Nandrolone Phenylpropionate (NPP) 100mg by Swisschem Pharma is a fast-acting injectable anabolic steroid. It is a derivative of the male hormone testosterone, engineered to provide high anabolic (muscle-building) effects with a reduced androgenic (masculinizing) profile.

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

Product Specifications

• Brand: Swisschem Pharma
• Active Ingredient: Nandrolone Phenylpropionate
• Concentration: 100 mg/mL
• Format: Typically a 10 mL multi-dose vial
• Carrier: Pharmaceutical-grade oil for intramuscular injection

Core Characteristics & Benefits

• Rapid Action: Unlike the longer-acting Nandrolone Decanoate, the Phenylpropionate ester allows for a quick release of the hormone into the system. It reaches peak blood levels shortly after injection.
• Lean Muscle Quality: NPP is highly regarded for building quality muscle. It promotes significant protein synthesis and nitrogen retention with much lower water retention compared to other nandrolones, resulting in a harder, more defined look.
• Joint and Tissue Support: It enhances collagen synthesis and improves bone mineral content. This provides a therapeutic benefit for athletes or patients suffering from joint pain or connective tissue stress.
• Metabolic Support: It is often used as a supportive adjunct in therapies requiring a positive nitrogen balance, such as recovery from severe trauma or chronic debilitating diseases.

Administration and Half-Life

• Half-Life: Approximately 2.5 to 3 days.
• Injection Frequency: To maintain stable physiological levels, injections must be administered frequently, typically every 2 to 3 days (or three times per week).
• Common Dosage:
• Men: Usually 200–400 mg per week.
• Women: Generally 25–50 mg per week to minimize the risk of virilization.

Side Effects & Risks

Despite its milder reputation compared to testosterone, NPP carries specific risks:

• Natural Testosterone Suppression: Even at low doses, it significantly shuts down the body's natural hormone production. A comprehensive Post-Cycle Therapy (PCT) is necessary.
• Progestogenic Activity: As a 19-nor steroid, it can increase prolactin levels. This may lead to side effects such as gynecomastia or sexual dysfunction (NPP Dick).
• Cardiovascular Impact: It can negatively affect cholesterol levels by reducing HDL (good cholesterol) and increasing LDL (bad cholesterol).
• Virilization: Women may experience deepening of the voice, increased body hair, and other male-pattern changes.

Storage and Safety

• Storage: Keep at room temperature (15°C to 30°C). Protect from light and do not refrigerate, as the hormone may crystallize.
• Medical Supervision: This is a powerful hormonal agent. Its use should only occur under the guidance of a qualified healthcare professional. Misuse can lead to permanent endocrine damage and cardiovascular complications.