ID

Gender

Age
(Years)

Race

Daily methadone dose (mg)

Time at current methadone dose (days)

Highest 6βNTX Dose (mg)

GI Transit Testing

Lowest dose producing laxation (mg)

Would continue after highest dose

1

Female

27

African-American

70

14

1.0

Yes

0.05

Yes

2

Female

45

African-American

19

180

1.0

Yes

0.5

No

3

Female

44

Caucasian

40

90

1.0

No

NA

Yes

4

Male

46

African-American

40

30

0.5

Yes

0.5

Yes