Fast forwarding to modern times, valerian has been studied in several well designed clinical trials. A placebo-controlled study of 128 patients showed that giving 400 to 900mg of valerian root at bedtime resulted in a decrease in sleep latency (time required to fall asleep at night), a reduction in night time awakenings as well as an increase in dream recall. All this was accomplished with no hangover effect. Lower dosages of valerian were shown to be as effective as higher dosages in this study.
A German study found that the combined effect of valerian root and lemon balm on the sleep patterns of 20 volunteers compared favorably with a tranquilizer in the Valium family known as triazolam.
Based on this and other research, Seattle naturopathic physician Dr. Donald Brown uses valerian root in combination with lemon balm and passion flower for the treatment of insomnia. He also finds valerian root to be “a safe and efficacious tool in the early treatment of anxiety, as well as the long-term management of those unable to use or attempting to withdraw from the benzodiazepines (Valium and its cousins).”
In fact, Valerian has been called the herbal Valium—it normalizes the nervous system, it acts as a sedative in cases of agitation and as a stimulant in cases of extreme fatigue and it also has a minor action of lowering blood pressure, enhancing the flow of bile and relaxing the intestinal muscles. However, its prime pharmacological effect is that of a sedative. Although considered to be safe during pregnancy and lactation, to be on the safe side its use is not recommended.
Other herbs traditionally combined with valerian root include hops and skullcap. Hops or Humulus lupulus is a native British plant well known for its use in making beer. In the herbal world, hops is also used as a sedative and for its sleep inducing effects.
Skullcap, or Scutellaria lateriflora, grows in Europe and North America, and is well known for its beneficial sedative effect on the nervous system. It has been used in the past to treat epilepsy.