Olympic Winter Games:
Grenoble 1968: none
Sapporo 1972: 1 case of ephedrine in ice hockey
Innsbruck 1976: 2 cases: 1 of ephedrine in Nordic skiing, 1 of codeine in ice hockey
Lake Placid 1980: none
Sarajevo 1984: 1 case of methandienone in Nordic skiing
Calgary 1988: 1 case of testosterone in ice hockey
Albertville 1992: none
Lillehammer 1994:  none
 
Games of the Olympiad:
Mexico 1968: 1 case of alcohol in modern pentathlon
Munich 1972: 7 cases: 2 of amphetamines in weightlifting and judo, 2 of coramine in cycling, 3 of ephedrine in basketball, swimming and weightlifting
Montreal 1976: 11 cases: 1 of amphetamines in shooting, 1 of fencamfamine in weightlifting, 1 of phenylpropanolmine in yachting and 8 of anabolic steroids (1 in athletics and 7 in weightlifting)
Moscow 1980: none
Los Angeles 1984:  12 cases: 1 of ephedrine in volleyball, 7 of nandrolone (5 in weightlifting and 2 in athletics), 2 of metenolone in volleyball and wrestling, 2 of testosterone in volleyball and athletics
Seoul 1988: 10 cases: 1 of caffeine in modern pentathlon, 4 of furosemide (2 in weightlifting, 1 in wrestling and 1 in judo), 1 of propanolol in modern pentathlon, 1 of pemoline in weightlifting, 3 of stanozolol (1 in athletics and 2 in weightlifting). Four medallists were found guilty of doping and the IOC stripped them of their medals: three Olympic champions (Ben JOHNSON, CAN - 100 m, athletics; Mitko GRUBLER and Angel GUENCHEV, BUL - weightlifting) and a bronze medallist (Kerrith BROWN, GBR - judo).
Barcelona 1992: 5 cases: 1 of strychnine in volleyball, 1 of norephedrine in athletics, 2 of clenbuterol in athletics and 1 of mesocarb in athletics.
Atlanta 1996: 1 case of methandienone and 1 case of stanozolol.
 
Number of tests performed at the Olympic Games since 1968
1968 Grenoble
Mexico City
86
667
1972 Sapporo
Munich
211
2079
1976 Innsbruck
Montreal
390
786
1980 Lake Placid
Moscow
440
645
1984 Sarajevo
Los Angeles
424
1507
1988 Calgary
Seoul

492
1598

1992 Albertville
Barcelona
522
1848
1994 Lillehammer 529
1996 Atlanta 1923