Final answer:
The child in question may have attention deficit hyperactivity disorder (ADHD) based on the symptoms described. Stimulant medications like methylphenidate or amphetamine are commonly used to treat ADHD.
Step-by-step explanation:
Based on the symptoms described, the child may be experiencing attention deficit hyperactivity disorder (ADHD). ADHD is characterized by symptoms such as irritability, inattention, sleep disturbance, and withdrawal. In this case, the child's lack of eye contact and psychomotor agitation further support this diagnosis.
The appropriate medication to treat ADHD is usually a stimulant medication, such as methylphenidate (Ritalin) or amphetamine (Adderall). These medications help to improve attention, reduce impulsivity, and manage hyperactivity. However, it's important to consult a healthcare professional for an accurate diagnosis and to determine the most suitable treatment plan for the child.