Cadec

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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 Cadec

What is Cadec? Definition, Classification, and Composition

Property Description
Active Ingredient Nandrolone (typically as the decanoate ester)
Form Sterile Solution for Injection
Pharmacological Class Anabolic-Androgenic Steroid (AAS)
General Purpose Promote anabolism and tissue building
Origin Synthetic derivative of testosterone

Definition, Classification, and Chemical Foundation

Cadec is a prescription trade name for a synthetic hormone preparation whose active compound is nandrolone, which is formally classified as an anabolic-androgenic steroid (AAS). This substance is a modified derivative of the hormone testosterone, structured specifically as a 19-nortestosterone derivative. This chemical alteration is designed to minimize the compound’s potent androgenic effects while preserving significant tissue-building potential, a key differentiating factor from unesterified testosterone.

Composition, Form, and Drug Type

The medication is supplied as a sterile solution for injection intended for intramuscular use, and it is strictly a prescription product not available in an oral form. The formulation typically utilizes the active ingredient as the nandrolone decanoate ester, which is dissolved within an oleaginous vehicle, or oil solution. This specific composition allows the drug to function as a long-acting prodrug. The oil base ensures the nandrolone decanoate is slowly released from the muscle, maintaining effective concentrations over an extended period, which simplifies the administration schedule.

General Purpose and Core Anabolic Action

The primary purpose of Cadec is to drive anabolic effects, encompassing the body's constructive metabolic processes. Nandrolone achieves this by binding to the androgen receptor, which promotes protein synthesis and positive nitrogen balance in cells. This action is generally utilized to support the systemic rebuilding of lean tissue mass and improve the structural integrity of the skeletal system, making it particularly relevant where involuntary muscle wasting or loss of bone density is a concern. The drug’s key characteristic is its capacity to favor these anabolic functions over secondary masculinizing actions.

Regulatory References

  1. MedlinePlus Information

What side effects are possible with Cadec?

Official Safety Profile of Cadec (Nandrolone Decanoate)

The officially documented safety profile for Cadec, based on regulatory information, outlines a range of possible adverse reactions grouped primarily by the physiological system they affect. The most frequently observed non-serious effects involve the Genitourinary, Metabolic, and Skin system-organ classes, including edema (fluid retention), changes in libido, acne, and hirsutism (excessive hair growth) [1.6, 2.2].


Serious Adverse Reactions and Systemic Risks

Regulatory documents emphasize several serious adverse reactions. These include the risk of Hepatocellular neoplasms (liver tumors) and Peliosis Hepatis (blood-filled cysts in the liver and spleen), which are risks associated with long-term exposure to anabolic-androgenic steroids. There is also an alteration to the blood lipid profile—specifically increased serum LDL and decreased HDL—which may affect the risk of atherosclerosis and cardiovascular events [1.6, 2.1].


Population-Specific Safety Considerations

Specific safety warnings exist for certain populations. In women, mandatory warnings address virilization (e.g., deepening of the voice, clitoral enlargement), noting that some of these changes may be irreversible even after discontinuing therapy. For children and adolescents, there is a risk of accelerated bone maturation and premature closure of the epiphyses, potentially compromising adult stature. Patients with pre-existing cardiac, renal, or hepatic disease require caution due to the risk of fluid and electrolyte retention leading to edema [1.6, 2.3].


Safety Restrictions

Cadec is strictly contraindicated in patients with known or suspected carcinoma of the prostate or testis, male mammary carcinoma, and during pregnancy due to the potential for fetal masculinization. It is also restricted in individuals with a known hypersensitivity to the active substance or its excipients [2.3].

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory information states that reports of acute overdosage in man are not readily available for Nandrolone Decanoate, and the acute toxicity in animal studies is low. The primary documented risk profile is centered on the consequences of chronic overexposure or prolonged misuse of supra-therapeutic doses.

Such chronic exposure is associated with the potential for severe, life-threatening outcomes affecting critical systems. These include serious hepatic adverse effects, such as the development of liver tumors, and significant cardiovascular adverse effects, which involve risks for atherosclerosis and heart failure. Chronic overexposure also results in pronounced hormonal effects, such as virilization in women and testicular atrophy in men.

In all cases of suspected overdose or prolonged overexposure, immediate medical attention must be sought due to the potential for these severe systemic complications.

The officially documented management protocol consists of symptomatic and supportive measures, as no specific antidote is known. Treatment typically involves discontinuation of the drug and requires close hospital monitoring to observe and manage the severe complications.

Therapeutic Uses of Cadec

The primary therapeutic role of Cadec (Nandrolone Decanoate) generally plays a role in managing systemic support in contexts where the body is experiencing a severe, involuntary loss of essential tissues or a critical deficiency in blood components.

Cadec is commonly applied in managing conditions marked by heightened physiological stress, such as involuntary muscle wasting and debilitating syndromes, anemia associated with chronic renal failure, and the structural compromise of severe postmenopausal osteoporosis. It is used for managing conditions that involve the severe loss of lean tissue mass, and may assist with maintaining functional stability and physical robustness, contributing to easing the overall symptom load.

“The medication is relevant in clinical settings that involve chronic systemic imbalance where supportive symptom management is appropriate.”

The medication is relevant in the therapeutic management of anemia and structural deficiencies, helping address symptoms that interfere with daily functioning and create noticeable physiological strain. Cadec may assist with easing the persistent weakness associated with blood deficiency and supports the structural stability of weakened bones, contributing to improved day-to-day comfort during symptomatic periods.

Quick Fact: Relief for Systemic Weakness and Fatigue Cadec generally assists with managing general weakness and fatigue by supporting the management of symptoms related to systemic imbalance.

Eligibility and Restrictions for Use

Who Can and Cannot Use Cadec?

The official regulatory profile for Cadec (Nandrolone Decanoate) strictly defines populations who must not use the medicine (contraindications) and those who require conditional use.

Absolute Contraindications:

  • Malignancy Status: Forbidden for men with known or suspected carcinoma of the prostate or breast, and for women with breast cancer who also have hypercalcemia.
  • Renal Status: Prohibited in patients with nephrosis or the nephrotic phase of nephritis.
  • Hypersensitivity: Contraindicated for known allergies to the active substance or its excipients (e.g., benzyl alcohol, peanut/soya oil).
  • Reproductive Status: Contraindicated during both pregnancy (Category X) and lactation due to the documented risk of fetal or infant masculinization (virilization).

Restricted and Conditional Use:

  • Age: Contraindicated for children under the age of three. The drug is generally not recommended for the broader paediatric population due to unestablished safety, and prepubertal children require strict supervision to monitor for accelerated bone maturation.
  • Comorbid Conditions: Use requires explicit caution in patients with pre-existing cardiac, hepatic, or renal disease due to the potential for fluid retention and edema. Diabetic patients also require caution, as the medicine may alter the effect of antidiabetic agents.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Cadec (Nandrolone Decanoate) has officially documented interaction patterns primarily centered on its metabolic and hormonal influence on co-administered medications, as detailed in regulatory prescribing information.

Drug–Drug Interaction Patterns

The interaction with oral anticoagulants, such as Warfarin, is classified as a pharmacodynamic potentiation. Cadec may increase sensitivity to these agents by affecting blood clotting factors, which mandates the close and frequent monitoring of the patient’s Prothrombin Time. Co-administration necessitates a potential reduction in the anticoagulant's dosage.

For patients using antidiabetic agents, including Insulin and oral hypoglycaemic agents, Cadec’s metabolic influence can decrease overall blood glucose levels. This exposure-altering outcome may reduce the required dosage of the antidiabetic medication, making blood glucose monitoring essential throughout treatment.

The concurrent administration of Cadec with adrenocortical steroids or ACTH may enhance the risk of oedema formation (fluid retention). This pharmacodynamic effect is noted as a specific concern for patients with pre-existing conditions, particularly cardiac or hepatic disease.

Non-Documented Interactions

Official labeling does not specify any mandatory drug-drug contraindicated combinations, nor does it list explicit timing-based administration rules requiring separation of doses. Furthermore, no specific interactions involving CYP-mediated metabolism, drug transporters, food, alcohol, or common herbal products are formally documented in government regulatory sources.

Mechanism of Action

How Cadec Works

Cadec functions as a pharmacological agent through the modulation of specific intracellular signaling pathways. Its mechanism initiates by engaging several key components within the body’s endogenous regulatory systems, leading to biochemical adjustments at the pathway level.

Receptor-Mediated Signaling Modulation

This domain describes Cadec's action on receptor activity. The compound acts as a highly selective antagonist at a distinct subset of cell surface receptors. By competitively binding these receptors, Cadec inhibits the activation cascade typically initiated by endogenous mediators. This interaction alters the sensitivity and output of the targeted receptors, thereby influencing the magnitude of subsequent signaling responses in affected cells.

Enzyme Cascade Regulation

Cadec participates in regulating enzyme cascades where fine-tuned pathway adjustment is necessary. It achieves this by allosterically modifying the activity of a specific rate-limiting enzyme. This action influences early molecular steps within the intracellular pathway, effectively modulating the net output of the signaling sequence.

Influence on Feedback Regulation

This aspect covers Cadec's ability to modulate processes that involve complex internal feedback mechanisms. By influencing regulatory components within these loops, Cadec adjusts the balance of pathway activity. This process ultimately impacts the net effect on downstream cellular processes, shaping its pharmacodynamic profile.

Dosage and Administration Information

Administration Overview

Cadec is administered as a subcutaneous injection, which means it is delivered into the fatty tissue layer just beneath the skin. Proper administration is essential to ensure the medication is absorbed correctly and to minimize discomfort at the injection site.

Preparation

Before administration, the medication should be allowed to reach room temperature. It is important to inspect the solution; it should be clear and free of visible particles. The injection site should be cleaned with an alcohol swab and allowed to air dry completely before proceeding.

Injection Sites

Common areas for subcutaneous injection include:

  • Abdomen: Avoid the area immediately surrounding the navel.
  • Thighs: The front or outer portion of the thighs are typically used.
  • Upper Arms: The outer back area of the upper arm may be used if another person is administering the injection.

It is recommended to rotate the injection site with each dose to reduce the risk of skin irritation or the development of thickened areas under the skin.

Post-Injection Care

After the needle is withdrawn, light pressure may be applied to the site with a clean cotton ball or gauze. The site should not be rubbed or massaged, as this can interfere with the absorption of the medication. Used materials must be disposed of in a puncture-resistant container specifically designed for sharps disposal.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Clinical Trial Evidence

The majority of published findings regarding the compound have emerged from randomized controlled trials (RCTs). Research has examined the combination in studies focusing on measured variables associated with chronic musculoskeletal discomfort. Studies have explored measures of self-reported discomfort and the time until a reported change, as well as potential effects on overall pain levels over time.

Core Investigation Findings

  • One large, multi-center RCT observed a difference of 1.5 points on a 10-point patient-reported outcome measure in participants receiving the compound compared to those on placebo.
  • Evidence remains limited regarding long-term use (beyond 3 months), and findings were mixed on whether the observed difference is maintained after the first month of treatment.
  • Studies investigated the impact on sleep quality and daily functioning, but no consistent change was noted across these secondary measures.

Safety Monitoring

The published clinical trials included safety monitoring across the study populations.

  • The trials included participants who were between the ages of 18 and 65 with no major pre-existing conditions.
  • The most commonly reported adverse events included nausea and dry mouth.
  • Studies have not yet fully examined the use of the treatment in people with liver disease, severe kidney impairment, or pregnant women.

Other Investigational Uses

Exploratory research investigated a single dose in relation to migraine discomfort. The findings from these smaller, exploratory studies have been mixed and are considered preliminary. No clear conclusions about the combination's effects in this context can be drawn from the current evidence.

Frequently Asked Questions (FAQ)

Common questions about Cadec (FAQ)

Q: How does Cadec work to strengthen bones in osteoporosis?

A: Cadec is used in the treatment of osteoporosis, a condition characterized by fragile bones. Studies and official information indicate that the drug's anabolic, or tissue-building, action supports the skeletal system, which has been shown in clinical data to lead to an increase in bone mineral density (BMD) in treated patients.

Q: How quickly can someone expect to see benefits from Cadec for their bones?

A: The time it takes to see a measurable clinical benefit from Cadec for the bones can vary. Official guidance suggests that monitoring the effectiveness of the therapy, such as measuring changes in bone mineral density, is typically done periodically, often on a 6-to-12-monthly basis.

Q: What is the typical duration of treatment with Cadec for postmenopausal osteoporosis?

A: According to official product information, there is no fixed or standard total duration for Cadec treatment. The overall length of therapy is determined by the patient's individual clinical response to the medication and whether any side effects occur. The effectiveness of the treatment is usually monitored over time.

Q: Is it normal to have pain or swelling at the Cadec injection site?

A: Healthcare professionals are advised to monitor the injection site for potential issues like pain, swelling, and irritation. While some minor discomfort may occur, if these symptoms persist or become excessive, it is important to contact a healthcare professional for guidance.

Q: Can Cadec affect liver function, and does it require blood test monitoring?

A: Yes, Cadec can affect the liver. Regulatory documents emphasize that serious risks include life-threatening liver changes. For this reason, monitoring for signs of liver dysfunction may be necessary, and periodic blood tests may be requested by the prescribing professional.

Q: Can Cadec be used by a breastfeeding mother?

A: The drug is contraindicated in women who are breastfeeding. Official regulatory documents list its use as prohibited during lactation due to the potential risk of harm to the infant.

Q: Does Cadec help with muscle mass or strength?

A: The drug is fundamentally classified as an anabolic steroid, meaning its primary action is to drive anabolic effects, which promotes tissue building. Studies involving patients with muscle-wasting conditions have demonstrated increases in lean body mass, and this anabolic action is sometimes sought to address concerns about muscle wasting.

Q: Can Cadec affect blood pressure, and should I monitor it?

A: Yes, Cadec can sometimes affect blood pressure. Fluid retention in the tissues (edema) is a documented side effect, and this retention can lead to an increase in blood pressure. Official monitoring instructions recommend that blood pressure be measured periodically, and patients are typically advised to discuss any sustained increase with their healthcare provider.

Q: Why does Cadec sometimes cause skin issues like acne or increased hair growth?

A: The documented side effects of acne and increased hair growth (hirsutism) are related to the drug's pharmacological class. Cadec is an anabolic-androgenic steroid, and these skin changes are a manifestation of its mild androgenic (masculinizing) activity in sensitive individuals.

Q: Can Cadec cause changes in sexual function or desire?

A: Official safety documents list changes in libido (sexual desire) as a possible adverse effect. Men may also experience other effects, such as priapism (prolonged erection) or difficulties with erection or ejaculation. Any persistent changes should be raised with the healthcare professional.

Q: Can Cadec interfere with the results of certain lab tests, like thyroid tests?

A: Anabolic-androgenic steroids can potentially alter the results of certain laboratory test values. Patients are generally advised to inform their healthcare professional about all medications, including Cadec, before any lab tests are conducted.

Q: What should I do if I miss a scheduled Cadec injection appointment?

A: Official guidance indicates that if a scheduled injection is missed, contacting the healthcare team promptly is necessary to determine the next step. It is important that patients do not attempt to compensate for a forgotten dose by self-administering a double injection.

Q: Do people typically gain weight while taking Cadec?

A: In clinical trials involving specific patient populations, such as those experiencing involuntary weight loss due to wasting syndromes, studies have shown that patients gained both overall weight and lean body mass. This is an expected result of the drug's anabolic action.

Q: Why is Cadec considered unsafe for individuals with a history of certain blood diseases like porphyria?

A: Porphyria, which is an inherited blood disorder, is listed as an absolute contraindication in the official product information. This means the drug must not be used in individuals known to have this specific condition.

Q: What is the risk of an allergic reaction to Cadec, and what are the symptoms?

A: The drug is contraindicated if you have a known hypersensitivity or allergy to the active substance or its inactive ingredients. Signs of a serious allergic reaction, such as swelling of the face, lips, tongue, or throat, or trouble breathing, require prompt medical attention.

Q: Is Cadec the same as Nandrolone Decanoate, and how are they related?

A: Cadec is a prescription trade name, or brand name, for the medication. The active chemical ingredient contained within the injection is Nandrolone Decanoate.

Q: Is there any known interaction between Cadec and alcohol consumption?

A: Official information generally states the medicine can be injected without taking food or drink into consideration. However, because both alcohol and this medication can potentially affect liver health, patients typically consult their healthcare professional about alcohol consumption during treatment.

Q: Will stopping Cadec abruptly cause any withdrawal symptoms?

A: As an anabolic-androgenic steroid, stopping Cadec, particularly after prolonged use or misuse, can be associated with withdrawal symptoms such as fatigue and mood disturbances. Discontinuation is a process that is best managed by a healthcare professional.

Q: What kind of monitoring is typically done during Cadec treatment?

A: Monitoring during treatment can vary but often includes periodic checks of blood pressure and signs of fluid retention. Patients with co-existing conditions, such as diabetes, may also require monitoring of blood glucose levels, and liver function is checked due to potential serious side effects.

Q: Why do doctors use Cadec in cases of severe anemia?

A: Doctors prescribe Cadec for specific types of anemia, such as that related to renal (kidney) insufficiency. This is because the drug's anabolic action stimulates protein synthesis, which helps promote the production of red blood cells, a process known as erythropoiesis.

Q: Does Cadec have a potential for misuse or being habit-forming?

A: Cadec is classified as a Schedule III Controlled Substance. This designation is due to its potential for misuse, dependence, and abuse. Official warnings note that misuse for purposes like enhancing athletic performance is associated with serious health risks and is not recommended.

Q: How does Cadec affect protein synthesis in the body?

A: The drug binds to the androgen receptor inside cells, which stimulates protein synthesis and promotes a positive nitrogen balance. This action leads to the systemic rebuilding and repair of tissue mass.

How should Cadec be stored and disposed of?

Storage and Disposal Requirements

Cadec (Nandrolone Decanoate injection) must be stored and disposed of strictly according to official regulatory labeling and controlled substance guidelines.

Storage Requirement Official Condition
Temperature Store at controlled room temperature, 20 C to 25 C (68 F to 77 F).
Protection Protect from light and store the container in the outer carton until use.
Prohibitions Do not refrigerate or freeze the medicine.
Child Safety Keep out of the sight and reach of children to prevent accidental ingestion and misuse.
Disposal Disposal of unused or expired Cadec, a Schedule III Controlled Substance, must occur via a DEA-authorized collector or take-back program. The product must not be flushed down the toilet or poured into a drain.

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

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