[Drug use and treatment misuse: Key points on polydrug use]

Distinct effects of cocaine and cocaine + cannabis on neurocognitive functioning and abstinence: A six-month follow-up study

BACKGROUND AND AIMS

Cannabis use is frequent among individuals with cocaine use disorder. Despite recent non-controlled studies advocating a therapeutic role of smoked cannabis, there is a paucity of evidence-based data on potential therapeutic and cognitive side-effects of this association.

METHODS

We examined 63 cocaine-addicted subjects who used cannabis more than 50 times in lifetime (COC + CAN), 24 cocaine-addicted patients who use cannabis less than 50 times (COC), and 36 controls (CON). Participants were evaluated with an extensive battery of neurocognitive tests after two weeks of supervised detoxification in an inpatient treatment program. Patients were followed up in one, three, and six months after discharge.

RESULTS

Both groups of patients performed worse than CON on working memory, processing speed, inhibitory control, mental flexibility, and decision making. COC + CAN performed worse than COC on speed processing, inhibitory control and sustained attention, while COC performed worse than COC + CAN on mental flexibility. Concomitant cannabis use did not decrease relapses to cocaine use after one, three and six months. Among COC + CAN, earlier cocaine and cannabis use, and impaired executive functioning were predictive of relapse on cocaine after six months.

CONCLUSION

Our results did not support the recommendation of smoked cannabis as a safe therapeutic approach for cocaine-addicted patients due to significant negative cognitive side-effects and absence of efficacy. Further studies investigating frontal brain morphology, neuromaturation, and prescription of the non-psychoactive constituent of cannabis sativa cannabidiol among cocaine-addicted patients who use cannabis are warranted.

Long-term health outcomes of childhood sexual abuse and peer sexual contact among an urban sample of behaviourally bisexual Latino men

While previous research indicates high rates of childhood sexual abuse among Latino men who have sex with men, few studies have examined the long-term health outcomes of childhood sexual abuse specifically among behaviourally bisexual Latino men. In a sample of 148 behaviourally bisexual Latino men in New York City, we examined associations between childhood sexual abuse and multiple dimensions of adult health: sexual risk behaviours; sexually transmitted infections incidence; polydrug use; depressive symptoms; and perceived stress. We compared outcomes between those with histories of childhood sexual abuse, those reporting peer sexual contact prior to age 13 and those with no sexual contact prior to age 13. Over one-fifth (22.3%) reported a history of childhood sexual abuse, which was significantly associated with engaging in receptive condomless anal intercourse (aOR = 3.59, p < .01, SE = 2.0), high perceived stress (aOR = 2.48, p < .06, SE = 1.13) and clinically significant depressive symptoms (aOR = 2.7, p < .05, SE = 1.25). Across all variables, peer sexual contact did not impact these outcomes, underscoring a key distinction between abusive and non-abusive early sexual experiences. We recommend that sexual abuse prevention policies and programmes better engage Latino youth, and that practitioners serving this population across diverse areas of practice incorporate childhood sexual abuse screening and culturally appropriate treatment and care into practice.