Oral steroids ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Active half-life
Anadrol / Anapolan50 (oxymetholone) ------------------------ 8 - 9 hours
Anavar (oxandrolone) --------------------------------------- 9 hours
Dianabol (methandrostenolone, methandienone) -------------- 4.5 - 6 hours
Methyltestosterone ----------------------------------------- 4 days
Winstrol (stanozolol) ---------------------------------------- 9 hours
(tablets or depot taken orally)
Depot steroids ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Active half-life
Deca-durabolin (Nandrolone decanate) ----------------------- 15 days
Equipoise --------------------------------------------------- 14 days
Finaject (trenbolone acetate) -------------------------------- 3 days
Primobolan (methenolone enanthate) ------------------------- 10.5 days
Sustanon or Omnadren -------------------------------------- 15 - 18 days
Testosterone Cypionate ------------------------------------- 12 days
Testosterone Enanthate ------------------------------------- 10.5 days
Testosterone Propionate ------------------------------------- 4.5 days
Testosterone Suspension ------------------------------------- 1 day
* Winstrol (stanozolol) --------------------------------------- 1 day
*Winstrol depot does not actually possess a classical half-life because it is un-esterified. Instead, the microcrystals dissolve slowly. Once they have all dissolved levels of the drug fall very rapidly. It is still an important consideration, and we have included it with a half-life of one day.
Steroid esters ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Active half-life
Formate ----------------------------------------------------- 1.5 days
Acetate ----------------------------------------------------- 3 days
Propionate --------------------------------------------------- 4.5 days
Phenylpropionate --------------------------------------------- 4.5 days
Butyrate ----------------------------------------------------- 6 days
Valerate ----------------------------------------------------- 7 days
Hexanoate --------------------------------------------------- 9 days
Caproate ---------------------------------------------------- 9 days
Isocaproate -------------------------------------------------- 9 days
Heptanoate -------------------------------------------------- 10 days
Enanthate --------------------------------------------------- 10.5 days
Octanoate --------------------------------------------------- 12 days
Cypionate ---------------------------------------------------- 12 days
Nonanoate ---------------------------------------------------- 13.5 days
Decanoate ---------------------------------------------------- 15days
Undecanoate -------------------------------------------------- 16.5 days
Ancillaries ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Active half-life
Arimidex -------------------------------------------------------- 3 days
Clenbuterol ----------------------------------------------------- 1.5 days
Clomid ---------------------------------------------------------- 5 days
Cytadren ------------------------------------------------------- 6 hours
Ephedrine ------------------------------------------------------- 6 hours
T3 ------------------------------------------------------------- 10 hours
A practical example is if one was to inject 100mg of testosterone propionate and allow blood levels to peak. In 4.5 days time (half-life duration from the above tables) and providing no other injections had taken place, the level would be reduced to 50mg. Again, a further 4.5 days down the line and levels would have dropped to 25mg, and the value keeps halving every 4.5 days.
