Cocaine-induced Psychosis and Brain-derived Neurothrophic Factor in Patients with Cocaine Dependence: Report of Two Cases

Brain-derived neurotrophic factor (BDNF) is linked to numerous brain functions. In addition, BDNF alterations contribute to neurological, mental, and addictive disorders. Cocaine dependence has received much attention recently due to its prevalence and psychological effects. Symptoms of psychosis are one of the most serious adverse events precipitated by cocaine use. It is particularly important to identify patients at risk of developing cocaine-induced psychosis (CIP). We described two cases of patients with cocaine dependence who presented with CIP and had changes in their BDNF levels during the psychotic episode. BDNF levels were initially low in both patients, and then decreased by more than 50% in association with CIP. The relationship between BDNF and psychosis is described in the literature. These cases revealed that BDNF levels decreased during a CIP episode and, thus, it is necessary to investigate BDNF and its relationship with CIP further.

Self-perceived quality of life in cocaine dependents with or without dual diagnosis / Calidad de vida autopercibida en pacientes dependientes de cocaína con o sin diagnóstico de patología dual

INTRODUCTION: Although impairment in the quality of life is common among cocaine dependent patients, there are but a few researches about the interaction between addiction and quality of life. OBJECTIVE: To study different parameters of quality of life in a sample of cocaine dependent patients and to compare patients with or without dual diagnosis. Also, to promote the importance of subjectivity in the quality of life and to propose to incorporate patients' self-perception into their treatment. METHOD: Three diagnostic interviews were administered (SCID-I, SCID-II and PRISM) and a quality of life questionnaire (SF-36) was applied between two different patient groups: Group I (cocaine dependent patients) and Group II (cocaine dependent patients with other mental disorder). RESULTS: Patients diagnosed with dual disorders (Group II) showed broader differences in perceptions of their quality of life in comparison with their clinicians. The perception of quality of life may vary depending on the presence and severity of mental disorders, and these different appreciations may explain the difficulties that clinicians face in understanding their patients' expectations and motivations. DISCUSSION AND CONCLUSION: A systematic evaluation of the subjective quality of life should be included in the management of cocaine dependent patients in order to more accurately understand the patients' perception of their treatment, motivations and expectations.

INTRODUCCIÓN: La calidad de vida de los pacientes dependientes a la cocaína se encuentra alterada y hay poca información acerca de cómo interactúa la dependencia a sustancias y la calidad de vida. OBJETIVO: Estudiar los diferentes parámetros de calidad de vida en pacientes dependientes a la cocaína con o sin diagnóstico de patología dual. Asimismo, señalar la importancia de la subjetividad en la calidad de vida y proponer la incorporación de la autopercepción de los pacientes en su tratamiento. MÉTODO: Se realizaron tres entrevistas diagnósticas (SCID-I, SCID-II y PRISM) y un cuestionario de calidad de vida (SF-36) entre dos grupos diferentes de pacientes: Grupo I (pacientes con dependencia a la cocaína solamente) y Grupo II (pacientes dependiente a la cocaína con otro trastorno mental). RESULTADOS: Los pacientes diagnosticados con patología dual (Grupo II) mostraban amplias diferencias en la percepción de la calidad de vida comparada con la percepción de sus terapeutas. La percepción de la calidad de vida podría variar dependiendo de la presencia y gravedad de los trastornos mentales asociados. Además, estas diferentes apreciaciones podrían explicar las dificultades que tiene el clínico para entender las expectativas y motivaciones del paciente de cara a su tratamiento. DISCUSIÓN Y CONCLUSIÓN: En pacientes dependientes a la cocaína debería realizarse de forma sistemática una evaluación de la calidad de vida subjetiva con el fin de conocer con mayor precisión la percepción que tienen los pacientes de su tratamiento, así como sus motivaciones y expectativas.

Role of personality traits in cocaine craving throughout an outpatient psychosocial treatment program

Objective: Cocaine dependence is a major international public health concern. Its chronically relapsing nature is possibly related to craving intensity, which can be influenced by diverse biological and psychological aspects. This study aimed to evaluate the role of different personality traits in craving measured throughout a psychosocial treatment program. Method: The sample comprised 66 cocaine-dependent outpatients who were enrolled in an individual and manualized cognitive-behavioral therapy program. The influence of personality traits on craving intensity, frequency, and duration was analyzed using a generalized estimating equations model with an autoregressive correlation structure. Results: Craving varied during treatment. The personality traits of novelty seeking, reward dependence, and harm avoidance interacted with craving intensity, and the personality trait of persistence interacted with craving duration throughout the treatment period. Furthermore, there were significant interactions between drug use and craving intensity, and between different routes of administration and craving intensity. Participants who used cocaine/crack while in treatment and concurrent users of crack (i.e., freebase) cocaine and powder cocaine also had a higher craving intensity. Conclusion: The extent of craving variation can depend on certain personality styles. This study shows that craving is influenced by personality traits, and this may presumably change clinical expression involved in disease. .

Validation of a cocaine craving questionnaire (CCQ-G) in Mexican population / Cuestionario del craving (apetencia) de cocaína (CCQ-G) en población mexicana

This study aimed for the validation of the General Cocaine Craving Questionnaire (CCQ-G) in Mexican population. To achieve this, the scale was applied by interviewing 233 cocaine users, of which 214 met inclusion criteria for the final analysis. This study's inclusion criterion was: not having a psychotic episode and/or manic or depressive or cognitive damage that could impede adequate test solving. The sample consisted entirely of male participants, aged between 18 and 59 years (M = 27, SD = 9.2). All participants met DSM-IV-TR criteria for substance abuse and dependence. 83% of the sample were polydrug users, but reported cocaine as their main drug of use. 74.8% of the sample reported previously having attended treatment for cocaine dependence. At the time of the study, all of the sample was under residential treatment between their 4th and 12th week and was distributed in 5 different institutions whose treatment model is grounded in the philosophy of Alcoholics Anonymous. After factor analysis was performed, the model was adjusted to three factors. Factor 1 referred to intention to use cocaine, factor 2 expressed desire for cocaine consumption, and factor 3 referred to positive expectancies for cocaine consumption. The instrument showed good internal consistency with an α=.87.

El presente estudio tuvo como objetivo validar en la población mexicana la escala Cocaine Craving Questionnaire General (CCQ-G). Para conseguir tal objetivo, se entrevistó y aplicó la escala a una N = 233 consumidores de cocaína que decidieron participar voluntariamente en el estudio. Los criterios para ingresar al estudio fueron los siguientes: no sufrir un episodio psicótico, maniaco, depresivo o daño cognitivo que impidiera resolver adecuadamente la escala. La muestra estuvo constituida por participantes masculinos, que reunían los criterios del DSM-IV-TR para abuso y dependencia a sustancias, con edades comprendidas entre 18 y 59 años (M=27, SD=9.2). En el momento de las entrevistas estaban bajo tratamiento residencial entre la cuarta y duodécima semanas en cinco diferentes instituciones cuyo tratamiento se basa en el modelo de Alcohólicos Anónimos. El análisis factorial que se realizó señaló que el modelo se ajustaba a tres factores. El Factor 1 hacía referencia a la intención de uso de cocaína; el Factor 2 expresaba deseos de consumo de cocaína; el Factor 3 hacía referencia a las expectativas positivas del consumo de cocaína. El instrumento también mostró una adecuada consistencia interna con un α=.87.