz 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 Fast 5 Blue Razz by VPX

These are the 9 active ingredients this product is made of. Select any to open its full monograph.

Serving size5.7 Gram(s) Dosage formPowder Servings per container40 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.

Protein

4 Gram(s) per serving

Sodium

Interacts with
205 drugs
25 mg per serving

Sodium is an essential mineral and electrolyte your body needs to balance fluids, support nerves, and help muscles work. Most people in modern diets g...

Sodium monograph & interactions

Potassium

Interacts with
62 drugs
55 mg per serving

Potassium is an essential mineral your body needs for nerve signals, muscle function, and a steady heartbeat, and most people get enough from a balanc...

Potassium monograph & interactions

Vitamin D3

Interacts with
715 drugs
1000 IU per serving Form: Cholecalciferol

Vitamin D is a fat-soluble vitamin that helps your body absorb calcium and is important for healthy bones, muscles, and immune function. Many people,...

Vitamin D3 monograph & interactions

Patent Pending 2:2:1 Ratio BCAAs

3000 mg per serving
  • › L-Leucine
  • › L-Isoleucine
  • › L-Valine

Proprietary Designer Peptide Matrix

1500 mg per serving

Other (inactive) ingredients: Natural and Artificial flavors, Citric Acid Anhydrous, Sucralean brand Sucralose, Potassium Citrate Monohydrate. These complete the product’s ingredient list but are not active constituents.

Interaction report

Fast 5 Blue Razz by VPX Drug Interactions

Want to check YOUR meds against Fast 5 Blue Razz?

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
828Drugs
239 Moderate 589 Minor

Ingredients driving the most interactions

Vitamin D3 715
Sodium 205
PeptoPro Casein Hydrolysate 172
Potassium 62

Individual Drug Interactions

The ingredients in Fast 5 Blue Razz interact with 828 drugs. Click any drug to see the details.

4 of the 9 ingredients in Fast 5 Blue Razz interact with drugs. Each result below shows which ingredient is responsible. Vitamin D3 Sodium PeptoPro Casein Hydrolysate Potassium

Each ingredient & the kinds of drugs it affects

For each ingredient in Fast 5 Blue Razz 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.

Vitamin D38 drug types · 715 drugs

Aluminum

Vitamin D might increase aluminum absorption and toxicity, but this has only been reported in people with renal failure.
The protein that transports calcium across the intestinal wall can also bind and transport aluminum. This protein is stimulated by vitamin D, which may therefore increase aluminum absorption. This mechanism may contribute to increased aluminum levels and toxicity in people with renal failure, when they take vitamin D and aluminum-containing phosphate binders chronically.

Likelihood Probable Evidence B
Atorvastatin (Lipitor)

Vitamin D might reduce absorption of atorvastatin.
A small, low-quality clinical study shows that taking vitamin D reduces levels of atorvastatin and its active metabolites by up to 55%. However, while atorvastatin levels decreased, total cholesterol, low-density lipoprotein (LDL) cholesterol, and high-density lipoprotein (HDL) cholesterol levels did not substantially change. Atorvastatin is metabolized in the gut by CYP3A4 enzymes, and researchers theorized that vitamin D might induce CYP3A4, causing reduced levels of atorvastatin. However, this proposed mechanism was not specifically studied.

Likelihood Probable Evidence B
Calcipotriene (Dovonex)

Taking calcipotriene with vitamin D increases the risk for hypercalcemia.
Calcipotriene is a vitamin D analog used topically for psoriasis. It can be absorbed in sufficient amounts to cause systemic effects, including hypercalcemia. Theoretically, combining calcipotriene with vitamin D supplements might increase the risk of hypercalcemia.

Likelihood Probable Evidence D
Digoxin (Lanoxin)

Theoretically, hypercalcemia induced by high-dose vitamin D can increase the risk of arrhythmia from digoxin.
High doses of vitamin D can cause hypercalcemia. Hypercalcemia increases the risk of fatal cardiac arrhythmias with digoxin. Avoid vitamin D doses above the tolerable upper intake level (4000 IU daily for adults) and monitor serum calcium levels in people taking vitamin D and digoxin concurrently.

Likelihood Possible Evidence D
Diltiazem (Cardizem, Others)

Theoretically, hypercalcemia induced by high-dose vitamin D can reduce the therapeutic effects of diltiazem for arrhythmia.
High doses of vitamin D can cause hypercalcemia. Hypercalcemia can reduce the effectiveness of verapamil in atrial fibrillation. Theoretically this could also occur with diltiazem. Avoid vitamin D doses above the tolerable upper intake level (4000 IU daily for adults) and monitor serum calcium levels in people taking vitamin D and diltiazem concurrently.

Likelihood Probable Evidence B
Thiazide Diuretics

Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Thiazide diuretics decrease urinary calcium excretion, which could lead to hypercalcemia if vitamin D supplements are taken concurrently. This has been reported in people being treated with vitamin D for hypoparathyroidism, and also in elderly people with normal parathyroid function who were taking a thiazide, vitamin D, and calcium-containing antacids daily.

Likelihood Probable Evidence D
Verapamil (Calan, Others)

Hypercalcemia induced by high-dose vitamin D can reduce the therapeutic effects of verapamil for arrhythmia.
Hypercalcemia due to high doses of vitamin D can reduce the effectiveness of verapamil in atrial fibrillation. Avoid vitamin D doses above the tolerable upper intake level (4000 IU daily for adults) and monitor serum calcium levels in people taking vitamin D and verapamil concurrently.

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

Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
There is some concern that vitamin D might induce CYP3A4. In vitro research suggests that vitamin D induces CYP3A4 transcription. Additionally, observational research has found that increased UV light exposure and serum vitamin D levels are associated with decreased serum levels of CYP3A4 substrates such as tacrolimus and sirolimus, while no association between UV light exposure or vitamin D levels and levels of mycophenolic acid, a non-CYP3A4 substrate, was found. A small, low-quality clinical study shows that taking vitamin D reduces levels of the CYP3A4 substrate atorvastatin and its active metabolites by up to 55%; however, the clinical effects of atorvastatin were not reduced. While researchers theorized that vitamin D might induce CYP3A4, this proposed mechanism was not specifically studied.

Likelihood Possible Evidence D
Vitamin D3 full monograph & interactions

Sodium7 drug types · 205 drugs

Antihypertensive Drugs

Theoretically, a high intake of dietary sodium might reduce the effectiveness of antihypertensive drugs.
High intake of dietary sodium can increase systolic and diastolic blood pressure. Also, high intake of sodium may necessitate increased use of antihypertensive medications to achieve blood pressure control in some patients, such as those with chronic kidney disease.

Likelihood Probable Evidence A
Corticosteroids

Concomitant use of mineralocorticoids and some glucocorticoids with sodium supplements might increase the risk of hypernatremia.
Mineralocorticoids and some glucocorticoids (corticosteroids) cause sodium retention. This effect is dose-related and depends on mineralocorticoid potency. It is most common with hydrocortisone, cortisone, and fludrocortisone, followed by prednisone and prednisolone.

Likelihood Possible Evidence D
Didanosine (Videx)

Concomitant use of didanosine with additional sodium from dietary or supplemental sources may increase the risk of hypernatremia.
Didanosine formulations contain a significant amount of sodium.

Likelihood Probable Evidence C
Lithium

Altering dietary intake of sodium might alter the levels and clinical effects of lithium.
High sodium intake can reduce plasma concentrations of lithium by increasing lithium excretion. Reducing sodium intake can significantly increase plasma concentrations of lithium and cause lithium toxicity in patients being treated with lithium carbonate. Stabilizing sodium intake is shown to reduce the percentage of patients with lithium level fluctuations above 0.8 mEq/L. Patients taking lithium should avoid significant alterations in their dietary intake of sodium.

Likelihood Probable Evidence B
Sodium Phosphates

Theoretically, concomitant use of sodium phosphate with sodium supplements might increase the risk of hypernatremia.
Use of high doses (> 45 mL in 24 hours) of sodium phosphate, such as those used for bowel cleansing before surgery, can lead to serious electrolyte disturbances, including hypernatremia. The risk of hypernatremia is highest in the elderly and people with other risk factors for electrolyte disturbances.

Likelihood Possible Evidence D
Sodium-Containing Drugs

Concomitant use of sodium-containing drugs with additional sodium from dietary or supplemental sources may increase the risk of hypernatremia and long-term sodium-related complications.
The Chronic Disease Risk Reduction (CDRR) intake level of 2.3 grams of sodium daily indicates the intake at which it is believed that chronic disease risk increases for the apparently healthy population. Some medications contain high quantities of sodium. When used in conjunction with sodium supplements or high-sodium diets, the CDRR may be exceeded. Additionally, concomitant use may increase the risk for hypernatremia; this risk is highest in the elderly and people with other risk factors for electrolyte disturbances.

Likelihood Possible Evidence D
Tolvaptan (Samsca)

Theoretically, concomitant use of tolvaptan with sodium might increase the risk of hypernatremia.
Tolvaptan is a vasopressin receptor 2 antagonist that is used to increase sodium levels in patients with hyponatremia. Patients taking tolvaptan should use caution with the use of sodium salts such as sodium chloride.

Likelihood Probable Evidence C
Sodium full monograph & interactions

PeptoPro Casein Hydrolysate1 drug type · 172 drugs

Antihypertensive Drugs

Theoretically, combining these casein peptides with antihypertensive drugs might increase the risk of hypotension.
Clinical research shows that some casein peptides, including the lactotripeptides isoleucine-proline-proline (IPP) and valine-proline-proline (VPP), can modestly reduce blood pressure in patients with hypertension.

Likelihood Probable Evidence B
PeptoPro Casein Hydrolysate full monograph & interactions

Potassium3 drug types · 62 drugs

Ace Inhibitors (Aceis)

Using ACEIs with high doses of potassium increases the risk of hyperkalemia.
ACEIs block the actions of the renin-angiotensin-aldosterone system and reduce potassium excretion. Concomitant use of these drugs with potassium supplements increases the risk of hyperkalemia. However, concomitant use of these drugs with moderate dietary potassium intake (about 3775-5200 mg daily) does not increase serum potassium levels.

Likelihood Likely Evidence C
Angiotensin Receptor Blockers (Arbs)

Using ARBs with high doses of potassium increases the risk of hyperkalemia.
ARBs block the actions of the renin-angiotensin-aldosterone system and reduce potassium excretion. Concomitant use of these drugs with potassium supplements increases the risk of hyperkalemia. However, concomitant use of these drugs with moderate dietary potassium intake (about 3775-5200 mg daily) does not increase serum potassium levels.

Likelihood Likely Evidence C
Potassium-Sparing Diuretics

Concomitant use increases the risk of hyperkalemia.
Using potassium-sparing diuretics with potassium supplements increases the risk of hyperkalemia.

Likelihood Likely Evidence C
Potassium full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Fast 5 Blue Razz, from the product label.

VPX

See all VPX products
Web Address
VPXSPORTS.COM
Pharmacist Counseling Corner

Fast 5 Blue Razz by VPX: Common Questions

Does Fast 5 Blue Razz by VPX interact with any medications?
Yes. Based on its ingredients, Fast 5 Blue Razz has a known interaction with 828 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Fast 5 Blue Razz contains 9 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.
Can I take this if I have high blood pressure?
The sodium in this product may reduce how well blood pressure medications work, and the casein peptides might lower your blood pressure further. Talk with your doctor or pharmacist before using it, especially if you're on blood pressure medication.
Is this safe during pregnancy?
Sodium is rated likely safe during pregnancy and lactation, but vitamin D is rated possibly unsafe in pregnancy at high doses. Potassium from food is safe, and casein peptides lack sufficient safety data in pregnancy. You'll need to discuss your individual situation with your doctor.
What are casein peptides?
Casein peptides are small fragments of milk protein designed to be absorbed quickly. They're likely effective for food allergies and eczema, but people with a milk allergy must avoid them.
Will this cause side effects?
Most ingredients are generally well tolerated, but high sodium can worsen high blood pressure or heart disease, and high potassium can cause abdominal pain, nausea, diarrhea, or dangerous heart rhythm changes. If you notice unusual symptoms, talk with your doctor.
Does this product have fillers?
It contains inactive ingredients: flavoring, citric acid, sucralose, and potassium citrate—all excipients typical in powdered supplements.

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.

Fast 5 Blue Razz label
Go deeper

The Full Monographs Behind Fast 5 Blue Razz’s Ingredients

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

Herb & supplement monograph

Sodium

Interacts with 205 drugs

Sodium is an essential mineral and electrolyte your body needs to balance fluids, support nerves, and help muscles work. Most people in modern diets get more than enough—often too much—from...

Read the full Sodium monograph → Herb & supplement monograph

Potassium

Interacts with 62 drugs

Potassium is an essential mineral your body needs for nerve signals, muscle function, and a steady heartbeat, and most people get enough from a balanced diet rich in fruits and vegetables. P...

Read the full Potassium monograph → Herb & supplement monograph

Vitamin D

Interacts with 715 drugs

Vitamin D is a fat-soluble vitamin that helps your body absorb calcium and is important for healthy bones, muscles, and immune function. Many people, especially those with low sun exposure,...

Read the full Vitamin D monograph → Herb & supplement monograph

Casein Peptides

Interacts with 172 drugs

Casein peptides are small protein fragments made from milk casein, often studied for mild blood pressure support and relaxation. The evidence is limited and mostly modest, so they should not...

Read the full Casein Peptides monograph →
Sources

Sources & How We Checked

Fast 5 Blue Razz'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 80 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.

Sodium 38 references
  1. Garabedian-Ruffalo SM, Ruffalo RL. Drug and nutrient interactions. Am Fam Physician 1986;33:165-74.
  2. Food and Drug Administration Science Background: Safety of Sodium Phosphates Oral Solution. September 17, 2001. Available at: http://www.fda.gov/cder/drug/safety/sodiumphospate.htm
  3. Coton T, Mallaret C, Coilliot C, Carre D, Guisset M. Severe acute ulcerated gastritis induced by salt. Presse Med 2009;38(3):499-500. PubMed
  4. Frings-Meuthen P, Buehlmeier J, Baecker N, et al. High sodium chloride intake exacerbates immobilization-induced bone resorption and protein losses. J Appl Physiol 2011;111(2):537-542. PubMed
  5. Frings-Meuthen P, Baecker N, Heer M. Low-grade metabolic acidosis may be the cause of sodium chloride-induced exaggerated bone resorption. J Bone Miner Res 2008;23(4):517-524. PubMed
  6. Alam S, Johnson AG. A meta-analysis of randomised controlled trials (RCT) among healthy normotensive and essential hypertensive elderly patients to determine the effect of high salt (NaCl) diet of blood pressure. J Hum Hypertens 1999;13(6):367-74.
  7. Boudville N, Ward S, Benaroia M, House AA. Increased sodium intake correlates with greater use of antihypertensive agents by subjects with chronic kidney disease. Am J Hypertens 2005;18(10):1300-5. PubMed
  8. Bennett WM. Drug interactions and consequences of sodium restriction. Am J Clin Nutr 1997;65(2 Suppl):678S-681S. PubMed
  9. Okusa MD, Crystal LJ. Clinical manifestations and management of acute lithium intoxication. Am J Med 1994;97(4):383-9. PubMed
  10. Food and Nutrition Board, Institute of Medicine. Dietary reference intakes for water, potassium, sodium, chloride, and sulfate. Washington, DC: National Academy Press, 2005. Available at: http://www.nap.edu/openbook.php?record_id=10925. DOI
  11. D'Elia L, Rossi G, Ippolito R, Cappuccio FP, Strazzullo P. Habitual salt intake and risk of gastric cancer: a meta-analysis of prospective studies. Clin Nutr 2012;31(4):489-98. PubMed
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See these in context on the Sodium monograph →

Potassium 12 references
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See these in context on the Potassium monograph →

Vitamin D 26 references
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See these in context on the Vitamin D monograph →

Casein Peptides 4 references
  1. Cicero AFG, Aubin F, Azais-Braesco V, Borghi C. Do the lactotripeptides isoleucine-proline-proline and valine-proline-proline reduce systolic blood pressure in European subjects? A meta-analysis of randomized controlled trials. Am J Hypertens. 2013;26(3): PubMed
  2. Fekete AA, Givens DA, Lovegrove JA. Casein-derived lactotripeptides reduce systolic and diastolic blood pressure in a meta-analysis of randomised clinical trials. Nutrients. 2015;7(1):659-81. PubMed
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See these in context on the Casein Peptides 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.

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