Steroid Half Life's

- May 04, 2018-

Steroid Half Life's


       Steroid Half life's - anyone new to steroids may be wondering what this means, even some steroid users may also be wondering what this means. So here in simple terms you can read and hopefully understand all about steroid half life's and what this term means. 

Basically every drug has a half life, steroids included. If for example, you were to inject 200mg of Decadurabolin once weekly, for 6 weeks, how would you know when you were "off"? Would you be "off" when you had finished your last dose? You would be able to calculate this from the half life of Deca. The half life of Deca is around 14 days. This means that 14 days from your last shot of 200mg of Deca, your blood levels of Deca will contain 100mg of the steroid. Another 14 days from then, i.e. 28 days from last dose, your blood levels will contain 50mg of the steroid. This amount then keeps halving every 14 days. Therefore you can clearly see that when you finish your cycle, even though you are not putting any steroids into your body, you may think that you are now "off", however you still have, and will still have for some time after your last dose, "active" blood levels of the steroid. Therefore you can plan what to use, how long for, and how long off your cycle, based on these half life's.


Below a list of half-life's of the most commonly used steroids, esters and ancillary compounds.


Oral steroids Drug Active half-life 

Anadrol / Anapolan50 (oxymetholone) 8 to 9 hours 

Anavar (oxandrolone) 9 hours 

Dianabol (methandrostenolone, methandienone) 4.5 to 6 hours 

Methyltestosterone 4 days 

Winstrol (stanozolol)

(tablets or depot taken orally) 9 hours 


Depot steroids Drug Active half-life 

Deca-durabolin (Nandrolone decanate) 14 days 

Equipoise 14 days 

Finaject (trenbolone acetate) 3 days 

Primobolan (methenolone enanthate) 10.5 days 

Sustanon or Omnadren 15 to 18 days 

Testosterone Cypionate 12 days 

Testosterone Enanthate 10.5 days 

Testosterone Propionate 4.5 days 

Testosterone Suspension 1 day 

Winstrol (stanozolol) 1 day 


Steroid esters Drug Active half-life 

Formate 1.5 days 

Acetate 3 days 

Propionate 2 days 

Phenylpropionate 4.5 days 

Butyrate 6 days 

Valerate 7.5 days 

Hexanoate 9 days 

Caproate 9 days 

Isocaproate 9 days 

Heptanoate 10.5 days 

Enanthate 10.5 days 

Octanoate 12 days 

Cypionate 12 days 

Nonanoate 13.5 days 

Decanoate 15 days 

Undecanoate 16.5 days 


Ancillaries Drug Active half-life 

Arimidex 3 days 

Clenbuterol 1.5 days 

Clomid 5 days 

Cytadren 6 hours 

Ephedrine 6 hours 

T3 10 hours 

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