Injectable steroids are typically defined by the active steroidal hormone by which they are comprised as well as the ester that is attached. While a steroidal hormone may come in many forms, it is primarily the ester that is attached that distinguishes one particular form. The ester attached to the hormone does not change the hormones specific mode of action but does affect its activity. The smaller the ester the shorter its half-life, the larger the ester the longer its half-life; as such, shorter esters become effective sooner than larger but their total active duration is also less than larger esters. Further, smaller esters take up less mass in the total compound providing more active steroidal hormone per milligram.
Athletes and bodybuilders usually prefer steroid injections over the tablets. The health risk they pose is lesser. They do not have the chemical modifications of oral tablets. Instead, they possess esters which give them long-lasting effects. They do not have as many side effects as they don’t pass through the digestive system.
The degree to which an injectable steroid becomes immediately available to the target tissue upon administration is high. Its quick action apart, an injectable steroid offers minimal gastrointestinal effects and can be administered to individuals in altered states of consciousness.
Spectrum Pharma proposes such injectable steroids: