How are CYP2C19 and stress related?

The relationship between CYP2C19 and stress is indirect and primarily pharmacogenetic. CYP2C19 metabolizes several drugs used for stress-related conditions, such as SSRIs (e.g., escitalopram, citalopram) and benzodiazepines (e.g., diazepam). Genetic variants (*2, *3, *17) affect enzyme activity, influencing drug efficacy and side effect risk. However, there is limited evidence for a direct link between CYP2C19 and the physiological stress response (e.g., cortisol, HPA axis). Most studies are pharmacogenetic with moderate effect sizes. A single SNP test is not sufficient to guide stress management. Clinical decisions should be based on symptoms and treatment response. Evidence: unclear. Caveat: No direct clinical recommendation can be derived from this SNP alone.