NPP 150

Nandrolone Phenylpropionate Injection

Product Name & Packaging

Brand Name: NPP 150
Generic Name: Nandrolone Phenylpropionate
Strength & Packaging: 150 mg/mL | 10 mL multidose vial (assuming “10NL” was intended to mean 10 mL)

Nandrolone phenylpropionate is the phenylpropionate ester of nandrolone, a synthetic anabolic-androgenic steroid with androgen receptor activity.

Description

NPP 150 is a concentrated injectable nandrolone ester formulation designed as a depot preparation. Reference pharmacology sources classify nandrolone as an androgen receptor agonist with anabolic properties, while PubChem identifies nandrolone phenylpropionate as an anabolic/androgenic nandrolone ester.

Indications

There is no standardized current FDA-approved indication identifiable for this exact brand-specific 150 mg/mL presentation. The IUPHAR/BPS Guide to Pharmacology notes that the first FDA nandrolone-based approval was for nandrolone phenylpropionate in 1959, and that multiple nandrolone formulations were later approved and subsequently discontinued. For catalog purposes, this product is best described as a manufacturer-specific nandrolone injectable preparation whose use should be determined only by a licensed prescriber and local regulatory status.

Dosage & Administration

Because this is a brand-specific injectable strength without a current standardized label readily available, a universal dosage recommendation should not be listed in a medical-reference entry. A suitable professional wording is:

“Administer only under the direction of a licensed healthcare professional and in accordance with the manufacturer’s labeling, applicable regulations, and patient-specific clinical judgment.”

Injectable nandrolone products are administered as depot injections, typically by the intramuscular route, and parenteral products should be visually inspected before use.

Mechanism of Action

Nandrolone phenylpropionate acts through androgen receptor signaling and has associated anabolic properties. As an esterified form of nandrolone, it functions as a depot preparation that releases active nandrolone after administration. PubChem notes that nandrolone binds to the androgen receptor, and IUPHAR classifies it as an approved drug class with androgen receptor agonist activity.

Precautions

Use requires careful professional oversight. Class warnings for injectable nandrolone products include risk of virilization, pregnancy-related fetal masculinization, edema, lipid abnormalities, and caution in patients with cardiac, renal, or hepatic disease. Anabolic steroids may also accelerate bone maturation in children and are not considered safe or effective for enhancement of athletic performance.

Side Effects

Reported adverse effects associated with nandrolone injectable therapy include acne, voice deepening, hirsutism, menstrual irregularities, gynecomastia, edema, libido changes, nausea, vomiting, insomnia, and mood changes. Long-term androgenic anabolic steroid exposure has also been associated with hepatic complications and adverse lipid changes.

Storage

For nandrolone injectable reference products, a common labeled storage standard is 20° to 25°C (68° to 77°F) with protection from light. Store the finished product according to the specific manufacturer’s label and inspect the solution before administration.