Which of the following is a symptom of moderate lithium toxicity?

Moderate lithium toxicity is characterized by a range of neurological and physical symptoms, as lithium affects the central nervous system. Confusion is one of the primary symptoms associated with moderate levels of lithium in the blood, reflecting the drug's effect on cognitive function and mental clarity. It is important to recognize that confusion can manifest as disorientation, difficulty in concentrating, or altered mental status, which are critical signs that indicate the need for medical evaluation and possible intervention in someone taking lithium.

While fatigue, headaches, and insomnia can be common side effects of lithium treatment and may occur at therapeutic levels, they are not typically indicative of moderate toxicity. Confusion specifically suggests a level of impairment that can lead to increased risk for falls, accidents, or worsening of overall health, making it a significant and serious symptom to monitor in patients on lithium therapy.

Understanding the distinction between various symptoms helps healthcare professionals monitor and manage patients effectively, ensuring safety and stability in treatment regimens.