Laurabolin

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Laurabolin

Medically reviewed

Marina Burgos

Last updated on 10/01/2026

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Laurabolin

Property Description
Active Ingredient Nandrolone laurate (Nandrolone dodecanoate)
Form Oily solution for injection (Depot)
Pharmacological Class Anabolic androgenic steroid (AAS), Androgen ester
General Purpose To promote regrowth of lean body mass and reverse tissue wasting
Origin Synthetic (Testosterone derivative)

What Type of Pharmaceutical is Laurabolin?

Laurabolin is classified as a potent synthetic anabolic androgenic steroid (AAS), belonging to the class of androgen esters and often cited as an estren derivative. Its core structure is a chemically modified testosterone derivative known as a 19-nor compound, which means the methyl group at position C-19 of the steroid backbone has been removed. This structural optimization is intentional, aiming to retain high anabolic (tissue-building) activity while conferring low androgenic activity (masculinizing effects) at therapeutic concentrations. Laurabolin (Nandrolone laurate) is often differentiated from its shorter-acting counterpart, Nandrolone decanoate, by its exceptionally prolonged duration of action, a recognized feature in the field of veterinary endocrinology where this formulation is commonly applied.

Composition and Depot Preparation

The sole active ingredient in this preparation is Nandrolone laurate, also chemically referred to as Nandrolone dodecanoate. The medicine is prepared as an oily solution for injection—a clear, viscous liquid that is designed to be administered via intramuscular or subcutaneous injection. The key functional element is the laurate ester attached to the active steroid, which ensures that the drug forms a slow-dissolving depot at the injection site. This mechanism allows the body to hydrolyze the ester and gradually release the active, un-esterified nandrolone into the bloodstream over an extended period.

General Purpose and Anabolic Action

The general purpose of Laurabolin is to fundamentally support the body’s ability to rebuild tissue by promoting a powerful state of positive metabolism. Due to its optimized structure, the medicine effectively enhances protein synthesis and nitrogen retention, which are essential processes for reversing catabolic (tissue-wasting) states. The resulting anabolic action is primarily directed toward supporting convalescence and promoting the regrowth of lean body mass in situations characterized by severe tissue breakdown. Nandrolone esters possess significant anabolic properties and are used to manage conditions leading to excessive protein loss. This means the medication helps the body conserve vital tissue components needed for physical rebuilding and strength, particularly following periods of stress or debilitation.

What side effects are possible with Laurabolin?

Possible Side Effects and Safety Information: Nandrolone Laurate (Laurabolin)

Laurabolin, containing the active ingredient Nandrolone Laurate, is an anabolic steroid that carries a risk of side effects, primarily due to its hormonal activity. It is essential to be aware of these effects and to use the medication strictly under medical supervision to manage and mitigate potential risks.

General Side Effects

Common side effects associated with anabolic steroids like nandrolone can include headaches, acne, gastrointestinal upset (such as nausea, vomiting, or diarrhea), and fluid retention which can lead to swelling (edema) in the arms or legs. Users may also experience mood changes, including irritability, aggression, or depression, and sleep disturbances (insomnia).

Sex-Specific and Serious Adverse Effects

The following table outlines more serious and gender-specific adverse effects, some of which may be irreversible, particularly with prolonged use or high doses:

Population Potential Adverse Effects
Females Virilization (masculinization) signs: deepening of the voice, facial/body hair growth (hirsutism), male pattern baldness, and clitoral enlargement. Also, menstrual cycle irregularities and altered libido.
Males (Pre-puberty) Penis enlargement and frequent erections.
Males (Post-puberty) Decreased testicular size (atrophy), low sperm count (oligospermia), persistent and painful erections (priapism), and breast enlargement (gynecomastia).

Cardiovascular and Hepatic Risks

Serious risks include cardiovascular toxicity, such as the potential for atherosclerosis (hardening of the arteries), which can increase the risk of heart attack or stroke. Nandrolone use has also been linked to liver abnormalities, including the development of hepatic tumors (most are benign but some malignant cases exist) and peliosis hepatis (blood-filled cysts in the liver), which can be life-threatening and may lead to liver failure. Liver function should be monitored closely during treatment. Individuals with pre-existing heart, liver, or kidney conditions require special caution, as the drug can exacerbate these issues through fluid retention.

Overdose and Emergency Response

Overdose and when to seek help

The regulatory classification of overdose for Laurabolin (Nandrolone laurate) focuses on the consequences of chronic drug excess due to its long-acting depot nature, rather than acute toxicity.

Documented Overdose Presentations

Overexposure may manifest as virilization signs in female patients, including deepening of the voice, hirsutism, and clitorimegaly. In males, chronic excess can cause endocrine suppression, such as testicular atrophy and decreased libido. Other documented presentations include systemic edema (fluid retention) and, in specific populations, hypercalcemia (elevated serum calcium).

Severe Outcomes and Immediate Actions

Severe outcomes resulting from prolonged, high-dose exposure include hepatic neoplasms and the potential for life-threatening intra-abdominal hemorrhage.

Immediate medical attention must be sought for acute, severe complications, particularly for unexplained abdominal pain that may indicate hemorrhage. The official label mandates that drug therapy must be discontinued immediately upon the first evidence of mild virilism or documented hypercalcemia.

Supportive Measures and Monitoring

No specific antidote is known. Treatment for overdose is limited to providing symptomatic and supportive measures. Specialized monitoring requirements exist, including periodic determination of serum calcium levels, hematocrit, and, in prepubertal patients, bone age to track the effects of chronic excess.

Therapeutic Uses of Laurabolin

What Laurabolin Treats: Main Uses and Benefits


The therapeutic use of Laurabolin (Nandrolone laurate) is relevant when supportive symptom management is appropriate in the face of severe, debilitating illness. Its core application is used for managing conditions presenting with systemic or localized discomfort. Anabolic agents such as nandrolone may be part of symptomatic management for wasting syndromes associated with various chronic diseases, including AIDS, chronic obstructive pulmonary disease, and renal failure.

Reversing Systemic Wasting and Severe Debility

This medication is applied in clinical settings marked by severe catabolic states and wasting syndromes, where symptoms that create noticeable physiological strain may be present. It is used for managing physical debility and contributes to easing the burden of physical weakness, which assists with maintaining functional stability. It is commonly used to help with supporting patients during convalescence following trauma or major surgery, to support the rebuilding of tissues lost due to heightened systemic burden.

Enhancing Musculoskeletal Support

Therapeutically, this agent assists with maintaining functional stability by aiding in the repair of damaged bone tissue, including the management of non-union fractures, and helping to maintain bone density. It supports general well-being and contributes to improved comfort by easing chronic fatigue and physical weakness.


Quick Fact: Relevant for easing symptoms related to severe catabolic states and wasting syndromes.

Eligibility and Restrictions for Use

The eligibility for Laurabolin (Nandrolone laurate) is strictly defined by official regulatory criteria, primarily based on contraindications and mandated caution for specific patient groups.

Populations for Whom Use is Contraindicated

Absolute non-eligibility applies to: Pregnant women (due to high fetal risk), male patients with confirmed or suspected carcinoma of the prostate or male breast carcinoma, and female patients with breast carcinoma that includes hypercalcemia. Use is also strictly contraindicated for individuals with known hypersensitivity to the active substance or its excipients.

Populations Requiring Conditional Use

Use requires caution in patients with pre-existing cardiac, renal, or hepatic disease due to the potential for fluid retention. Women must be closely monitored for signs of virilization, necessitating immediate discontinuation if symptoms appear. For pediatric patients, use is restricted due to the risk of accelerating bone maturation; periodic bone age assessment is required. Use is not recommended for lactating women, as safety and excretion into breast milk are not established.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Laurabolin's official interaction profile is defined by its pharmacodynamic and metabolic effects on specific medicinal product categories, as stated in regulatory documents.

Documented Pharmacodynamic and Metabolic Interactions

Co-administration with Anticoagulants, specifically Coumarin derivatives, may officially potentiate their effects, which increases the documented risk of hemorrhage. This interaction mandates close monitoring of blood clotting parameters.

The drug is also documented to have a metabolic interaction with Antidiabetic Agents (Insulin and Oral Hypoglycemics) due to its known effect of altering insulin sensitivity and lowering blood glucose levels. Co-use of Adrenal Steroids (Corticosteroids) or ACTH can have an additive pharmacodynamic effect, officially increasing the risk of fluid retention (edema).

Interaction-Related Constraints and Notes

No specific medicinal product is formally listed as a drug-drug contraindication in the official regulatory labeling, and no mandatory timing separation rules are recorded. A specific population caution exists for Diabetic Patients; the interaction with antidiabetic agents is highlighted as requiring careful monitoring and potential dosage adjustment of the antidiabetic regimen due to the effect on glucose control. No interactions with food, alcohol, or herbal products are explicitly detailed in the official regulatory documents.

Mechanism of Action

Laurabolin is a prodrug composed of the steroid nandrolone esterified with lauric acid. Following administration, the laurate ester is slowly hydrolyzed in the systemic circulation to release the pharmacologically active parent compound, nandrolone (19-nortestosterone). Nandrolone functions as an Androgen Receptor (AR) agonist.

After entering target cells, nandrolone binds to the intracellular AR, a ligand-activated transcription factor. Ligand binding induces a conformational change in the receptor protein, facilitating its translocation from the cytoplasm into the nucleus. Within the nucleus, the activated AR dimerizes and subsequently binds to specific DNA sequences known as Androgen Response Elements (AREs) located in the promoter regions of target genes. This binding event modulates gene transcription, leading to increased synthesis of mRNA and, consequently, greater protein synthesis, particularly in skeletal muscle and bone tissue, which comprises the anabolic effect.

System-level physiological consequences include modulation of nitrogen, calcium, and phosphorus metabolic balance, resulting in a shift toward a net positive protein and mineral balance in associated tissues. Nandrolone exhibits a relatively reduced interaction with the 5alpha-reductase enzyme compared to testosterone, minimizing its conversion to the more androgenic 5alpha-dihydronandrolone.

Dosage and Administration Information

The administration of Laurabolin (Nandrolone laurate) is determined by its unique pharmaceutical form and the duration of its activity. The medicine is supplied as an oily solution for injection (25 mg/ml) and is intended solely for parenteral use.

Administration Protocol

Field Official Instruction Summary
Route of Administration The approved routes are Intramuscular (IM) or Subcutaneous (SC) injection.
Frequency Pattern The schedule is intermittent, based on a long interval due to the sustained-action effect.
Interval Between Doses Administration is typically scheduled with a period of approximately 21 days between injections.
Preparation Requirements The oily solution must be warmed in the hand if viscous to ensure proper fluid state for administration; a sterile, dry needle must be used.
Age-Group Rules No specific human age-group rules (pediatric/older adults) are documented for this specific formulation.

Usage Principle

The laurate ester formulation facilitates the formation of a sustained-action depot, which is the core principle dictating the non-daily, intermittent dosing schedule. This structure ensures the gradual release of the compound over a prolonged period, thus guiding the required procedural steps and frequency of use. The regimen is strictly based on fixed intervals and must be administered using aseptic technique.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Laurabolin

Evidence for Use in Wasting Syndromes and Severe Catabolic States

Clinical research primarily utilized Randomized Controlled Trials (RCTs) and systematic reviews to examine the active compound, Nandrolone, often using different ester formulations. These studies explored adults experiencing severe tissue loss and debility associated with conditions like HIV or critical illness. Researchers monitored outcomes related to systemic imbalance, including changes in Lean Body Mass (LBM), Nitrogen balance, and physical function (such as muscle strength). Findings reported observed changes in LBM and alterations in Nitrogen balance during the short-term study periods.

Data on the specific Laurabolin (laurate) formulation in human populations are limited. Many historical studies had modest sample sizes, and findings regarding physical function were mixed. Long-term effects are not fully established concerning the durability of these changes over several years.

Evidence for Musculoskeletal Support and Bone Density

Research regarding the study of musculoskeletal markers included clinical trials focused on populations with osteoporosis or chronic debility, such as postmenopausal women. Studies explored markers like Bone Mineral Density (BMD) at key skeletal sites, as well as associated changes in physical strength.

Analyses of trials reported how bone density markers evolved in the observed populations. However, the evidence is mainly derived from older Nandrolone formulations. Researchers focused on BMD, which is a surrogate endpoint, meaning the amount of data on long-term outcomes, such as changes in fracture event rates, remains limited. Evidence quality varies, and subgroup findings are uncertain.

Key Studies & References

  1. WHO ATC/DDD Index: A14AB01 Nandrolone

Frequently Asked Questions (FAQ)

Common questions about Laurabolin (FAQ)

Q: Why is Laurabolin sometimes used in veterinary medicine, and does this relate to human use?

A: Laurabolin is officially indicated in veterinary medicine for certain animals (like dogs and cats) to manage conditions involving excessive tissue breakdown or to support repair processes. This use is related to the drug's general anabolic (tissue-building) class effect. This same core mechanism, promoting lean body mass, is why the active compound, Nandrolone, is also studied and used in human medicine for managing wasting syndromes.

Q: Is Laurabolin the same as other Nandrolone-based treatments?

A: Laurabolin is not identical to other Nandrolone treatments; it contains the laurate ester, which influences how the drug is absorbed and released. Official product information indicates the laurate ester gives Laurabolin a longer duration of action—approximately three to four weeks—compared to other esters like Nandrolone decanoate. This difference directly impacts the required administration interval.

Q: What is the typical duration of action of a single dose of Laurabolin?

A: Due to its design as a depot injection, the effects of a single administration of Laurabolin are documented to be long-lasting. Regulatory information indicates that the therapeutic effects typically endure for approximately three to four weeks. This long duration of action is why the recommended administration schedule involves long intervals between injections.

Q: Does Laurabolin have any known effects on sleep patterns?

A: Official safety information for the class of compounds (anabolic steroids like Nandrolone) lists sleep disorders as a possible adverse effect. It is important to be aware that sleep patterns may be influenced while using this medication.

Q: Is there any risk of dependence or withdrawal symptoms associated with Laurabolin?

A: Yes, the active compound in Laurabolin, Nandrolone, is classified as a Schedule III controlled substance in the United States, and similarly controlled in other regions. This classification is given because the compound carries a known potential for abuse and dependence.

Q: Is it possible for Laurabolin to affect fertility?

A: Studies and official information indicate that the hormonal effects of Nandrolone can potentially affect fertility. In males, this may involve decreased sperm count and testicular size. In females, it can cause irregularities in the menstrual cycle. These are documented hormonal effects that impact reproductive health.

Q: What should I do if I suspect I'm experiencing an unusual side effect from Laurabolin?

A: Adverse effects should be reported promptly to a healthcare professional, the prescribing veterinarian, or the relevant national drug safety agency. This is the standard procedure outlined in official guidelines for reporting any suspected or unusual side effects from medication.

Q: Does the use of alcohol affect the safety or effectiveness of Laurabolin?

A: Official regulatory documents do not provide specific warnings or constraints detailing an interaction between Laurabolin and alcohol. They do not contain explicit instructions to avoid alcohol.

Q: Is there a link between Laurabolin use and liver function problems?

A: Yes, official safety information indicates that the use of Nandrolone can be associated with liver abnormalities. These risks include the potential development of hepatic tumors and blood-filled cysts (peliosis hepatis). Liver function monitoring is typically advised during treatment due to these documented risks.

Q: What is the difference between an anabolic and androgenic effect of Laurabolin?

A: The difference relates to the type of biological effect. Anabolic action is the intended effect of promoting a positive nitrogen balance for tissue-building (muscle and bone). Androgenic action refers to potential masculinizing effects. Laurabolin is structurally optimized for marked anabolic action while minimizing androgenic activity at recommended doses.

Q: How does the long half-life of Laurabolin impact its administration schedule?

A: The long half-life directly dictates the required administration schedule. Because the drug forms a long-acting depot at the injection site, the active compound is released slowly over time. This sustained action allows the administration to be intermittent with a long interval—typically around 21 days—between injections, unlike daily medicines.

Q: What are the general benefits people seek when using Laurabolin?

A: The general purpose of Laurabolin, according to clinical particulars, is to support the body in rebuilding tissue. The documented benefits sought are to promote the regrowth of lean body mass and reverse severe catabolic (tissue-wasting) states or support extensive repair processes.

Q: Are there any known long-term side effects associated with prolonged Laurabolin use?

A: Official safety information warns that prolonged use or administration of high doses has been associated with severe and potentially irreversible adverse effects. These include clitoral enlargement and deepening of the voice in females, and testicular size decrease in males, as well as serious risks like hepatic tumors.

Q: Is Laurabolin considered a controlled substance in many countries?

A: Yes, the active compound, Nandrolone, is considered a controlled substance in many jurisdictions. For example, it is classified as a Schedule III controlled substance in the United States due to its chemical nature and potential for misuse.

Q: Can Laurabolin influence mood disorders like anxiety or depression?

A: The side effect profile for Nandrolone-class compounds indicates a potential influence on emotional state. Reported adverse effects include general mood changes, as well as irritability, aggression, and depression.

Q: How important is adherence to the administration schedule for Laurabolin effectiveness?

A: Adherence to the fixed schedule is crucial because the dosing regimen is based on the compound’s unique sustained-action depot mechanism. Following the fixed intervals, such as the typical 21-day period, helps ensure a consistent and steady therapeutic level of the active drug is maintained in the body.

Q: Can Laurabolin be used by women, and what are the specific considerations?

A: Official guidelines state that use in women requires close monitoring for signs of virilization (masculinization), such as deepening of the voice or abnormal hair growth. If these symptoms appear, discontinuation of the medication is typically required.

Q: Are the side effects of Laurabolin different for men and women?

A: Yes, the safety information lists both general side effects (such as headaches and acne) and sex-specific adverse effects. For example, females are at risk of virilization, while males may experience decreased testicular size or gynecomastia (breast enlargement).

Q: Does Laurabolin affect bone density?

A: Studies and official information indicate that the active compound, Nandrolone, has been clinically researched regarding its effects on Bone Mineral Density (BMD). It has been explored in populations with conditions like osteoporosis, reflecting its intended therapeutic role in musculoskeletal support.

Q: Does the ester (laurate) in Laurabolin affect its potency or just its release time?

A: Official information indicates that the laurate ester primarily affects the release time of the drug. The ester is key to creating a long-acting depot, which ensures the gradual release of the active parent compound, nandrolone, which provides the therapeutic effects.

Q: Is it true that Laurabolin has a relatively low risk of estrogen conversion?

A: The structural modification of Nandrolone, known as a 19-nor compound, is designed to confer high anabolic activity while aiming for a relatively reduced risk of aromatization (conversion into estrogen) when compared to native testosterone.

Q: Can Laurabolin be used in patients with kidney issues?

A: Use requires caution in patients with pre-existing renal (kidney) disease due to the potential risk of fluid retention. Additionally, the drug has been used to support the management of chronic renal failure in target species.

Q: Are there any known contraindications related to heart conditions for Laurabolin?

A: A specific caution is mandated for patients with pre-existing cardiac (heart) disease. This is due to the potential for the drug to cause fluid retention (edema), which could potentially exacerbate existing heart conditions.

Q: How does Laurabolin affect the body's natural hormone production?

A: As an androgen, the active compound in Laurabolin affects the body’s endocrine system. Studies and official information indicate that its use can cause a reduction or suppression of the body's natural production of hormones, particularly testosterone.

How should Laurabolin be stored and disposed of?

How to Store and Dispose of Laurabolin

Official regulatory documents prescribe specific conditions for storing and handling Laurabolin (Nandrolone laurate) solution for injection.

Mandatory Storage Conditions

The product must not be stored above 25 °C and should be kept in the outer carton to protect from light. If the oily solution becomes viscous at low temperatures, it can be gently warmed in the hand to restore its normal state. As a critical safety requirement, the medicine must be stored out of the sight and reach of children.

Stability and Disposal

The unopened shelf life is 36 months. However, once the vial is first opened, the solution must be used within 28 days, and any remaining product must be discarded afterward. Any unused medication or waste materials should be disposed of in accordance with local requirements.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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