Trade Names: Deca, Deca-Durabolin, Nandrolone Phenylpropionate

Chemical Names: Nandrolone

Routes: Intramuscular Injection
Half-life: NPP 3 days / Decanoate 10-15 Days

Nandrolone Decanoate 300mg by Swisschem Pharma is a high-concentration injectable anabolic steroid. Commonly known by its original brand name, Deca-Durabolin, this compound is one of the most widely used steroids for promoting significant muscle mass, strength, and overall physical recovery.

Below is the proper description and clinical profile of this specific formulation.

Product Specifications

• Brand: Swisschem Pharma
• Active Ingredient: Nandrolone Decanoate
• Concentration: 300 mg/mL
• Format: Typically a 10 mL multi-dose vial
• Carrier: Pharmaceutical-grade oil solution for intramuscular injection

Core Characteristics & Benefits

• Slow-Acting Ester: The Decanoate ester provides a very slow release of the hormone into the system. After injection, it creates a sharp spike in levels followed by a steady release that can last for up to two to three weeks.
• Massive Nitrogen Retention: It is exceptionally potent at increasing nitrogen retention in the muscles. A positive nitrogen balance is the primary requirement for significant muscle growth and repair.
• Enhanced Collagen Synthesis: It is highly regarded for its therapeutic effect on joints. By improving collagen synthesis and bone mineral content, it provides significant relief for joint pain and helps prevent injury during heavy lifting.
• Red Blood Cell Production: It stimulates the bone marrow to increase red blood cell production, which improves oxygen delivery to the muscles and enhances endurance.

Administration and Half-Life

• Active Half-Life: Approximately 12 to 15 days.
• Injection Frequency: Because of its long-acting nature, it does not require frequent injections. For stable blood levels, it is typically administered once per week.
• Common Dosage:
• Men: Usually 300–600 mg per week.
• Women: Generally not recommended due to its long half-life and risk of virilization, though very low doses (50 mg) are sometimes used medically.

Potential Side Effects

While Nandrolone is often considered "mild" regarding hair loss and skin issues, it has specific side effects to monitor:

• "Deca Dick": This refers to erectile dysfunction caused by the increase in prolactin. It is often managed by using a testosterone base alongside it.
• Water Retention: Unlike the faster Phenylpropionate version (NPP), the Decanoate ester can cause significant water retention and bloating, which is why it is primarily used during "bulking" phases.
• Severe HPTA Suppression: Nandrolone is extremely suppressive. Even a single dose can significantly shut down natural testosterone production, making Post-Cycle Therapy (PCT) mandatory.
• Cardiovascular Impact: It can negatively affect cholesterol levels and blood pressure if not monitored.

Storage and Safety

• Storage: Store at room temperature (15°C to 30°C). Protect from light. If the solution "crashes" (forms crystals) due to the high concentration, the vial can be gently warmed to re-dissolve the hormone.
• Medical Supervision: This is a potent hormonal agent. It should only be used under the direction of a qualified healthcare professional. Misuse can lead to permanent endocrine damage and cardiovascular complications.