Yes, cannabis can be addictive. However, the same can be said about caffeine and sugar, yet both are relatively harmless. The real question to ask then is how addictive is cannabis compared to other (more harmful) substances and what are the benefits..In terms of addictiveness, studies have shown that people who try cannabis are less likely to become addicted compared to most other drugs, including tobacco, heroin, cocaine, alcohol or stimulants, all of which lack the medicinal benefits of cannabis. In terms of numbers, the life-time risk of developing dependence among those who have ever used cannabis was relatively low at 9%, compared to 32% for nicotine, 23% for heroin, 17% for cocaine, 15% for alcohol and 11% for stimulants. More than nine-in-ten people who try cannabis will not become addicted to it.