Oxilofrine is currently a WADA prohibited substance when used in competition. It is an ingredient found in some dietary supplements.
In 2009, Brazilian/American cyclist Flávia Oliveira was suspended for 2 years after taking a supplement known as "HyperDrive 3.0+" which contained methylsynephrine, a chemical equivalent of Oxilofrine, among other substances.  Her sentence was eventually reduced to 18 months after an appeal as there was enough evidence that she had unknowingly consumed said substance as the old label did not list methylsynephrine.
On July 14, 2013, Jamaican runners Asafa Powell and Sherone Simpson tested positive for Oxilofrine prior to the 2013 World Athletics Championships.  Powell, however, maintained that he did not take any banned supplements knowingly or willfully. Powell voluntarily withdrew as a result of the test. On 10 April 2014, both athletes received an 18-month suspension from competing, which was set to expire in December that year. However, after appealing to the Court of Arbitration for Sport (CAS), both athletes' suspensions were lifted on 14 July 2014.
On July 16, 2015, Boston Red Sox pitching prospect Michael Kopech was suspended without pay for 50 games after testing positive for Oxilofrine, which is a banned substance under the Minor League Drug Prevention and Treatment Program. Kopech denied knowingly taking the substance.
^Fourcroy, Jean L. (2008). Pharmacology, doping and sports: a scientific guide for athletes, coaches, physicians, scientists and administrators. Taylor & Francis. ISBN 978-0-415-42845-3.|access-date= requires |url= (help)
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