From: Morphine plasmatic concentration in a pregnant mare and its foal after long term epidural administration
Days
Morphine
M3G
M6G
36
5.88
213.87
7.59
19.89
307.85
12.96
8.25
278.57
10.36
6.16
241.21
8.48
42
63.18
149.26
9.45
49
1.66
93.01
3.08
50
4.82
125.20
5.79
51
57.82
2.23