One of the most important factors which become a hindrance in the rehabilitation of an addicted person is relapse which can happen at any time and at any stage. The significance of the study is that there was no study conducted on the Uttarakhand population to know the causes or factor that affects substance abuse-related relapse.To study the causative factors affecting substance abuse-related relapse and find out the relationship between demographic characteristics and the cause of relapse.A descriptive study was conducted in the city of Haldwanidistrict Nainital Uttarakhand. The purposive sampling method was used to take a sample from different rehabilitation centers undergoing treatment for substance dependency in Haldwani city and they had at least one episode of relapse during the period of addiction. The study consists of a self-administered questionnaire and this questionnaire consists of paired comparison method technique. The age of the relapsed patients ranged from 18 to 60 years. The highest percentage (38%) is in the age group 26-33 years. Most of the addicted patients were at the senior secondary level of education. The age of onset of substance abuse ranged from 19-26 years. Most of the patients were addicted to alcohol. The results indicated that the main cause of relapse and return to substance abuse again was the Weakness of the will.The sociocultural cause is the most common cause of relapse among the three. There's a significant positive correlation between the age of the patients and with Family cause of relapse which means that when the age increases the patients would face the family cause of relapse.

Keywords : Relapse, Substance Abuse, Rehabilitation center, ADHD, PTSD, OCD.