Table 1.

Maternal and infant demographics.

Subject	Age (years)	Weight (kg)	Daily methadone dose (mg)	Infant age at test (days)
1	26	52	75	5 (27*)
2	23	48	75	4 (18*)
3	18	54	90	7
4	27	83	75	8
5	33	52	40	1
6	25	75	90	7
7	26	49	105	11
8	23	64	90	5

^*Second study (mature milk).