What is the primary use of amphetamines in children?

The primary use of amphetamines in children is to treat Attention-Deficit/Hyperactivity Disorder (ADHD). Amphetamines are a class of stimulant medications that help increase attention, focus, and self-control by affecting certain neurotransmitters in the brain. In children diagnosed with ADHD, these medications can significantly reduce symptoms such as impulsivity, hyperactivity, and inattention, leading to improved functioning both at home and in school settings.

While they can have other effects, such as appetite suppression, this is not their primary purpose when prescribed for children. Similarly, they are not used to induce sleep or to address respiratory depression, as these conditions require different types of interventions and medications. Thus, the use of amphetamines for managing ADHD represents the most common and appropriate application within the context of pediatric care, making it the correct answer.