outro especificado psychoactive substance dependência is a transtorno of regulation of uso of a specified substance arising from repeated or continuous uso of the specified substance. The characteristic feature is a strong internal drive to uso the specified substance, which is manifested by impaired ability to control uso, increasing priority given to uso over other activities and persistence of uso despite harm or negative consequences. These experiences are often accompanied by a subjective sensation of urge or craving to uso the specified substance. Physiological features of dependência may also be present, including tolerance to the effects of the specified substance, abstinência symptoms following cessation or reduction in uso of the specified substance, or repeated uso of the specified substance or pharmacologically similar substances to prevent or alleviate abstinência symptoms. The features of dependência are usually evident over a period of at least 12 months but the diagnosis may be made if uso of the specified substance is continuous (daily or almost daily) for at least 3 months.