What is a common theme among drugs with abuse potential?

The common theme among drugs with abuse potential is that they frequently cause dependency. Many substances that are abused have the ability to create both psychological and physical dependence in users. This means that individuals who regularly use these drugs may find it difficult to stop due to cravings or withdrawal symptoms. This dependency can have significant effects on a person's life, including negative impacts on relationships, work, and overall health.

While there are indeed illegal drugs that have high abuse potential, not all drugs that can be abused are illegal; in fact, many legal substances, such as alcohol and prescription medications, also fit this category. Enhancing cognitive function is not a consistent characteristic, as many substances might impair cognitive abilities rather than enhance them. Lastly, the idea that these drugs are physically harmless is misleading; many of these substances come with a host of health risks and potential for serious side effects, contrary to the notion of being harmless. Thus, the association between dependency and drug abuse potential is a fundamental concept in the study of substance abuse.