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  1. #1
    flexshack is offline Member
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    half lives section doesn't really list half lives

    why doesn't the half lives section under steroid resources tell what the half lives are for different roids? this would be extremely helpful to know. maybe i missed it though. i do have a question though. the steroid detection times are NOT the same as the whole life span or half lives of the roids, right? because if they were, then anavar would not have a detection time of 3 weeks when i believe its half life is about 6 hours or so (not positive on that). thanks
    flex

  2. #2
    chicamahomico's Avatar
    chicamahomico is offline Respected Member
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    I dug up this explanation and simple example, hope it helps:

    Half-life is the time it takes for the concentration of a drug in your system to drop by 50%.

    Here's a simple example. Suppose you have a concentration of 100mg/l (100 milligrams of drug per liter of blood) at say 1 PM, and the drug has a half-life of 2 hours. If you had blood drawn and tested every 2 hrs it would look like this:

    1PM 100 mg/l
    3PM 50 mg/l
    5PM 25 mg/l
    7PM 12.5 mg/l

    Notice that in the first 2 hours, between 1PM and 3PM, your body got rid of 50mg/l of the drug.

    But then in the same amount of time, the 2 hours between 3PM and 5PM, your body only got rid of 25 mg/l.

    But in all cases, your body gets rid of half of the however much of the drug is there in the 2 hour interval. That is why it is said to have a 2-hour half-life.

    The explanation for this is that the rate at which you body breaks down drugs (well, those with linear pharmacokinetics, anyway) is relative to the concentration of the drug in your system, not an absolute rate of elimination. (It get’s rid of 50% per 2 hours, not a fixed amount per 2 hours)

    This is really significant because drugs with short half-lives will wear off quickly. This could be a good thing, like a sleeping pill that doesn't make you groggy the next day. But it could be bad if your symptoms break thru.

    Also, if the half-life is short and you want to keep the concentrations in your system steady, you have to take the drug every half-life.

    So if you want steady concentrations of a drug with a 24-hour half-life, you can take it once a day. If you want steady concentrations of a drug with an 8 hr half-life, you need to take it 3 times a day.

    The problem with drugs with really long half-lives is that the build up in your system and can get to really high concentrations, even if you are only taking them once per day.

    Prozac can still be in your system 6 weeks after you take the last dose.

  3. #3
    flexshack is offline Member
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    Quote Originally Posted by chicamahomico
    I dug up this explanation and simple example, hope it helps:

    Half-life is the time it takes for the concentration of a drug in your system to drop by 50%.

    Here's a simple example. Suppose you have a concentration of 100mg/l (100 milligrams of drug per liter of blood) at say 1 PM, and the drug has a half-life of 2 hours. If you had blood drawn and tested every 2 hrs it would look like this:

    1PM 100 mg/l
    3PM 50 mg/l
    5PM 25 mg/l
    7PM 12.5 mg/l

    Notice that in the first 2 hours, between 1PM and 3PM, your body got rid of 50mg/l of the drug.

    But then in the same amount of time, the 2 hours between 3PM and 5PM, your body only got rid of 25 mg/l.

    But in all cases, your body gets rid of half of the however much of the drug is there in the 2 hour interval. That is why it is said to have a 2-hour half-life.

    The explanation for this is that the rate at which you body breaks down drugs (well, those with linear pharmacokinetics, anyway) is relative to the concentration of the drug in your system, not an absolute rate of elimination. (It get’s rid of 50% per 2 hours, not a fixed amount per 2 hours)

    This is really significant because drugs with short half-lives will wear off quickly. This could be a good thing, like a sleeping pill that doesn't make you groggy the next day. But it could be bad if your symptoms break thru.

    Also, if the half-life is short and you want to keep the concentrations in your system steady, you have to take the drug every half-life.

    So if you want steady concentrations of a drug with a 24-hour half-life, you can take it once a day. If you want steady concentrations of a drug with an 8 hr half-life, you need to take it 3 times a day.

    The problem with drugs with really long half-lives is that the build up in your system and can get to really high concentrations, even if you are only taking them once per day.

    Prozac can still be in your system 6 weeks after you take the last dose.
    thanks man but i already understand what half lives are. i want to know what some half lives are for different roids. and also what is the difference between detection times and half lives? thanks anyway though.

  4. #4
    Bigun's Avatar
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    You must understand that from the time it takes for 50% of the compound to be broken down there is a lot longer for the second 50% to be fully broken down. Drug tests test for metabolities of the drug not always the drug itself so your better allowing for a little longer.

    this may help also

    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) 15 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

    *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

    Drug Active half-life
    Formate 1.5 days
    Acetate 3 days
    Propionate 4.5 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

    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.

  5. #5
    FinaZurp's Avatar
    FinaZurp is offline Associate Member
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    Good info....

  6. #6
    flexshack is offline Member
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    Quote Originally Posted by Bigun
    You must understand that from the time it takes for 50% of the compound to be broken down there is a lot longer for the second 50% to be fully broken down. Drug tests test for metabolities of the drug not always the drug itself so your better allowing for a little longer.

    this may help also

    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) 15 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

    *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

    Drug Active half-life
    Formate 1.5 days
    Acetate 3 days
    Propionate 4.5 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

    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.


    thank you thank you thank you. finally someone answers my questions. this is just what i was looking for. thank you again. as a matter of fact, i think this stuff should be posted on the main page under the steroid resources section because i have never been able to find this info. before.
    flex

  7. #7
    D3m3nt3d's Avatar
    D3m3nt3d is offline AR's Whore D'Oeuvre
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    Quote Originally Posted by flexshack
    thanks man but i already understand what half lives are. i want to know what some half lives are for different roids. and also what is the difference between detection times and half lives? thanks anyway though.
    Half lives being how long you are at your peak levels after taking the steroid

    Detection time being how long it is traceable in your system period

  8. #8
    Bigun's Avatar
    Bigun is offline Senior Member
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    No problemo!

  9. #9
    ross3814 is offline Member
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    jay.. you got a PM

  10. #10
    PTbyJason's Avatar
    PTbyJason is offline Retired Admin
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    Quote Originally Posted by Bigun
    You must understand that from the time it takes for 50% of the compound to be broken down there is a lot longer for the second 50% to be fully broken down. Drug tests test for metabolities of the drug not always the drug itself so your better allowing for a little longer.

    this may help also

    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) 15 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

    *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

    Drug Active half-life
    Formate 1.5 days
    Acetate 3 days
    Propionate 4.5 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

    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.
    If you will allow me, I will put this on the main page this week.

  11. #11
    Bigun's Avatar
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    I dont know about the other guys, but I dont mind, you are in charge! LOL!

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