Performane-enhancing drugs, aka PEDs, are a grouping of several classes of drugs which are known to enhance athletic performance and are therefore their use has been baned. This thesis explored the pharmacology of a handful of PEDs. Making use of various studies, case reports, and litterature reviews, we looked into the pharmacokinetics, pharmacodynamics, and adverse effects of various PEDs, as well as some other aspects of their use. Along with this, a brief history of PED use as well as ethical and legal aspects were discussed.