The death rate from anorexia is higher than any other mental illness. Death usually results from which of the following? (Select all that apply.)

C This is a common and potentially life-threatening complication in individuals with anorexia nervosa who are undergoing treatment. It can lead to cardiac arrhythmias.

A. Anorexia nervosa can lead to electrolyte imbalances, including hyponatremia (low serum sodium level), due to inadequate intake of sodium and fluid restriction. Antidepressants, particularly selective serotonin reuptake inhibitors (SSRIs), can also contribute to hyponatremia by causing the syndrome of inappropriate antidiuretic hormone secretion (SIADH), which leads to water retention and dilutional hyponatremia. However, it is not as life-threatening as hypokalemia.

B. Anorexia nervosa can lead to electrolyte imbalances, including hyponatremia (low serum sodium level), due to inadequate intake of sodium and fluid restriction. However, it is not as life-threatening as hypokalemia.

D. Anorexia nervosa typically does not lead to hyperkalemia (high serum potassium level), as potassium is usually lost through purging behaviors or inadequate intake. Antidepressants also do not commonly cause hyperkalemia as a side effect.

B. This is the most appropriate initial action. One-to-one observation ensures constant monitoring of the client's safety and prevents further harm, such as another suicide attempt or self-harm. Given the client's history of depression and recent suicide attempt, ensuring their safety is paramount.

A. This option is not the first priority because while addressing anorexia nervosa is important, safety concerns related to the suicide attempt and potential substance abuse take precedence. Making a weight gain contract requires the client's cooperation and readiness, which may not be feasible immediately upon admission.

C. While assessing the severity of depression is crucial, it is secondary to ensuring immediate safety in this context. The client's safety must be established first through continuous observation and intervention.

D. While important to understand the substances involved in the suicide attempt, this action is secondary to ensuring ongoing safety through direct observation. Toxicology results can guide subsequent treatment decisions but are not as urgent as immediate safety measures.