Attention Deficit Hyperactivity Disorder (ADHD) Practice Test 2026 – Comprehensive All-in-One Study Guide for Exam Success!

The correct choice is based on understanding the typical side effects associated with stimulant medications. Stimulant medications, commonly prescribed for ADHD, often lead to several side effects because they affect neurotransmitter levels in the brain.

Insomnia, decreased appetite, and irritability are all recognized side effects of these medications. Insomnia occurs because stimulants can increase alertness and delay sleep onset. Decreased appetite is also common as these medications may suppress hunger signals, leading to lower food intake. Irritability can result from the medication's stimulating effects or from the adjustments made in daily routines due to its use.

Increased energy, however, is not categorized as a side effect of stimulant medications in the same way as the others. Rather, increased energy is often a desired therapeutic outcome when treating ADHD. Patients may experience improved concentration and vitality, which can be mistaken for or articulated as increased energy. Therefore, this choice does not align with the typical side effects that are observed with the use of stimulant medications.