Herb & supplement monograph

Cyanostane Drug Interactions, Uses, Effectiveness, Safety & More

Medically reviewed by ·Updated June 2026
What is this page for?

First and foremost: how Cyanostane interacts with medications. The heart of this page is the interaction list — every drug Cyanostane is known to interact with, and how serious each one is.

But these pages have grown well beyond that into a full monograph — what Cyanostane is, what people use it for and how strong the evidence is, its safety and side effects, and answers to the questions we’re asked most — written and reviewed by the clinical staff at HelloPharmacist. It’s educational information from our licensed clinical databases, not medical advice, and we don’t sell or endorse products. Our editorial policy

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Interaction report

Drugs that interact with Cyanostane

0 medications have a known interaction with Cyanostane, graded by severity. Select any drug for the full evidence-based detail.

We don’t currently list any known drug interactions for Cyanostane. This doesn’t guarantee none exist — always confirm with your pharmacist before combining supplements with your medications.

Read The List Like a Pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

  • Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
  • Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
  • Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
  • No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

  • Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
  • Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
  • Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

  • Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
  • Each drug listed above links to the full report for that exact Cyanostane combination — clinical detail, likelihood, evidence level, and citations.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.
Monograph

Cyanostane: Uses, Safety & Side Effects

Medically reviewed by · Reviewed June 2026 ·
The bottom line

Cyanostane (often sold as 'Cyanostane Rx') is not a true dietary supplement or herb — it is marketed as a so-called 'prohormone' or designer anabolic steroid product. These products are not approved as supplements, may be illegal, and carry real risks of liver and hormonal harm, so we cannot recommend their use.

Common forms
Tablets, capsules (sold as a bodybuilding 'supplement')
People commonly use it for
  • Muscle building
  • Strength gains
  • Body recomposition
  • Athletic performance

Popular and traditional uses — not proof it works. See “Uses & effectiveness” below for the evidence.

Safety at a glance
OverallBest avoided

It is marketed as a designer anabolic agent with potential serious liver and hormonal harm; avoid.

PregnancyPossibly Unsafe

When used orally. Prohormones can be converted to active hormones in the body and cause adverse effects such as menstrual irregularities, infertility,...

Read the full pregnancy detail
BreastfeedingPossibly Unsafe

When used orally. Prohormones can be converted to active hormones in the body and cause adverse effects such as menstrual irregularities, infertility,...

Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center). Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

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Overview

Cyanostane is not a traditional herb or a vitamin. It is a name used for a product sold in the bodybuilding world, often labeled 'Cyanostane Rx.' These products are marketed as 'prohormones' or designer anabolic compounds that are meant to act like or convert into anabolic steroids in the body.

Despite being sold on supplement shelves or online, products like this are not the same as the plant-based or nutrient supplements you might think of. Many such designer steroid products have been the subject of warnings from health authorities because they are sold without proper safety testing and may contain unlisted or illegal ingredients.

People typically use it in an attempt to gain muscle and strength quickly. We want to be clear and honest: this is a high-risk product, not a gentle herbal remedy.

How it works

Products marketed this way are generally designed to act as anabolic-androgenic agents — meaning they are intended to mimic testosterone or be converted in the body into compounds that build muscle. This would work by binding to androgen receptors and promoting protein building in muscle tissue.

Because the exact contents of these designer products are often unclear and not verified, the true mechanism and even the true ingredients can be uncertain. Much of what is 'known' is based on the general behavior of anabolic steroids rather than testing of this specific product.

Effectiveness

Does Cyanostane work?

Here’s what the research actually shows for each use — graded by Natural Medicines and reviewed by .

Evidence overview · 4 uses evaluated
4 Insufficient evidence
How to read these evidence grades

Natural Medicines’ 7-point scale. We show each rating’s label word-for-word.

1EffectiveStrong, consistent evidence it works.
2Likely EffectiveGood evidence, though not yet conclusive.
3Possibly EffectiveSome evidence suggests a benefit.
4Possibly IneffectiveSome evidence it may not help.
5Likely IneffectiveFairly strong evidence it doesn’t help.
6IneffectiveStrong evidence it doesn’t work.
7Insufficient Reliable Evidence to RateToo little research to say either way.

For Cyanostane, current evidence isn’t strong enough to rate any specific use. The conditions it has been studied for are listed below.

Also studied for 4 conditions — evidence insufficient to rate
Insufficient Reliable Evidence To Rate Athletic performance
Rating & evidence shown verbatim from Natural Medicines

Although there is interest in using cyanostane for athletic performance, there is insufficient reliable information about the clinical effects of cyanostane for this purpose.

Insufficient Reliable Evidence To Rate Exercise-induced muscle damage
Rating & evidence shown verbatim from Natural Medicines

Although there is interest in using cyanostane for muscle recovery after exercise, there is insufficient reliable information about the clinical effects of cyanostane for this purpose.

Insufficient Reliable Evidence To Rate Muscle strength
Rating & evidence shown verbatim from Natural Medicines

Although there is interest in using cyanostane to increase muscle strength, there is insufficient reliable information about the clinical effects of cyanostane for this purpose.

Insufficient Reliable Evidence To Rate Obesity
Rating & evidence shown verbatim from Natural Medicines

Although there is interest in using cyanostane for weight loss, there is insufficient reliable information about the clinical effects of cyanostane for this purpose.

Source & disclaimer. Effectiveness ratings and evidence summaries are provided by Natural Medicines (Therapeutic Research Center) and shown as licensed. Where Natural Medicines hasn’t rated a use, HelloPharmacist’s pharmacists may add their own reviewed rating and evidence (each such entry is labeled). This is educational information, not medical advice — talk with your pharmacist or doctor before starting, stopping, or changing a supplement.

Safety & precautions

We urge strong caution and recommend avoiding Cyanostane. Designer anabolic and prohormone products have been linked to serious harms, including liver injury (sometimes severe), unhealthy cholesterol changes, high blood pressure, and disruption of the body's natural hormone balance.

People with liver problems, heart disease, hormone-sensitive conditions, or anyone under 18 should not use these products. Men may experience testicular shrinkage and breast tissue growth, and women may experience masculinizing effects such as voice deepening and unwanted hair growth.

Pregnancy and breastfeeding: Avoid completely. Anabolic and androgenic compounds can cause serious harm to a developing baby and are not safe while breastfeeding.

Always talk to a pharmacist or doctor before using any product like this. Be aware that many such products may be illegal to sell as supplements in many countries.

Side effects

Possible side effects associated with anabolic/prohormone products include:

  • Liver toxicity — yellowing of the skin or eyes (jaundice), dark urine, abdominal pain
  • Acne, oily skin, and hair loss
  • Mood changes, irritability, or aggression
  • Unhealthy cholesterol and increased heart risk
  • Hormonal effects: in men, breast growth and reduced fertility; in women, deepening voice and body hair
  • Suppression of the body's own testosterone production

Some of these effects, such as liver damage or heart problems, can be serious or even life-threatening. Stop use and seek medical care right away if you notice signs of liver trouble.

Dosing

There is no established, safe, or recommended dose for Cyanostane because it is not an approved supplement or medicine. We cannot and will not provide dosing guidance for a product that carries these risks.

If you have already taken a product like this or are considering it, please speak with a pharmacist or doctor first. A health professional can help you understand the risks and check on your liver and hormone health.

Pregnancy & Breastfeeding

Cyanostane & Pregnancy

Possibly Unsafe

When used orally. Prohormones can be converted to active hormones in the body and cause adverse effects such as menstrual irregularities, infertility, hair loss, and acne. Prohormones have also been associated with hepatotoxicity and increased risk of cardiovascular disease. The U.S. Food and Drug Administration and other regulatory agencies warn that dietary supplements containing prohormones are dangerous. Avoid using.

  1. Joseph JF, Parr MK. Synthetic androgens as designer supplements. Curr Neuropharmacol. 2015;13(1):89-100.

Cyanostane & Breastfeeding

Possibly Unsafe

When used orally. Prohormones can be converted to active hormones in the body and cause adverse effects such as menstrual irregularities, infertility, hair loss, and acne. Prohormones have also been associated with hepatotoxicity and increased risk of cardiovascular disease. The U.S. Food and Drug Administration and other regulatory agencies warn that dietary supplements containing prohormones are dangerous. Avoid using.

  1. Joseph JF, Parr MK. Synthetic androgens as designer supplements. Curr Neuropharmacol. 2015;13(1):89-100.
DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.

© 2026 Therapeutic Research Center

Pregnancy & lactation ratings: Natural Medicines, Therapeutic Research Center

References & further reading

The 1 references that drive our Cyanostane monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  1. Joseph JF, Parr MK. Synthetic androgens as designer supplements. Curr Neuropharmacol. 2015;13(1):89-100. PubMed
Keep reading

This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.

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

Brand directory

Brands that make products with Cyanostane

4 brands in our database make a supplement containing Cyanostane.

Product directory

Supplement products with Cyanostane

11 products in our database contain Cyanostane. Open any to see its full ingredient list and every drug interaction we check.

Pharmacist Counseling Corner

Cyanostane: Common Questions

What is Cyanostane used for, and does it work?
People use Cyanostane for a range of reasons, but according to the Natural Medicines database the current clinical evidence is insufficient to confirm it works for the specific conditions it has been studied for. See the graded list on this page, and talk to your pharmacist or doctor before relying on it for any condition.
Does Cyanostane interact with prescription medications?
We do not currently list any known drug interactions for Cyanostane. This does not guarantee that none exist, so always confirm with your pharmacist before combining it with your medications.
How are Cyanostane interactions rated?
Each interaction is graded major, moderate, or minor based on how clinically significant it is and the strength of the evidence behind it. Major interactions are the most serious and are best avoided, or used only under close professional supervision.
Is it safe to take Cyanostane with my medications?
It depends on the specific medication. Some combinations are fine, while others call for monitoring, timing changes, or should be avoided. Check your exact drug above and confirm with your pharmacist or doctor before starting, stopping, or changing anything.
Where does this Cyanostane interaction information come from?
Our interaction data is built on the Natural Medicines database — an evidence-graded reference for vitamins, herbs, and supplements — and is reviewed by licensed HelloPharmacist pharmacists, who may add clinical context.
Is Cyanostane a natural herbal supplement?
No. Despite being sold on supplement shelves, it is marketed as a designer anabolic or 'prohormone' product, not a plant-based herb or vitamin.
Is Cyanostane safe to take?
We do not consider it safe. Products like this have been linked to liver damage, heart risks, and hormone problems, and they lack reliable safety testing.
Can I use Cyanostane while pregnant or breastfeeding?
No. Anabolic and androgenic compounds can harm a developing baby and are not safe during breastfeeding, so you should avoid it entirely.
Is it legal?
Many designer anabolic and prohormone products have been flagged or banned by health authorities, so its legal status is questionable. Check with a pharmacist or your local regulations before considering anything like this.

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

Keep exploring

Products that contain Cyanostane

A rotating sample of real supplements in our database that list Cyanostane — open any to see its full ingredients and every drug interaction we check.

See all 11 products with Cyanostane →
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