[You're] Childish and Insecure
Ironic, no?[I'm] Done speaking with you for life.
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[You're] Childish and Insecure
Ironic, no?[I'm] Done speaking with you for life.
Nice straw man. But that's not what we're talking about, is it?Is it childish to end a futile argument???
I think it was beneficial. You got to vent and I got to respond. Now we can move on and move past it. We can talk about why nothing ever seems to register with BBC3. Why, if history repeats itself, you'll see him talking about how "half-life" is a misnomer in some other thread in a couple of weeks... in one ear, out the other.I am embarassed to have argued over a personal matter for so long, and to no benefit. My apologies to the board.
With intramuscular injections into oil depots, the rate limiting process is not clearance from the body, but absorption into the body. The body essentially eliminates the drug as fast as it's absorbed. Whereas longer esters have an absorption half life of several days to over a week, the clearance half life of the actual hormone is much, much shorter. When the ester is cleaved and the base hormone is released and enters into circulation, it's half life is usually a matter of hours, depending on serum binding. Since the absorption half life is so much longer, decline of the drug in the body corresponds to the absorption half life.
I am sorry, but you're mistaken, Despite what you think, what I said is entirely supported by several references. I started a new thread devoted to that. I wanted to 1) make it painfully obvious that what I said was correct and 2) encourage a response from you.I'm sorry but this is totally screwed up.
The first "metabolic conversion" is hydrolysis of the ester into the parent drug after it leaves the depot and enters the body. This is the absorption phase.If half-life of the first metabolic conversion is short, then that results in faster mass transfer.
Metabolism of the esterfied prodrug is not what I'm talking about. When I say clearance or elimination, I'm talking about metabolism and clearance of the parent drug, active testosterone.You were entirely incorrect to assert that metabolism was not the limiting step in the case of long-acting drugs.
Agreed.Rather the reason that long-chain (highly hydrophobic) steroid esters undergo slower metabolism is because of lower -- extremely low -- water solubility resulting in very slow rate of de-esterification.
The new thread I started, and the numerous references I provided, clearly demonstrates that this is the case. This is now the second debate we've had in which I've lost faith in your reasoning and knowledge.I thoroughly expect that you will be certain that I am wrong and you are of course right.
I fear I was only a pawn. A means to this end. Bill, you took the bait....
Before I Totally step back, and let "The Master" take you legs right out from under you, as you will so certainly put your head on this perverbial chopping block, I have one final.
I have already explained one of the misconceptions with drug half-lives as this can be confused with the the term, as it is used in nuclear chemistry, as half-life to that respect means the inception of an entirely new element in some cases. Where yes there are still similarities to general premise, they are different. An radioactive element of this nature may spend only 50 days at the first "half-life", and then spend 2000 days at the next one, and so on. I AM ONLY PROVING THE TERM IS DYNAMIC IN USAGE. But not only that, there would appear to be some dynamics the the actual usage for drug metabolism half-lifes, when you consider a drug like T cyp. To label TCYP as a "half-life" of 8 days for one, is relatively speculative at best, and dependant upon the principle of application. There would also appear to be at least (4) different stages of application depending on where the drug is currently in the human system, thus denoting extremely varied actions of metabolsm, with applicable variables we simply due not address to wind up at the end, as our means are not served by the "books" to which you hold so dear....
An even further confusion in the aspect of drug elimination half lives is the fact the many are not held in fat at all, and yet they have half lives. Thus I was highlighting the relevance of the ONLY TRUELY KNOWN HALF LIFE OF CYP AS BLOOD CIRCULATING. The rest is for any "body" to say. Take a drug like tylenol. I am guessing it is not fatty soluble at all. This could also be denoted by the fact that it dissolves in a glass of water. HOWEVER, it lasts in the system for an estended time due to its half life in relation to how quickly the liver can deal with it. So its half life is primarily determined solely by its ability to withstand the action of the liver. Some are removed by the kidneys (advil), and hence the same. WHile I am not totally accurate as you would like, the point is fairly made. SO AGAIN, TO ASSIGN TCYP A 'HALF-LIFE" is somewhat of a MISNOMER..... Ahhhh, you bring me so much pleasure............ I need a "smile" for SATISFACTION...
It is clear you have not learned the age old wisdom of never drawing lines in the sand. I will now DO YOU A FAVOR and offer you #2..... CHOOSE YOUR BATTLES WISELY....... So eager to stamp out common sense are we? So ready to take the work/word of others as singular gospel. It was not intended as such. You have only enslaved it in this manner. Without a brain to think, your toolbox is has less value that an erector set. And at least then, creativity is not only allowed, but encouraged... Perhaps I will have her get you one of those too.....
We must work on your balance young one. The ideals, theory, and literal foundation that your that your University propagated intellactual bubble provide you with, also serve to shield you from truth in general and real application. One day you may be ready to actually attempt to practive lesson #3, Tooting you own horn.... It is experience that I fear you lack. The final piece to your puzzle. You are not yet ready yound Padawon......
Thank you Bill for again interjecting. I realize as it was not so much in my defense, and clearly to further explain you lessons, I appreciate the support you offered.......
I was just reviewing this. In case there was any confusion, there were only TWO sentences directed at Bill, the first and the last. ]