herbal sedative

lorazepam + valerian

Valerian root contains valerenic acid and related compounds thought to modulate GABA-A receptor activity. Lorazepam is a benzodiazepine that also enhances GABA signaling. Taking them together may produce additive central nervous system depression, with a theoretical increase in drowsiness, slowed thinking, and impaired coordination. The interaction is mechanism-based and flagged as a precaution; human reports of serious harm are lacking, so it is best treated as a reason for caution rather than alarm.