Zolpidem: A Sedative for Insomnia and Sleep Disorders
Zolpidem is a sedative-hypnotic used to treat insomnia, particularly for individuals who have difficulty falling asleep. It belongs to a class of drugs called non-benzodiazepine hypnotics, which work by affecting gamma-aminobutyric acid (GABA) receptors in the brain to promote relaxation and sleep.
Mechanism of Action
Zolpidem binds to the GABA-A receptors, specifically in the alpha-1 subunit, which increases the inhibitory effects of GABA, a neurotransmitter that depresses the brain and induces sleep. This mechanism helps patients fall asleep more quickly and stay asleep longer without affecting the deeper stages of sleep as much as other sleep medications. Zolpidem also exhibits minimal anxiolytic, myorelaxant and anticonvulsant properties.
Indications
● Insomnia: Used primarily for the short-term treatment of insomnia, particularly for those who have difficulty falling asleep.
● Sleep Disorders: Occasionally used off-label for other sleep disorders, such as non-24-hour sleep-wake disorder in individuals who are blind.
Dosage and Administration
● Adults: The usual starting dose is 5 mg for women and 5–10 mg for men, taken immediately before bedtime. The dose may be increased based on response and tolerance, but should not exceed 10 mg per night.
● Elderly and Hepatic Impairment: A lower dose of 5 mg is recommended for elderly individuals and those with liver impairment due to slower metabolism.
Side Effects
● Common Side Effects: Drowsiness, dizziness, headache, and nausea.
● Serious Side Effects: Sleepwalking, memory loss, hallucinations, and behavioral changes. Rarely, zolpidem can cause sleep-driving and other complex behaviors.
Pregnancy Category: Category C – Zolpidem should be used during pregnancy only if the benefit outweighs the potential risks.
Common Brands: Zolfresh, Nitrest