This Vitamin B-12 shot can be used at home as an injection, under instruction of a doctor. Before using this medicine, a health care professional will provide detailed instructions for appropriate use of this medicine. Ask any questions that you may have about this medicine or giving injections. Store this medicine as directed. If you miss a dose of this medicine, use it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not use 2 doses at once.
The partition coefficient of the ester in question is important because is effects how long the drug itself stays in the system. If the testosterone transfers too quickly from the oil to the blood, the result is a sudden spike in testosterone which then rapidly drops once the dose has been used up. In the example of free testosterone injected into the muscle from a water suspension (as in Aquiviron, mentioned above), the testosterone is essentially immediately available to the bloodstream due to its low partition coefficient, and thus there is an immediate spike of testosterone which is used up quickly in the body.