Are there any herbal supplements that can prolong the effects of anesthesia?
There are several herbal supplements that have sedative qualities of their own. They can produce somnolence, as well as relaxation. These agents need to be discontinued prior to receiving an anaesthetic because they can potentiate that anaesthetic and they can remain sleepy for a longer period of time. Those substances are Kava-Kava, Valerian and St. John's Wort.