Table 4 Concentration (ng/ml) of plasma and urine caffeine of horses at T0 and T56

1

1.5

55,143

14.5

94,202

2

4.3

56,844

18.1

57,038

3

4.2

57,890

8.6

79,946

4

3.7

44,986

11.9

59,178

5

4.5

46,275

15.5

62,103

6

30.2

48,248

13.1

54,002

Mean

8.1^a*

51,564^b

13.6^a

67,744^b

St. Dev.

10.9

5,708

3.2

15,859