Nandrolone Phenylpropionate (NPP)

### Nandrolone Phenylpropionate

Nandrolone Phenylpropionate (NPP) is an androgen and anabolic steroid (AAS) medication primarily used in the treatment of advanced breast cancer in women and as an adjunct therapy for the treatment of senile or postmenopausal osteoporosis in women[1]. Here are some key points about NPP based on the provided information:

1. **Medical Uses**
– Used in the treatment of advanced breast cancer in women.
– Used as an adjunct therapy for the treatment of senile or postmenopausal osteoporosis in women.

2. **Available Forms**
– NPP is or has been available in 25 mg/mL and 50 mg/mL formulations in oil[1].

3. **Side Effects**
– Side effects of NPP include symptoms of masculinization like acne, increased hair growth, voice changes, and increased sexual desire[1].
– It has strong anabolic effects and weak androgenic effects, making it especially suitable for use in women and children[1].

4. **History and Availability**
– NPP was first described in 1957 and was introduced for medical use in 1959[1].
– It was widely used in the past but has mostly been discontinued and is now scarcely available[1].

5. **Performance-Enhancing Use**
– NPP is used for physique- and performance-enhancing purposes by competitive athletes, bodybuilders, and powerlifters due to its high ratio of anabolic to androgenic effect and its weak propensity for androgenic and estrogenic side effects[1].

6. **Dosage Information**
– The dosages for NPP are not necessarily equivalent to other anabolic steroids and should be determined by a healthcare provider[1].

7. **Chemical and Physical Data**
– Formula: C27H34O3
– Molar mass: 406.566 g·mol−1

8. **Chemical Structure and Synonyms**
– Chemical formula: C27H34O3
– Synonyms: Nandrolone phenpropionate, NPP, Nandrolone phenylpropionate, and others[3].

Considering the potential serious side effects and the need for medical supervision, it’s important to consult a healthcare provider before using Nandrolone Phenylpropionate for any purpose[2].