There's probably no need to talk about the side effects of drug addiction, but once again we'd like to add, that it is not only bad for your health, but also for your psyche and social life. The withdrawals, if hopefully, you do go to drug rehab, are not just physically, but also mentally very demanding. Drugs like crack cocaine, heroin, and methamphetamine are particularly habit-forming, and recreational use can soon become a habitual drug use, especially if you're in a place where you feel like you need to escape from life, or you don't have the right support network to look out for you. Getting off such drugs can be incredibly tricky once hooked.