Zaleplon Reference

Plain English

What it is

Zaleplon (brand name Sonata) is a prescription sleeping pill approved by the U.S. Food and Drug Administration for the short-term treatment of insomnia, which means trouble sleeping. It is one of the medicines nicknamed Z-drugs, and it is a controlled substance (Schedule IV), meaning it has some potential for misuse.

What people use it for

People use it to help them fall asleep. It leaves the body quickly, so it is one of the shorter-acting sleep options.

What the science shows

A systematic review of these newer sleep drugs found the short-acting ones, including zaleplon, seem about equally effective and safe for short-term insomnia, with only small differences between them. Even so, the label warns it can affect how alert a person is the day after taking it.

The catch

Its strongest warning, called a boxed warning, is for complex sleep behaviors: people have walked, driven, eaten, and done other things while not fully awake and with no memory of it, and some of these events have caused serious injuries and even death. The label says to stop the medicine right away if this happens and not to use it again. Like other controlled sleep medicines, it can also lead to misuse and dependence, and it can leave a person less alert the next day.

Reference summary

Dundar 2004 Health Technol Assess systematic review covers zaleplon alongside zolpidem, eszopiclone, and zopiclone for short-term insomnia. Zaleplon's distinctive feature is the rapid elimination - the short half-life makes mid-sleep dosing viable when at least 4 hours of sleep time remain, which is not appropriate for the longer-acting Z-drugs.

Regulatory and posture

Categories

Sleep

Aliases

Sonata, Non-benzodiazepine GABA-A agonist (small molecule, not a peptide)

Evidence posture

human

Regulatory status

FDA-approved as Sonata (1999) for the short-term treatment of insomnia. Schedule IV controlled substance. The shortest-half-life Z-drug (~1 hour), positioning it for sleep-onset and middle-of-the-night use.

Content review status

label verified