Testosterone can be administered parenterally , but it has more irregular prolonged absorption time and greater activity in muscle in enanthate , undecanoate , or cypionate ester form. These derivatives are hydrolyzed to release free testosterone at the site of injection; absorption rate (and thus injection schedule) varies among different esters, but medical injections are normally done anywhere between semi-weekly to once every 12 weeks. A more frequent schedule may be desirable in order to maintain a more constant level of hormone in the system.  Injectable steroids are typically administered into the muscle, not into the vein, to avoid sudden changes in the amount of the drug in the bloodstream. In addition, because estered testosterone is dissolved in oil, intravenous injection has the potential to cause a dangerous embolism (clot) in the bloodstream.
While 8 weeks will be our minimal time frame, 12 weeks is far more efficient, with 16 weeks being the gold standard. Absolutely, you can run cycles that extend past the 16 week mark, but the only ones who will typically have a need for this will be advanced competitive bodybuilders . In any case, for the sake of your health you will need to plan off-cycle periods. You need to allow time periods where there is not a high influx of hormones so as to allow your body to normalize and relieve it from stress. Failure to do this can really mess with your natural hormone production, and in many cases lead to you lifelong hormone therapy needs.
Last thing, where do I get Arimidex and why not just get it from my Doctor? The last question is easy—it’s very expensive to get Arimidex from a doctor. The first question is also easy. I won’t directly link it, but there are tons of sites out there that sell “research chemicals” which is basically just a loophole in the law that allows companies to sell unscheduled but prescription-only drugs (like Arimidex, and, incidentally, Viagra) over the Internet. Do a search for “RUI Arimidex.” But there are tons of these sites out there, just check on the bodybuilding boards if you choose to go with another vendor. Most of them are legit businesses, not “steroids over the Internet.”
It’s no secret there exist a strong anti-steroidal population and as this “anti” feeling is often so emotionally based it can produce some laughable claims. If you’ve been around the performance enhancing game for any length of time you’re familiar with all the names and acronyms so this will probably make you laugh. Yes, there are a few street names for steroids such as juice or roids but those are some very generic terms and really don’t point to anything specific. We went to a handful of the anti-steroid websites so desperate to paint anabolic hormones in a bad light and they have made up their own street names for steroids that are quite humorous and they include “Pumpers, Gym Candy, Arnolds, Stackers, Balls and Bulls, A’s, Weight Trainers.” “Weight Trainers” are you serious, Arnolds? If that didn’t make you laugh a little then you don’t have a sense of humor but the sad truth is these websites are real and many of them are funded by your government.