Eszopiclone vs Zolpidem: side-by-side comparison
Eszopiclone and Zolpidem belong to the same class (Non-benzodiazepine hypnotic (Z-drug)). They share therapeutic approach but differ in mechanism nuances, half-life, side-effect profile and available formulations. This comparison summarises what is common and where they diverge.
| Property | Eszopiclone | Zolpidem |
|---|---|---|
| Therapeutic class | Non-benzodiazepine hypnotic (Z-drug) | Non-benzodiazepine hypnotic (Z-drug) |
| CAS | 138729-47-2 | 82626-48-0 |
| ATC | N05CF04 | N05CF02 |
| Molecular weight | 388.81 g/mol | 307.39 g/mol |
| Brands with this active ingredient | 1 | 1 |
What they share
Both are in the Non-benzodiazepine hypnotic (Z-drug) class, giving them a common pharmacological architecture and many shared safety and management points. Choice within the class comes down to mechanism nuances, half-life, side-effect profile and individual response.
Key differences
Differences within the Non-benzodiazepine hypnotic (Z-drug) class are what matter in practice: half-life, route of administration, equivalent doses, specific interactions, predominant side-effect profile and accumulated clinical experience. This page frames them; the prescribing information gives quantitative detail.
Mechanisms compared
Eszopiclone: Eszopiclone is a positive allosteric modulator of the GABA-A receptor at a site close to the benzodiazepine binding site. Zolpidem: Zolpidem is a positive allosteric modulator of the GABA-A receptor with relative selectivity for the alpha-1 subunit, which is associated with sedation and sleep induction.
Indications compared
Eszopiclone: Eszopiclone is approved in adults for the treatment of insomnia, including difficulty falling asleep and difficulty maintaining sleep. Zolpidem: Zolpidem is approved in adults for the short-term treatment of insomnia, typically when difficulty falling asleep or maintaining sleep is associated with daytime impairment.
Safety profile
Eszopiclone: Common adverse effects include unpleasant taste, headache, dry mouth, drowsiness and dizziness. Zolpidem: Common adverse effects include drowsiness, dizziness, headache and gastrointestinal symptoms.
Frequently asked questions
Is Eszopiclone better than Zolpidem? ▾
Neither is universally better. Eszopiclone and Zolpidem share the Non-benzodiazepine hypnotic (Z-drug) class but differ in half-life, mechanism nuances and side-effect profile. The choice depends on the patient and the prescriber.
Can Eszopiclone and Zolpidem be combined? ▾
Combining two ingredients from the same Non-benzodiazepine hypnotic (Z-drug) class is uncommon and, in most cases, adds no benefit over one at an appropriate dose. The decision is always the prescriber's.
Do they have the same side-effect profile? ▾
Partly yes — they share many Non-benzodiazepine hypnotic (Z-drug) class effects, with nuances by mechanism and dose. The prescribing information lists differences.
Products with Eszopiclone
Products with Zolpidem
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.