[3] She was the original winner of the 100 m at the 2010 Commonwealth Games but was stripped of her title and banned after her doping test came back positive for the stimulant methylhexanamine.

She began to compete in senior competitions the following year as part of the Nigerian 4×100 metres relay team.

Osazuwa was replaced with Halimat Ismaila for the final team and they sprinted to a time of 43.04 seconds, taking third place and a bronze medal behind Russia and Belgium.

[10] She was selected to represent Africa at the 2010 IAAF Continental Cup and following a fifth place in the 200 m, she won a relay bronze medal in a team comprising the top four 100 m runners from the African Championships (Gabon's Ruddy Zang Milama and her compatriots Osazuwa and Okagbare).

[11] At the 2010 Commonwealth Games in New Delhi, Osayomi won the women's 100 metres but lost her gold medal after her B sample tested positive for methylhexanamine, which has only been recently added to the World Anti-Doping Agency's prohibited list.