Description
Testocyl P® is a sterile oily solution containing testosterone propionate, an esterified form of testosterone. The propionate ester is attached to the 17β-hydroxyl group of the testosterone molecule and increases its lipophilic character for an oil-based injectable preparation.
The oily injectable form is suited to this short-chain testosterone ester for deep intramuscular administration. After injection, the oil phase forms a depot from which the esterified substance is released before enzymatic hydrolysis of the ester bond yields testosterone. Compared with longer-chain testosterone esters, the propionate ester gives the preparation a distinct ester profile within oil-based injectable formats.
Further details on composition, method of use, precautions, possible side effects, contraindications and storage are provided in the package leaflet.