Certain groups of people are more likely to develop substance abuse issues. One group is immigrants or other people who have left their home country. They often have issues in their new country, and some use drugs as a way to feel better.  Another group that is at risk is homeless children. They will use drugs to become closer to each other. A third group that is at risk is musicians. They may use stimulants to make themselves more active and happy. Singers can also hurt themselves if they use drugs that are inhaled.