Are complementary and alternative medicines effective for insomnia?
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Valerian improves sleep quality and decreases minutes to fall asleep, while appearing relatively safe. Melatonin reduces the time taken to fall asleep in those with delayed sleep phase syndrome. In seniors, melatonin can also increase the percentage of time spent in bed actually sleeping. Kava and skullcap have been linked to hepatotoxicity, and St. John's wort and chamomile may interact with commonly prescribed medications.
Evidence Based Practice 13(6): 13.