The present invention provides a therapeutic agent for substance dependence, which prevents relapse/recurrence of compulsive substance-taking behavior based on craving for addictive substances such as stimulant substances, opioids, barbiturate type anesthetics, hallucinogens, cocaine, hemp, cannabis, alcohol, or volatile organic solvents. (−)-1-(Benzofuran-2-yl)-2-propylaminopentane or a pharmacologically acceptable acid addition salt thereof is useful as a therapeutic agent for substance dependence, which prevents relapse/recurrence of compulsive substance-taking behavior associated with craving for addictive substances.
