NSTK · 01.2026Independent supplement reference
NutriStack
Edition 1.0Updated July 13, 2026

Eszopiclone

Prescription ·Exploratory record · not publication-reviewed ·Updated July 13, 2026

Prescription non-benzodiazepine sedative-hypnotic (Schedule IV controlled substance) approved for insomnia. The S-isomer of zopiclone, it is one of the few prescription sleep aids approved for long-term use (no restriction on duration). Improves both sleep onset and sleep maintenance. Associated with an unpleasant metallic taste as a common side effect. Dosage must be determined by your prescribing physician.

Evidence tier
Strong
Indexed sources
10 2014–2025
Interactions
0
Category
Prescription
Read the sources → Compare profiles
Publication status

Exploratory record, not a reviewed medical publication.

See the editorial and medical-review policies for the publication gate.

This generated database record has not completed a claim-level review by a qualified human medical reviewer. Bibliography links and evidence labels are not approval. The page remains available for reference and is excluded from search indexing.

In short

What the research says.

A quick, data-only summary. The full evidence, dosing, and sources are below.

Prescription non-benzodiazepine sedative-hypnotic (Schedule IV controlled substance) approved for insomnia. NutriStack rates the supporting evidence as strong. Common adult dosing is 1–3 mg at bedtime (as prescribed by your physician), though a prescriber sets the actual dose. This profile indexes 10 sources.

What it's good for
  • Improved sleep onset3,5
  • Improved sleep maintenance3,5
  • Approved for long-term use
  • Reduced nighttime awakenings
  • Improved total sleep time3,5
What to watch for
  • Unpleasant metallic or bitter taste
  • Headache
  • Drowsiness
  • Known hypersensitivity to eszopiclone1,2
  • History of complex sleep behaviors after eszopiclone use9,3

The bottom line

Evidence rating strong. Most-documented uses: improved sleep onset, improved sleep maintenance, approved for long-term use. 10 sources indexed (2014–2025), with 0 interaction records on file.

The science

How it works, mechanistically.

Core mechanism

Binds to GABA-A receptors at or near the benzodiazepine binding site. While not as alpha-1 selective as zolpidem, it preferentially modulates GABA-A receptor subtypes involved in sleep initiation and maintenance. Its interaction with alpha-2 and alpha-3 subunits may contribute to anxiolytic and sleep-maintaining effects.6

Class
Sedative-Hypnotic (Non-Benzodiazepine)
Absorption
Best on an empty stomach
Dosing

Dosing & protocol.

Common range
1–3 mg at bedtime (as prescribed by your physician)
Recommended form
Tablet

Take immediately before bedtime on an empty stomach. Taking with or after a heavy, high-fat meal delays absorption. Allow at least 7–8 hours before planned awakening.2

Safety

Full safety detail.

Side effects

  • Unpleasant metallic or bitter taste
  • Headache
  • Drowsiness
  • Dizziness
  • Dry mouth
  • Next-day impairment
  • Complex sleep behaviors (rare)

Contraindications

  • Known hypersensitivity to eszopiclone1,2
  • History of complex sleep behaviors after eszopiclone use9,3
  • Severe hepatic impairment8
Sources

Sources, by evidence tier.

Numbered references. Citations throughout the page link here.

Meta-analyses & systematic reviews

4

Randomized controlled trials

1

Reference material

5
FAQ

Common questions.

Quick answers about Eszopiclone, drawn from the data on this page.

What is Eszopiclone?

Prescription non-benzodiazepine sedative-hypnotic (Schedule IV controlled substance) approved for insomnia. The S-isomer of zopiclone, it is one of the few prescription sleep aids approved for long-term use (no restriction on duration). Improves both sleep onset and sleep maintenance. Associated with an unpleasant metallic taste as a common side effect. Dosage must be determined by your prescribing physician.

What is Eszopiclone used for?

Commonly cited benefits of Eszopiclone include: Improved sleep onset; Improved sleep maintenance; Approved for long-term use; Reduced nighttime awakenings; Improved total sleep time. NutriStack rates the overall evidence as strong.

What is a typical dose of Eszopiclone?

A typical adult dose of Eszopiclone is 1–3 mg at bedtime (as prescribed by your physician). The commonly recommended form is Tablet. These are general ranges, not personalized advice; confirm the right dose with a clinician.

What are the side effects of Eszopiclone?

Reported side effects include unpleasant metallic or bitter taste, headache, drowsiness, dizziness, dry mouth, next-day impairment. This is educational information; check with a healthcare professional before use.

How strong is the evidence for Eszopiclone?

NutriStack rates this as Strong, meaning multiple high-quality meta-analyses or systematic reviews converge on the same finding. Full tier criteria are at https://nutristackapp.com/methodology/evidence-tiers.

Use this with your stack

Eszopiclone in NutriStack.

Add it to your stack, see how it interacts with everything else you take, and get a Stack Score that updates the moment it does.

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NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.