Observaciones clínicas y evidencias científicas - Los usos de algunas drogas en Chile se encuentran silenciados en los discursos oficiales, por lo que resulta importante llevar a cabo un ejercicio de observación clínica sobre la forma de aparición de algunos que requieren atención y que no son visualizados como prioridad en salud mental.
In the city of São Paulo, the culture of crack use has undergone considerable changes over these 11 years since it was first described. The sociodemographic profile of the users is practically the same and most use is still compulsive, with significant physical, moral and social impairment among them. Sole use of crack has overwhelmingly been replaced by associations between crack and other drugs, thus characterizing users in the city of São Paulo as multiple drug users.
An ethnographic study of women and drug use in inner city neighborhoods in Kingston, Jamaica, revealed that cannabis is commonly used in conjunction with crack cocaine to minimize the undesirable effects of crack pipe smoking, specifically paranoia and weight loss.