Final answer:
The patient should stop taking valerian on the day of surgery to ensure the safety and effectiveness of the procedure.
Step-by-step explanation:
The patient should stop taking valerian on the day of surgery. Valerian is an herbal supplement that is known to have sedative effects and may interact with anesthesia and other medications used during the surgery.
Continuing to take valerian can increase the risk of excessive sedation, which can interfere with the anesthesia and recovery process. It is important for the patient to follow their healthcare provider's instructions and discontinue any herbal supplements, including valerian, before undergoing surgery to ensure the safety and effectiveness of the procedure.
If the patient is unsure about whether to continue or stop taking valerian, it is best to consult with their healthcare provider who can provide personalized advice based on their specific situation.