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.
Boldenone undecylenate should be administered every 5-7 days. It is usually used style frond-load, if used in constant doses its effects are felt only after a few weeks, style frond-load use; perceivable effects can be achieved a little earlier. The effect stays in the body for 3 to 4 weeks. The most important thing is not to forget the fact that it is necessary to take boldenone for period of 8-16 weeks.
For beginners, a sufficient amount is in the range of 300-500 mg weekly. Intermediate users achieve great gains and progress allowances in the range of 500-700 mg per week, without any need to use doses higher than 500 mg per week, especially when combined with other anabolic steroids. Experienced users normally don't use very high doses, as to the anabolic steroid, such as Boldenone, but the dosages of advanced users are in the range of 700 - 1000 mg per week. Material balances are held in the body 4-6 months.