**Nandrolone (4‑Androstene‑17β‑ol‑3-one)** is an anabolic–androgenic steroid (AAS) that has been used clinically for a variety of therapeutic indications, including the treatment of anemia and cachexia. While it possesses legitimate medical applications, its misuse as a performance‑enhancing agent remains a significant public‑health concern.
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## 1. Medical Uses
| Indication | Typical Dosage | Duration | |------------|----------------|----------| | **Anemia** (especially in patients with chronic kidney disease) | 5 mg / day orally or IV | Variable; often weeks to months | | **Cachexia & Muscle Wasting** (e.g., in cancer, AIDS) | 20–50 mg / day intramuscularly | 4–12 weeks (tapered thereafter) | | **Hypogonadism** (in specific cases where testosterone is contraindicated) | 2.5–10 mg / day orally or IV | Variable; requires monitoring |
> **Note:** Dosing varies significantly depending on the underlying condition, patient age, renal/hepatic function, and concomitant medications.
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## 4. Contraindications & Precautions
| Category | Key Points | |----------|------------| | **Absolute contraindications** | • Severe uncontrolled hypertension • Known hypersensitivity to the drug or its excipients • Active infection at injection site (for intramuscular) | | **Relative contraindications** | • Renal impairment (eGFR <30 mL/min/1.73 m²) – dose adjustment • Hepatic dysfunction – monitor liver enzymes • Pregnancy & lactation – use only if benefits outweigh risks; limited human data • Active malignancy – risk of tumor growth | | **Drug interactions** | • Other immunomodulators (e.g., anti‑TNF agents) may have additive effects on infection risk • CYP3A4 inhibitors/inducers may affect metabolism (if applicable) • Anticoagulants: increased bleeding risk when combined with NSAIDs or steroids | | **Contraindications** | • Known hypersensitivity to the drug or any excipients • Active uncontrolled infections • Severe hepatic impairment (if metabolized hepatically) |
2. **Monitoring Schedule (typical)** | Time | Action | |------|--------| | Baseline | CBC, CMP, LFTs, viral screen | | 4–6 wks | CBC & CMP to detect early cytopenia/hepatic toxicity | | Every 3–6 months | CBC, CMP; assess disease activity | | At flare or dose change | Repeat labs as needed |
3. **Adverse Event Management** - **Cytopenias**: Reduce dose, hold drug, treat infection. - **Infections**: Discontinue drug if severe; consider prophylaxis. - **Hepatotoxicity**: Monitor LFTs closely; discontinue if ALT/AST >5× ULN. - **Gastrointestinal**: Provide supportive care; adjust dose.
4. **Vaccination and Infection Prevention** - Update influenza, pneumococcal vaccines before initiating biologic therapy. - Counsel patients on avoiding live vaccines during treatment.
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## 6. Summary of Key Points
| Issue | Recommendation | |-------|----------------| | **Initial Screening** | CBC, CMP, viral serology (HBV/HCV/HTLV), TB test (IGRA). | | **Baseline Monitoring** | CBC & CMP at baseline; LFTs at baseline and monthly for first 3–6 months. | | **During Therapy** | CBC & CMP every 1–2 months; LFTs every 4–6 weeks until stable, then every 3–6 months. | | **Dose Adjustment** | If AST/ALT > 5× ULN → hold drug; if < 5× ULN but ≥ 3× ULN → consider dose reduction or temporary interruption. | | **Stopping Rules** | Persistent elevation > 5× ULN after 2–3 doses, or any transaminase rise with symptoms (jaundice, pruritus). | | **Special Populations** | Higher baseline liver enzyme levels in women; monitor more closely and consider dose reduction earlier. |
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## Practical Recommendations
1. **Baseline** – Obtain ALT/AST, ALP, GGT, bilirubin, albumin, PT/INR. 2. **Follow‑up Frequency** - Women: every 4–6 weeks for the first 3 months; thereafter every 12 weeks or sooner if symptoms arise. - Men: similar schedule but can be slightly extended to 8–10 weeks after initial stabilization. 3. **Adjustments** – If ALT/AST > 2× ULN, pause therapy and re‑evaluate in 1–2 weeks; resume once levels normalize. 4. **Education** – Counsel patients on reporting jaundice, dark urine, or fatigue promptly.
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### Conclusion
By incorporating sex‑specific pharmacokinetic insights into a structured monitoring protocol—emphasizing more frequent laboratory checks early in therapy for women and adopting slightly longer intervals for men—the safety profile of this novel anti‑cancer drug can be optimized while maintaining therapeutic efficacy. Continuous assessment of emerging data on gender differences will further refine these recommendations.
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