Addiction is a psychological and behavioral syndrome with a high desire to use drugs and reuse it after stopping (
1) and is considered as a physical, mental, social and spiritual illness (
2). Available statistics show high rates of drug use. The number of drug users worldwide reaches 190 million people and the number of addicts in Iran reaches two million people with a mean age of 18 years (
3). The overall trend shows an increase in the number of addicts over the past 40 years (
4). Therefore, the growth rate of drug abuse was three times more than the population growth rate over the past 20 years in Iran (
5).
According to the above statistics, prevention and rehabilitation programs were designed and implemented for drug addiction but the addicts’ population remained high, especially in people who stopped their use. Addiction relapse is one of the important issues in addiction recovery (
6). Some experts reported that nearly 90% of all the treated addicts experienced relapse within one year after discharge (
7). Thus, efforts are vital to identify the factors affecting relapse.
As noted above, addiction is a disease in which the biological, psychological, and social factors are playing major roles (
8), but social factors and determinants have more basic roles in the incidence, prevalence and persistence of addiction (
9). One of the social determinants is family factors especially the family’s expressed emotions. Expressed emotion indicates the family emotional status that reflects the quality of relationship between the patient and his family members (
10). Family emotional environment against the disease is very important and quality of family emotional atmosphere affects the disease recovery and treatment (
11). Effects of family expressed emotion on illness were previously shown on schizophrenia patients. Apart from schizophrenia, there were studies which showed that the expressed emotion is associated with mood and eating disorders (
11), personality disorders (
12), bipolar disorder (
13), anxiety disorders, and also with substance abuse (
14).
The lack of proper communication with the family members (single individuals) and lack of understanding and maltreatment of husband, wife, and children (married individuals) was found as an important factor in addiction relapse (
3) but the change of family expressed emotion and its impact on addiction received little attention. Social support is another determinant that affects addiction. Social support is defined as social resources that non-professionals provide for the supported person in the formal context of support groups or in informal helping relationships (
15).
The role of perceived social support in the prevention and treatment of drug abuse and relapse is shown in various studies. In this regard, the studies by Spoth and Redmond (
16) and Blume et al. (
17) suggest that the existence of supportive structures and networks, as well as supportive interventions such as spiritual and familial support have major role in promotion of treatment goals in drug abusers and prevention of relapse. Available social support affects the line of addiction and recurrence in addict people (
18). Perceived social support acts as a shield against the recurrence and relapse by increasing the psychological health (
19). Richardson (
20) found that the presence of family members in the social network of addicts in order to prolong drug abstinence is effective one year after the detoxification. Davis and Jason (
21) also concluded that there was a positive relationship between drug abstinence duration and receiving social support. Clients' perceptions regarding social support, improves their psychosocial functioning during the treatment process (
22). Other studies also showed that during the early stages of treatment, the support of other people has important role in addiction treatment (
23,
24). The results of the study by Hashemi et al. revealed that the people who did not relapse had better condition with respect to social support than those who did (
9). In contrast, some studies (
25) showed that social support cannot always predict the improvement stages. Considering the high and increasing prevalence of addiction and relapse, and gaps in the existing research on the role of expressed emotion and perceived social support on drug abuse relapse, the current study tried to answer: whether family expressed emotion and addicts perceived social support has the ability to predict relapse?