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Dietary supplement

Havoc Ingredients & Drug Interactions

by RPN Recomp Performance Nutrition

Havoc label
See full label image
Capsule Category: Other Combinations
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 Havoc 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

Havoc is a dietary supplement by RPN Recomp Performance Nutrition with 1 active ingredient. Its ingredients are commonly taken for building muscle mass, increasing strength, cutting or losing body fat.Based on those ingredients, 370 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are 2a, 3a-Epithio-17a-Methyl-5a-Androstan-17b-Ol. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Havoc by RPN Recomp Performance Nutrition

Ask about any prescription or over-the-counter medication and we check it for interactions with Havoc by RPN Recomp Performance Nutrition — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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Computed from our clinical databases

HelloPharmacist Scorecard of Havoc by RPN Recomp Performance Nutrition

Four independent checks of what is known — a summary of the available information, not a grade of the product itself.

Evidence for Intended Use
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
Not assessable

The stated purpose hasn't been mapped to our evidence data yet.

Why this rating?
  • We haven't mapped this product's purpose to our evidence data yet — it'll be graded on the next content refresh.
Ingredient Transparency
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.
Known Interaction Concern
Moderate identified

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

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Epistane.
  • The most serious interaction on file is rated Moderate.
  • For scale: 371 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.
Safety Information
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 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

HelloPharmacist summaryFully disclosed formula with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Dec 22, 2019.

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 Havoc, straight from the product label.

Brand RPN Recomp Performance Nutrition
Net contents 90 Capsule(s)
Market status Off market
Date entered into DSLD Dec 22, 2019
DSLD ID 210034
Product type Other Combinations
Supplement form Capsule
Dietary claims / uses All Other
Intended target group(s) Adult (18 - 50 Years)
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 Havoc by RPN Recomp Performance Nutrition, 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:
1 Capsule(s)
Servings per container
90
IngredientAmount% DV
2a, 3a-Epithio-17a-Methyl-5a-Androstan-17b-Ol10 mg--

Other ingredients: Gelatin Capsule, Microcrystalline Cellulose

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

The peak of performance!

FDA Statement of Identity

Dietary Supplement

Suggested/Recommended/Usage/Directions

Directions: Take 2-3 capsules daily as directed by a physician. Do not exceed 3 capsules per day, do not exceed 4 weeks usage per 4 month period.

Precautions

Do not exceed 3 capsules per day, do not exceed 4 weeks usage per 4 month period.

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

See for yourself

Havoc by RPN Recomp Performance Nutrition label

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

Havoc 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 Havoc by RPN Recomp Performance Nutrition

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size1 Capsule(s) Dosage formCapsule Servings per container90 Amounts shown are per serving.

2a, 3a-Epithio-17a-Methyl-5a-Androstan-17b-Ol

Interacts with
370 drugs
10 mg per serving

Epistane is a synthetic anabolic steroid (a methylated 'designer steroid'), not a true dietary supplement or herb, even though it has been sold as a '...

2a, 3a-Epithio-17a-Methyl-5a-Androstan-17b-Ol monograph & interactions

Other (inactive) ingredients: Gelatin Capsule, Microcrystalline Cellulose. These complete the product’s ingredient list but are not active constituents.

Interaction report

Havoc by RPN Recomp Performance Nutrition Drug Interactions

Havoc contains a single active ingredient, and it has known interactions with 370 medications. Here’s the picture, then you can look up your own drug.

Want to check YOUR meds against Havoc?

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
370Drugs
370 Moderate

Ingredients driving the most interactions

2a, 3a-Epithio-17a-Methyl-5a-Androstan-17b-Ol 370

Individual Drug Interactions

The ingredients in Havoc interact with 370 drugs. Click any drug to see the details.

1 of the 1 ingredient in Havoc interact with drugs. Each result below shows which ingredient is responsible. 2a, 3a-Epithio-17a-Methyl-5a-Androstan-17b-Ol

Each ingredient & the kinds of drugs it affects

For each ingredient in Havoc 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.

2a, 3a-Epithio-17a-Methyl-5a-Androstan-17b-Ol1 drug type · 370 drugs

Hepatotoxic Drugs

Theoretically, concomitant use might have additive adverse hepatotoxic effects.
Epistane is an anabolic androgenic steroid, and more specifically a 17-alpha-alkylated androgen. Therefore, there is concern that epistane has hepatotoxic effects. Also, epistane is structurally similar to epitiostanol, which has been associated with hepatotixicity in a case series of four patients.

Likelihood Possible Evidence D
2a, 3a-Epithio-17a-Methyl-5a-Androstan-17b-Ol full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Havoc, from the product label.

RPN Recomp Performance Nutrition

See all RPN Recomp Performance Nutrition products
Name
Recomp Performance Nutrition (RPN)
Pharmacist Counseling Corner

Havoc by RPN Recomp Performance Nutrition: Common Questions

Does Havoc by RPN Recomp Performance Nutrition interact with any medications?
Yes. Based on its ingredients, Havoc has a known interaction with 370 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Havoc contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism 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.

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

Not sure if Havoc is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

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.

Havoc label
Go deeper

The Full Monographs Behind Havoc’s Ingredients

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

Herb & supplement monograph

Epistane

Interacts with 370 drugs

Epistane is a synthetic anabolic steroid (a methylated 'designer steroid'), not a true dietary supplement or herb, even though it has been sold as a 'prohormone.' It is liver-toxic, can disr...

Read the full Epistane monograph →
Sources

Sources & How We Checked

Havoc'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 3 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.

Epistane 3 references
  1. Joseph JF, Parr MK. Synthetic androgens as designer supplements. Curr Neuropharmacol. 2015;13(1):89-100. PubMed
  2. Rahnema CD, Crosnoe LE, Kim ED. Designer steroids - over-the-counter supplements and their androgenic component: review of an increasing problem. Andrology. 2015;3(2):150-5. PubMed
  3. Díaz FC, Sáez-González E, Benlloch S, et al. Albumin dialysis with MARS for the treatment of anabolic steroid-induced cholestasis. Ann Hepatol. 2016;15(6):939-943.

See these in context on the Epistane monograph →

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

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