Are there risks associated with taking valerian?
Valerian is usually well-tolerated for up to a month to six weeks. Sometimes there may be headache or a “hangover” feeling after using valerian. A few studies indicate valerian impairs thinking for a period of time after it is used. There are no reports of drug interaction with alcohol with valerian. Also, there are no reports of “valerian addiction,” like you might find with some pharmaceutical sleep aids. Some people report a stimulating effect with valerian.