5-Hydroxytryptophan is now available at most health food stores and can be taken before bed as well. Both of these compounds can be converted to serotonin in the brain which plays a role in sleep. Patients taking SSRI antidepressants such as Prozac should consult with their physicians prior to taking these agents because the dose of antidepressant may need to be reduced. This is true for St. John's Wort as well. It is available as a tea, in capsules, and as a tincture.
Some people use the herb valerian to fall asleep.
Valerian produces a drug-like hypnotic effect within the central nervous system similar to benzodiazepine drugs such as Valium and Halcion. Since valerian-containing products often are promoted as natural herbal remedies, the public mistakenly believes they are safe to take on a regular basis. Studies indicate, however, that there is a possible toxicity risk when taking valerian over an extended period of time. The use of tranquilizing drugs to solve chronic insomnia is not recommended by conventional or alternative medicine. The first problem cited by critics is addiction.