Sedatives are medications that slow brain activity, used for anxiety and insomnia, with examples including benzodiazepines and barbiturates, which require cautious use due to addiction potential. Natural sedative plants like California poppy, valerian, and passionflower also offer calming effects but may have side effects including sleepiness and possible interactions with other sedative drugs. Prolonged use of prescription sedatives such as zolpidem is not recommended without prior non-drug treatments or specialist advice.