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Advances in pharmacology have permitted more specific targeting of receptors, and greater selectivity of agents, which necessitates greater precision when describing these agents and their effects: Doctors often administer sedatives to patients in order to dull the patient's anxiety related to painful or anxiety-provoking procedures.
Although sedatives do not relieve pain in themselves, they can be a useful adjunct to analgesics in preparing patients for surgery, and are commonly given to patients before they are anaesthetized, or before other highly uncomfortable and invasive procedures like cardiac catheterization, colonoscopy or MRI.
Others take sedatives recreationally to relax and forget their worries.
While benzodiazepines can put people to sleep but, while asleep, the drugs disrupt sleep architecture: decreasing sleep time, delaying time to REM sleep, and decreasing deep slow-wave sleep (the most restorative part of sleep for both energy and mood).
Some heroin users may take them either to supplement their drug or to substitute for it.
Stimulant users may take sedatives to calm excessive jitteriness.
They increase tractability and compliance of children or troublesome or demanding patients.
Some sedatives can cause psychological and physical dependence when taken regularly over a period of time, even at therapeutic doses.