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If the modified molecule is itself not active, needing to be converted back to the parent drug, then this is a prodrug. pictures of women on steroids, steroid abuse photos, steroid creams, side effects of steroid use, muscle and fitness magazine, women bodybuilding, bodybuilding suppliments, bodybuilding pics, anabolic steroid cycles, female bodybuilding, anabolic steroids for sale, anabolic steroid profiles, steroid discussion boards, teen bodybuilding photo gallery, dianabol steroids, statistics on steroids, npc bodybuilding, the history of steroids, anabolic discussion boards, bodybuilding steroid pics, controversial on steroids, effects of anabolic steroids, steroids for sale Lutalyse anabolic steroid use. Anabolic steroids such as testosterone cypionate and nandrolone decanoate are prodrugs. Since esters of anabolic steroids are so often used in bodybuilding, in this article we will examine them closely. At a particular position (#17) all anabolic steroids have a hydroxy group, consisting of an oxygen and hydrogen, represented by OH. pictures of women on steroids, steroid abuse photos, steroid creams, side effects of steroid use, muscle and fitness magazine, women bodybuilding, bodybuilding suppliments, bodybuilding pics, anabolic steroid cycles, female bodybuilding, anabolic steroids for sale, anabolic steroid profiles, steroid discussion boards, teen bodybuilding photo gallery, dianabol steroids, statistics on steroids, npc bodybuilding, the history of steroids, anabolic discussion boards, bodybuilding steroid pics, controversial on steroids, effects of anabolic steroids, steroids for sale Steroid creams. This can be replaced by an ester group: for example, propionate (OOCCH2CH3). This results in improvement in solubility in oil and reduction of water solubility, both of which are useful for reasons later to be discussed. How do esters differ in structure?While quite an array of names exist and make the issue seem complicated, the main difference between different esters is simply the number of carbon atoms in the ester. pictures of women on steroids, steroid abuse photos, steroid creams, side effects of steroid use, muscle and fitness magazine, women bodybuilding, bodybuilding suppliments, bodybuilding pics, anabolic steroid cycles, female bodybuilding, anabolic steroids for sale, anabolic steroid profiles, steroid discussion boards, teen bodybuilding photo gallery, dianabol steroids, statistics on steroids, npc bodybuilding, the history of steroids, anabolic discussion boards, bodybuilding steroid pics, controversial on steroids, effects of anabolic steroids, steroids for sale Statistics on steroids. Propionate, as shown above, has three carbons, whereas acetate has two, isobutyrate has four, enanthate has seven, cypionate has eight, and decanoate has ten. On occasion there are more unusual esters, such as cyclohexylmethylcarbonate (used in Parabolan) which has eight carbons and one more oxygen than the above esters do. How do esters change the physical properties of steroids?Testosterone, nandrolone, and other anabolic steroids have poor solubility in either water or oil. Esterifying them improves oil solubility. This enables useful dosages of perhaps 100 mg or more per cc. But the more carbons the ester has, the lower the water solubility becomes, and the higher the partition coefficient (ratio between lipid and water solubilities) becomes. If the partition coefficient is high, then at any moment a high proportion of the prodrug is dissolved in oil or body fat, and only a small proportion is dissolved in water. This is important. If testosterone itself is given in oil solution, it transfers too easily from oil to the water in the blood. The result is that an oil injection of testosterone gives a sudden spike in testosterone levels, which rapidly drops. Injections would be required at least twice per day, and perhaps even more often. Improving the oil solubility and decreasing the water solubility slows this transfer, and extends the half-life of the drug to several days or more. The number of carbons also has a small effect in that it reduces the parent drug's proportion of the total weight. E. g. , it would take 344 mg of testosterone propionate, or 401 mg of testosterone enanthate to give the same amount of testosterone as in 288 mg of testosterone suspension. How are esters converted back to the parent drug?The ester bond is fairly easily broken under the right conditions. If the molecule is dissolved in water, this can occur by a simple chemical reaction, yielding the parent drug and a carboxylic acid.
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