In terms of abuse and addiction,which category of drugs is of most concern?

A) sleeping aids
B) dietary supplements
C) antibiotics
D) psychoactive drugs

Psychoactive drugs, which include opioids, benzodiazepines, amphetamines, and other mind-altering substances, are of most concern for abuse and addiction, as they have a high potential for dependence and can cause severe harm to the user's physical and mental health. Sleeping aids and antibiotics can also be misused, but their potential for addiction is relatively low. Dietary supplements are not considered drugs and are not known to cause addiction, although they can have harmful interactions with other medications.