For patients on clozapine, what should be carefully reviewed before treatment to avoid adverse interactions?

• A. Dietary habits
• B. Previous psychiatric history
• C. All current medications
• D. Past surgical procedures

Answer: (C)

Before initiating treatment with clozapine, it is crucial to carefully review all current medications that a patient is taking. Clozapine is known for its potential to cause significant drug interactions due to its effects on the cytochrome P450 enzyme system. Many medications can either enhance or inhibit the metabolism of clozapine, leading to either increased toxicity or decreased efficacy. Additionally, clozapine itself can have interactions with other drugs that can increase the risk of adverse effects, such as agranulocytosis or seizures.

Understanding the full range of medications a patient is currently using allows for the identification of potential contraindications and the implementation of appropriate monitoring or dose adjustments to ensure the safety and efficacy of treatment. This careful review is essential in the management of patients on clozapine, as it directly impacts their treatment plan and overall health outcomes.

While dietary habits, previous psychiatric history, and past surgical procedures may be important factors in a comprehensive assessment, they do not pose the same level of immediate risk for drug interactions and adverse reactions in relation to clozapine as current medications do.