Anabolic / 19-Nor

Nandrolone Decanoate (Deca-Durabolin)

Classic 19-nor anabolic. Significant joint lubrication (collagen synthesis). High progestogenic activity. Medically used for muscle wasting and anaemia. Very long clearance — detected 18+ months in drug testing. Controlled substance.

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Educational reference only. This page does not diagnose, prescribe, or replace care from a licensed professional. Laws, availability, and clinical appropriateness vary by location.

Reference dose200–400 mg/week IM (performance); 50–100 mg/week (therapeutic)

Half-life336 hours

Risk flaghigh

Regulatory noteResearch-only flag

Side effects and watch-outs

⚠️ 'Deca Dick' — erectile dysfunction from prolactin/progesterone elevation
⚠️ Prolactin elevation requires cabergoline management
Severe and prolonged HPTA suppression
LDL↑↑ HDL↓↓
Haematocrit elevation
Acne/oily skin
Hair loss
Water retention
⚠️ Virilisation in women — voice changes and clitoral enlargement can be PERMANENT
18+ month clearance time for drug testing
Requires extended PCT with HCG + SERM