A male patient who abuses alcohol tells the nurse that he is treating himself with kava. Which instruction should the nurse include in patient teaching?

Kava is an herbal supplement used for its anxiolytic and sedative properties, but it carries a significant risk of additive central nervous system depression when combined with alcohol or other CNS depressants. Both kava and alcohol independently depress the central nervous system, and using them together greatly amplifies sedation, impairs psychomotor function, and increases the risk of serious harm including respiratory depression and loss of consciousness. The most clinically appropriate instruction for a patient who is currently using both substances is to avoid combining kava with alcohol, clearly explaining the additive CNS depression risk. Simply recommending a different herb does not address the immediate safety concern regarding combined CNS depression. Telling the patient to use either kava or alcohol acknowledges the interaction but is not the clearest safety-focused instruction, as the primary concern is concurrent use. Instructing the patient to stop kava immediately without explanation may reduce adherence and does not educate the patient about why the combination is dangerous. Additionally, there is evidence that kava itself can cause hepatotoxicity, a concern especially relevant in patients who abuse alcohol and already have compromised liver function, reinforcing the importance of discouraging the combination. Clear, nonjudgmental teaching about drug-herb-alcohol interactions is a key nursing responsibility.