This paper examines the correlates of problem gambling among a populat
ion of 220 methadone patients receiving treatment in the New York metr
opolitan area. Like most methadone patients, respondents were primaril
y adult males, ethnically mixed, of limited educational accomplishment
and had long experiences with intravenous drug use. More than two-thi
rds of subjects had been convicted of one or more criminal offences. A
nalysis of the data showed seven percent of respondents to be probable
pathological gamblers according to the South Oaks Gambling Screen (SO
GS), indicating a high rate of gambling problems among this treatment
population. Consistent with past studies, problem gamblers are more li
kely to be men, with histories of alcohol abuse, and with extensive cr
iminal participation dating back to their teenage years. The data also
suggested that problem gamblers who were also drug dependent were mor
e likely to show greater evidence of social dysfunctionality compared
to those who were exclusively substance abusers. More dually addicted
respondents reported higher levels of recent heroin use, greater unemp
loyment, and more reported hallucinations. Probable pathological gambl
ers who were substance abusers were also more likely to report being i
n conflict with their close friends. A multiple regression analysis su
ggested this to be the closest linked correlate to being a pathologica
l gambler. Evidently, pathological gamblers create antipathy towards t
hemselves as their compulsion to gamble is expressed; this in turn, ma
y drive them toward further gambling, as they respond to this perceive
d opposition. These last preliminary findings will require further con
firmation in future research.