There are so many substances available that are capable of causing addiction that it can be overwhelming and confusing to learn about each and every one. More are being developed all the time, and the new designer drugs are often variations on substances that have been available for years. However, the effort invested in becoming knowledgeable about substances of abuse is worthwhile for you and your loved ones. These drugs are dangerous and can produce lifelong harmful effects. Knowledge is one of your most powerful weapons.