Extended Abstract
Introduction: Any offense is affected by various factors, and in order to commit various forms of crimes such as social, family-related, personal, etc., one would be tempted to do abnormal acts. In this way, various factors facilitate the external and marginal factors of the occurrence of crime. Drugs and addiction as a factor exacerbates going through of these stages and the occurrence of crime, but the notion that the mere use of narcotic drugs alone leads to crime, is a judgment that is not warranted, and the person must be in other ways, including cultural, economic, educational, etc. preparedness to commit crimes, so that the narcotics and addiction resulting from it can also affect the crime and determine the crime.  Drugs and the resulting problems have become a national problem in many countries and a major international problem. The relationship between the drug abuse and the crimes caused by it is undeniable, and these crimes are divided into two categories: the first is the offenses that have a direct relationship with narcotics, such as the transportation and sale of narcotics, and the second category of offenses are the ones that have an indirect relationship with narcotics, such as theft and murder.  Our country, geographically and in the vicinity of the largest focal point for opiate production and transit routes, has continued to be affected by these conditions and has not been able to protect itself from its harmful effects. Therefore, the researcher has studied the relationship between drug addiction and crime.
Method: The research method was comparative in this study. The statistical population of this study consisted of two groups, 150 experimental groups consisted of 150 drug addicts who were in prison for committing a crime; the criterion for choosing these people was that while conducting the research they were already in prison, and the comparison group also included 150 drug addicts who had not committed any crimes, and the criterion for choosing these people was that they had a history of misdemeanors and a criminal conviction.  A questionnaire was used to collect the data. The content validity of the questionnaire was evaluated.  In order to evaluate the content validity, the extent to which the content of the instrument was measured as well as the purpose of the research were taken into account.  In order to evaluate the content validity in quantitative terms, two relative RMS content validity coefficients (CVR) and content validity index (CVI) were used, and their results were reported as optimal.  Cronbach’s alpha method was used to determine the reliability of the questionnaire. Its value was 0.82%, which indicated a desirable reliability of the questionnaire.  KS test was used for data normalization, and independent T-test and Chi-square correlation coefficients were used to analyze the data of the questionnaire and test the hypotheses.
Findings: The results of the study showed that there is a relationship between the type of drug used (industrial and traditional) and the crime as well as the type of crime. There is also a relationship between the sex of the criminal and the type of crime as well as the duration of the addiction and the history of crimes. According to the results of the research, there is a significant difference between criminal addicts and non-criminal addicts in terms of economic status, self-control, and differential association (socializing with criminals). In the sense that criminals are more economically weak, have less self-control, and they are more socially connected with the criminals’ friends and acquaintances.
Discussion: Since humanity became familiar with the ill-fated phenomenon of drugs and saw its traces in his life, he/she was also acquainted with drug-related crimes, and at the same time or after taking drugs, committed crimes.  Addiction is one of the things the colonists and oppressors use as a means of destroying nations and earning huge profits. It seems that the addicts often start to consume for the first time in order to entertain, or out of curiosity, and some other similar reasons. However,  after a while, he/she is so dependent on the substance that he constantly thinks of it, and the person is ready to commit a crime so as to reach the false enjoyment that, if he/she was not addicted, could never commit such a crime, which is very unfortunate indeed. The delinquent behavior of addiction is inevitable, and the criminal acts of drug addicts are related to other drug crimes such as smuggling, carrying, storing, etc.  Even in countries where the government has provided drug addicts with drugs, the criminal acts have not diminished.  The issue of drug-related crimes is one of the most complex challenges currently faced by Iranian society. Therefore, “the relationship between addiction and delinquency is a permanent, inevitable, and universal phenomenon “.  According to the results of this study, this criminal behavior does not merely have economic and material aspects, but it happens due to behavioral abnormalities.  It should be appreciated that, if a major step could be taken to reduce and ultimately to prevent drug trafficking, then the crimes related to these substances would be significantly reduced. Therefore, in co-operation with the Counter Narcotics and Related Organizations, measures can be taken to reduce the harms caused by addiction in the target group.  As the results of the study indicated, there is a relationship between the type of crime with the sex of the addicted person, and women are more likely to commit crimes. Relief Committee can assist in the provision of services to addicted people, especially women by allowances, etc. in order to reduce the harm.
 According to the results of the research, the most effective factors in committing crime are unemployment and poverty, in order to reduce this damage, this issue should be taken into account and  precise planning should be done, which requires national determination to work in society and eradicate poverty and unemployment.  
Moreover, findings of the research indicate that it is possible to identify and prioritize the type of crimes based on the sex of addicts and investigate the factors affecting the commission of criminal offense and present it to the relevant authorities, such as the Welfare Organization, the Counter Narcotics Committee, the Relief Committee, etc.  in order to provide suitable solutions  for the problem.
Ethical Considerations
Authors’ contributions
All authors contributed in producing of the research.
Funding 
In the present study, all expenses were borne by the authors, and they did not have any sponsors. 
Conflicts of interest
The authors declared no conflict of interest. 
Acknowledgments
In this article, all rights relating to references are cited and resources are carefully listed.