Valerian root has helped people relax and sleep better for centuries. Extracts from this European and Asian perennial plant act on GABA receptors in the brain, producing a calming effect.
Most people take valerian 30 to 60 minutes before bed as a tea, capsule, or tincture to support restful sleep. Some find it useful during the day for mild stress, though it often causes drowsiness.
Side effects can include sleepiness, dizziness, or an upset stomach. Valerian may intensify the effects of alcohol, sedatives, and other central nervous system depressants. Skip driving or operating machinery until you know how it hits you.