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Among 31 male and 17 female former addicts in methadone maintenance or drug-free treatment, the frequency of sexual behaviors was determined by questionnaires administered at least weekly over several weeks. Daily methadone dose (mg/kg) correlated significantly with frequency of genital contacts (r = -.54) and organs (-.43) among females, and with frequency of ejaculation (-.31) among males. Although open and nonblind, the study suggests that higher doses of methadone may suppress human sexual behavior.
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Crowley et al. (1978) studied this question.
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