"To sleep: perchance to dream" isn't only a quote from "Hamlet," but it is also the elusive goal of insomniacs around the world. Over-the-counter and prescription drugs can be effective in helping you fall--and stay--asleep, but they often come with side effects such as drowsiness during the day. Some herbs also promote slumber, but they may cause adverse reactions, too; it's a good idea to talk to your doctor before you start any herbal regimen.
Valerian
Since at least 200 AD, valerian has been used to relieve insomnia, according to the University of Maryland Medical Center. The center says researchers don't know exactly how this herb works, but it may increase gamma aminobutyric acid (GABA), a chemical in your brain that has a calming effect. The National Institutes of Health states that some studies suggest valerian is effective in overcoming insomnia, but more research is needed to confirm this finding.
Passionflower
Passionflower is another herb used to fight insomnia, but how it works, presents a mystery to scientists. As in the case of valerian, it is suspected that GABA may be connected with this herb's sedative properties, according to Memorial Sloan-Kettering Cancer Center. The University of Maryland states that current research is insufficient to establish passionflower's effectiveness, and the issue is complicated because insomniacs often use passionflower in combination with other sleep-promoting herbs.
Chamomile
Chamomile tea is a popular bedtime beverage consumed for its sedating properties. The effects of chamomile haven't been established scientifically, and further studies are needed, according to the National Institutes of Health. Also, chamomile may cause severe allergic reactions including anaphylaxis, a condition that can block your airways. Sloan-Kettering advises avoiding chamomile if you're allergic to ragweed, chrysanthemums or their relatives.
Lavender
Lavender is often used in aromatherapy to promote sleep; the fragrance can be inhaled in many ways, from sachets to massage oils and bath treatments. The National Institutes of Health explains that research shows lavender has a beneficial effect on insomnia, but more studies are needed to confirm proper proportions of lavender oil for this purpose.


