What is the half-life of Nandrolone Phenylpropionate?

Nandrolone Phenylpropionate has an approximate elimination half-life of 2.7 d. Levels carry over between doses — every 2–3 days is typical.

How long does Nandrolone Phenylpropionate stay in your system?

Roughly 97% of a dose has cleared after five half-lives — about ~14 days for Nandrolone Phenylpropionate. That is the window that matters for washouts, bloodwork and surgery.

How is Nandrolone Phenylpropionate taken?

Nandrolone Phenylpropionate is typically administered by the intramuscular route. Literature range: ~100 mg intramuscular every other day, alongside testosterone.

What are the risks of Nandrolone Phenylpropionate?

Frequent injections (every other day) Same prolactin/sexual side effects and heavy suppression as Deca Controlled substance; run with a testosterone base and plan a PCT

Nandrolone Phenylpropionate

NPP — short-ester nandrolone. Same compound as Deca, faster on and off.

Half-life: 2.7 d
Out of system: ~14 days
Route: Intramuscular
Level: Advanced

Levels carry over between doses — every 2–3 days is typical. After the last dose, roughly 97% has cleared in ~14 days (five half-lives) — the window that matters for washouts, bloodwork and surgery.

What Nandrolone Phenylpropionate is used for

Same nandrolone profile as Deca with a short ester
Faster to clear, easier to adjust or stop

How it's typically used

Literature range: ~100 mg intramuscular every other day, alongside testosterone.

What to watch for

Frequent injections (every other day)
Same prolactin/sexual side effects and heavy suppression as Deca
Controlled substance; run with a testosterone base and plan a PCT

Common questions

What is the half-life of Nandrolone Phenylpropionate?: Nandrolone Phenylpropionate has an approximate elimination half-life of 2.7 d. Levels carry over between doses — every 2–3 days is typical.
How long does Nandrolone Phenylpropionate stay in your system?: Roughly 97% of a dose has cleared after five half-lives — about ~14 days for Nandrolone Phenylpropionate. That is the window that matters for washouts, bloodwork and surgery.
How is Nandrolone Phenylpropionate taken?: Nandrolone Phenylpropionate is typically administered by the intramuscular route. Literature range: ~100 mg intramuscular every other day, alongside testosterone.
What are the risks of Nandrolone Phenylpropionate?: Frequent injections (every other day) Same prolactin/sexual side effects and heavy suppression as Deca Controlled substance; run with a testosterone base and plan a PCT

About Androgens & steroids

What they are: Anabolic-androgenic steroids — testosterone and its derivatives. These are drugs, not peptides, and are controlled substances in most countries.
How they're run: Injected intramuscularly or subcutaneously on a schedule set by the ester's half-life; a few are oral and hepatotoxic.
What to watch: Every one of these shuts down your own testosterone production. Full bloodwork before, during, and after is not optional, and an exit plan — PCT or ongoing replacement — is part of the decision to start, not an afterthought.

Full guide

Nandrolone Phenylpropionate: A Tracking Guide for the Short-Ester Nandrolone

NPP is nandrolone on a faster ester. Same compound, same risks, more frequent injections. What to track.

Other androgens & steroids

Peptid AI is an educational and self-tracking tool — not a medical service, and not a vendor. Nothing here is medical advice, a prescription, or an endorsement. Doses reflect what is commonly reported in research literature; they are not recommendations. Many compounds listed are experimental, not approved for human use, and/or controlled substances that are illegal to possess without a prescription in many countries. Always consult a qualified physician before starting, changing, or stopping any protocol.