All athletes who participate in the Olympic 100 m competition are subject to the World Anti-Doping Code –the IAAF and International Olympic Committee (IOC) are both signatories.
Mandatory in-competition drug testing was introduced at the 1968 Summer Olympics.

One of the most prominent cases of doping at the Olympics, and in sport as a whole, occurred during the 1988 Seoul Olympics.
Ben Johnson entered the race as the reigning 100 metres world record holder and won the Olympic final, raising his arm in victory, in a new world record of 9.79 seconds to much fanfare.
Soon after being awarded the gold medal the results of his post-race drug test revealed his urine contained traces of stanozolol (a banned steroid).
Johnson later admitted to doping, but he and his coach Charlie Francis still claimed he had his drink spiked at the Olympics, as Johnson was taking a different type of steroid at the time.
The positive test had long-lasting effects on public perception of the sport and advanced the case for more stringent drug testing.
The Canadian government launched an investigation into drugs in sport, known as the Dubin Inquiry, the following year.
The 1988 Olympic men's 100 metres final has been referred to as "the dirtiest race in history", as only two of the eight finalists remained free of doping issues during their careers.

Ekaterini Thanou, the 2000 women's silver medallist, was barred from the 2004 Athens Olympics after failing to attend a pre-competition drugs test (her third consecutive missed test).
The Greek sprinter and her teammate Kostas Kenteris were convicted of staging a motorcycle crash to avoid the test, but this was overturned on appeal.
Her doping ban remained as they admitted to having missed the tests.
Tameka Williams was banned from competing in the 100 m at the 2012 Olympics when, at the Olympic village, she admitted to the Saint Kitts and Nevis management team that she had ingesting a banned substance.
Bulgaria's Tezdzhan Naimova had her 2008 Olympic performance annulled and received a two-year ban after it was proved that she had tampered with her drug test a month prior to the competition.

Another high-profile doping case involved the 2000 Olympic women's 100 m champion Marion Jones, though no doping infractions occurred during the Olympics.
Having been one of the stars of the games—she won three gold and two bronze medals in track and field events—Jones was later implicated in doping through the BALCO scandal.
She lied to federal agents and a grand jury during questioning around the scandal, but later admitted in 2007 to using Tetrahydrogestrinone (THG) during the period of her Olympic success.
The IOC annulled all her Olympic results, including her 100 m title.
Given that the 2000 women's runner-up Ekaterini Thanou had herself been banned for drug usage, the IOC chose not to upgrade her to the gold medal position, but rather leave the position vacant.
Working around the dilemma, the IOC decided to raise bronze medallist Tayna Lawrence to joint silver and fourth-placed Merlene Ottey to the bronze medal position.

In spite of the relatively few occasions in which 100 m sprinters have failed doping tests at the Olympics, numerous Olympic sprinters have been banned outside the competition or implicated otherwise, including many medallists.
Two-time Olympic champion Carl Lewis had a positive drug test for stimulants at the US Olympic trials.
The United States Olympic Committee accepted his claim of inadvertent use, since a dietary supplement he ingested was found to contain "Ma huang", the Chinese name for Ephedra (ephedrine is known to help weight loss).
The 1992 Olympic champion Linford Christie was banned for nandrolone later in his career.
Angel Guillermo Heredia accused the 2000 Olympic champion Maurice Greene of doping; Greene denied this but admitted to paying for "stuff" for his training mates.
Justin Gatlin, the men's gold medallist in 2004, served a doping suspension both before and after his Olympic win, and returned to the podium at the 2012 Olympics.
The men's runner-up in 2012, Yohan Blake,
All athletes who participate in the Olympic 100 m competition are subject to the World Anti-Doping Code –the IAAF and International Olympic Committee (IOC) are both signatories. Mandatory in-competition drug testing was introduced at the 1968 Summer Olympics.
One of the most prominent cases of doping at the Olympics, and in sport as a whole, occurred during the 1988 Seoul Olympics. Ben Johnson entered the race as the reigning 100 metres world record holder and won the Olympic final, raising his arm in victory, in a new world record of 9.79 seconds to much fanfare. Soon after being awarded the gold medal the results of his post-race drug test revealed his urine contained traces of stanozolol (a banned steroid). Johnson later admitted to doping, but he and his coach Charlie Francis still claimed he had his drink spiked at the Olympics, as Johnson was taking a different type of steroid at the time. The positive test had long-lasting effects on public perception of the sport and advanced the case for more stringent drug testing. The Canadian government launched an investigation into drugs in sport, known as the Dubin Inquiry, the following year. The 1988 Olympic men's 100 metres final has been referred to as "the dirtiest race in history", as only two of the eight finalists remained free of doping issues during their careers.
Ekaterini Thanou, the 2000 women's silver medallist, was barred from the 2004 Athens Olympics after failing to attend a pre-competition drugs test (her third consecutive missed test). The Greek sprinter and her teammate Kostas Kenteris were convicted of staging a motorcycle crash to avoid the test, but this was overturned on appeal. Her doping ban remained as they admitted to having missed the tests. Tameka Williams was banned from competing in the 100 m at the 2012 Olympics when, at the Olympic village, she admitted to the Saint Kitts and Nevis management team that she had ingesting a banned substance. Bulgaria's Tezdzhan Naimova had her 2008 Olympic performance annulled and received a two-year ban after it was proved that she had tampered with her drug test a month prior to the competition.
Another high-profile doping case involved the 2000 Olympic women's 100 m champion Marion Jones, though no doping infractions occurred during the Olympics. Having been one of the stars of the games—she won three gold and two bronze medals in track and field events—Jones was later implicated in doping through the BALCO scandal. She lied to federal agents and a grand jury during questioning around the scandal, but later admitted in 2007 to using Tetrahydrogestrinone (THG) during the period of her Olympic success. The IOC annulled all her Olympic results, including her 100 m title. Given that the 2000 women's runner-up Ekaterini Thanou had herself been banned for drug usage, the IOC chose not to upgrade her to the gold medal position, but rather leave the position vacant. Working around the dilemma, the IOC decided to raise bronze medallist Tayna Lawrence to joint silver and fourth-placed Merlene Ottey to the bronze medal position.
In spite of the relatively few occasions in which 100 m sprinters have failed doping tests at the Olympics, numerous Olympic sprinters have been banned outside the competition or implicated otherwise, including many medallists. Two-time Olympic champion Carl Lewis had a positive drug test for stimulants at the US Olympic trials. The United States Olympic Committee accepted his claim of inadvertent use, since a dietary supplement he ingested was found to contain "Ma huang", the Chinese name for Ephedra (ephedrine is known to help weight loss). The 1992 Olympic champion Linford Christie was banned for nandrolone later in his career. Angel Guillermo Heredia accused the 2000 Olympic champion Maurice Greene of doping; Greene denied this but admitted to paying for "stuff" for his training mates. Justin Gatlin, the men's gold medallist in 2004, served a doping suspension both before and after his Olympic win, and returned to the podium at the 2012 Olympics. The men's runner-up in 2012, Yohan Blake,
100 metres at the Olympics