Final answer:
Controlled substances have a high potential for dependency and respiratory depression, which is a danger specifically associated with central nervous system depressants like opioids and benzodiazepines. These substances can lead to addiction, dependence, and increased tolerance, presenting significant health risks if misused.
Step-by-step explanation:
Controlled substances are carefully monitored and have a high potential for dependency and respiratory depression. This is because many controlled substances can depress central nervous system activity, leading to decreased respiratory function, which can be dangerous or even fatal. Sedative drugs, including certain classes of controlled substances such as opioids, benzodiazepines, and barbiturates, commonly cause this effect.
Addiction refers to the compulsive use of a drug despite negative consequences, while dependence may be physical or psychological, manifesting as withdrawal symptoms when drug use is discontinued. With repeated use, individuals often develop tolerance, needing more of the substance to achieve the same effects, and they also might experience drug craving, indicating psychological dependence.
Therefore, the correct answer to the question is respiratory depression, which highlights the risk associated with the misuse of controlled substances and emphasizes the importance of monitoring their use.