Valerian is an herbal extract. It is one of the leading natural supplements for managing anxiety and insomnia. But, according to the Natural Medicines Comprehensive Data Base, there is not enough proof to say that it is effective in treating insomnia. Some limited findings show that valerian may reduce the time needed to fall asleep and may improve sleep quality. Unlike the benzodiazepines, most people feel no morning grogginess after taking valerian. Other findings were not as promising. They showed that when compared to a placebo, valerian didn't relieve anxiety or insomnia any better than the placebo. There is some support for the idea that using valerian over a period of time (such as over four weeks) may be more effective than taking it one night only. People who are poor sleepers may find more benefit that those who are normally good sleepers.