Oral steroids have an effect upon the body much more quickly than their injectable counterparts, however the active duration is much shorter as a result of their short half-lives and so the drug has to be taken on a more regular bases [17-19]. The half-life of a drug is defined as:“…the amount of time during which the blood level of it [the drug] is reduced to one-half of its original blood concentration” . The short half-lives of oral steroids results in the detection time of the steroid being relatively short. In contrast, injectable steroids have a much greater half-life than oral steroids as the drug is stored in the fat deposits in the body. This makes them more stable than oral steroids and easier to maintain but this consequently means that their detection times are much greater . The difference in the half-lives and detection times of oral and injectable steroids is highlighted in Table 2 .