This study assessed the pattern of drug abuse and the reasons for relapse of addiction among male drug addicts seeking rehabilitative services in different centres in Lahore, Pakistan. A cross-sectional survey was conducted on male drug abusers from April to December 2016. Nonprobability purposive sampling was done to collect a sample of 119 participants. A structured questionnaire and in-depth interviews were used for data collection. Out of 119 participants, 71.4% were in the age group 15–35 years. Educational levels were low in the majority, with 68.1% below secondary education. Unmarried (51.3%) and unemployed (44.5%) participants were at the greatest risk of using drugs. The age of addiction in 45% of patients was 5 years. Reasons for starting drug abuse were recreation (37%), curiosity (34.5%), and life-changing events (14.3%). Reasons for relapse included association with former addicts, negative reactions from family, inability to manage the craving and work/social stress.