Zaleplon 10mg capsules
Zaleplon is a sedative/hypnotic, mainly used for insomnia.
Minimal controls; includes benzodiazepines and anabolic steroids
Legal requirements and restrictions
Benzodiazepines and similar medicines. Subject to minimal controlled drug requirements.
Legal requirements
- Prescriptions valid for 28 days
- No controlled drugs register required
- No safe custody requirements
- Record keeping requirements for imports/exports
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Official documents, adverse reaction reporting, and safety monitoring
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MHRA alerts for Zaleplon
Safety monitoring data
Yellow Card reports
The MHRA Yellow Card scheme collects reports of suspected side effects from healthcare professionals and patients. View the Drug Analysis Profile (iDAP) for real-world adverse reaction data.
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Suspected adverse reactions reported for Zaleplon
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Data from the MHRA Yellow Card scheme. A reported reaction does not necessarily mean the medicine caused it. Contains public sector information licensed under the Open Government Licence v3.0.
EudraVigilance
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Suspected adverse reactions reported for Zaleplon
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EudraVigilance data is published by the European Medicines Agency (EMA). A suspected adverse reaction is not necessarily caused by the medicine.
4 branded products available
WHO defined daily dose (DDD)
10 mg
Not a recommended dose. The DDD is the assumed average maintenance dose per day for a drug used for its main indication in adults. It is a statistical measure used for research and comparison purposes only.
Source: WHO Collaborating Centre for Drug Statistics Methodology, distributed via the NHS dm+d supplementary mapping files (NHSBSA). Contains public sector information licensed under the Open Government Licence v3.0.
Therapeutically similar medicines
Similarity is based on WHO Anatomical Therapeutic Chemical (ATC) classification and on a factual NHS dm+d therapeutic-grouping code prefix. Source data: NHS dm+d via TRUD (OGL v3.0), WHO ATC/DDD Index.
NHS prescribing volume and spending trends
Guidelines from the National Institute for Health and Care Excellence
NICE clinical guidance(2)
Guidance on the use of zaleplon, zolpidem and zopiclone for the short-term management of insomnia (TA77)
Borderline personality disorder: recognition and management (CG78)
Source: National Institute for Health and Care Excellence (NICE). Contains public sector information licensed under the Open Government Licence v3.0.
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Pharmacy links redirect to the retailer's own search and do not represent real-time stock levels. Shortage and safety information sourced from MHRA drug safety updates (gov.uk, Crown Copyright under OGL v3.0).
Codes for healthcare professionals and prescribing systems
These codes are used by healthcare IT systems and prescribers to identify this medicine.
NHS UK identifiers
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SNOMED CT and dm+d codes from NHS TRUD (Technology Reference data Update Distribution), licensed under the Open Government Licence v3.0. ATC codes from the WHO Collaborating Centre for Drug Statistics Methodology (whocc.no).
Active and completed clinical studies from ClinicalTrials.gov
Source: ClinicalTrials.gov, a database of the U.S. National Library of Medicine (NLM), National Institutes of Health (NIH). Data accessed via ClinicalTrials.gov API v2. Trial information is provided for research purposes and does not constitute medical advice.
Academic studies and reviews for this medicine's active substance
Showing the 50 most relevant studies.
Reviews & meta-analyses: 7 · Randomised trials: 2 · 1996–2026
Showing the 50 most relevant studies, sorted by most relevant.
De Crescenzo F, D'Alò GL, Ostinelli EG, et al.
2022
- Sleep Initiation and Maintenance Disorders
- Doxepin
- Benzodiazepines
BackgroundBehavioural, cognitive, and pharmacological interventions can all be effective for insomnia. However, because of inadequate resources, medications are more frequently used worldwide. We aimed to estimate the comparative effectiveness of pharmacological treatments for the acute and long-term treatment of adults with insomnia disorder.MethodsIn this systematic review and network meta-analysis, we searched the Cochrane Central Register of Controlled Trials, MEDLINE, PubMed, Embase, PsycINFO, WHO International Clinical Trials Registry Platform, ClinicalTrials.gov, and websites of regulatory agencies from database inception to Nov 25, 2021, to identify published and unpublished randomised controlled trials. We included studies comparing pharmacological treatments or placebo as monotherapy for the treatment of adults (≥18 year) with insomnia disorder. We assessed the certainty of evidence using the confidence in network meta-analysis (CINeMA) framework. Primary outcomes were efficacy (ie, quality of sleep measured by any self-rated scale), treatment discontinuation for any reason and due to side-effects specifically, and safety (ie, number of patients with at least one adverse event) both for acute and long-term treatment. We estimated summary standardised mean differences (SMDs) and odds ratios (ORs) using pairwise and network meta-analysis with random effects. This study is registered with Open Science Framework, https://doi.org/10.17605/OSF.IO/PU4QJ.FindingsWe included 170 trials (36 interventions and 47 950 participants) in the systematic review and 154 double-blind, randomised controlled trials (30 interventions and 44 089 participants) were eligible for the network meta-analysis. In terms of acute treatment, benzodiazepines, doxylamine, eszopiclone, lemborexant, seltorexant, zolpidem, and zopiclone were more efficacious than placebo (SMD range: 0·36-0·83 [CINeMA estimates of certainty: high to moderate]). Benzodiazepines, eszopiclone, zolpidem, and zopiclone were more efficacious than melatonin, ramelteon, and zaleplon (SMD 0·27-0·71 [moderate to very low]). Intermediate-acting benzodiazepines, long-acting benzodiazepines, and eszopiclone had fewer discontinuations due to any cause than ramelteon (OR 0·72 [95% CI 0·52-0·99; moderate], 0·70 [0·51-0·95; moderate] and 0·71 [0·52-0·98; moderate], respectively). Zopiclone and zolpidem caused more dropouts due to adverse events than did placebo (zopiclone: OR 2·00 [95% CI 1·28-3·13; very low]; zolpidem: 1·79 [1·25-2·50; moderate]); and zopiclone caused more dropouts than did eszopiclone (OR 1·82 [95% CI 1·01-3·33; low]), daridorexant (3·45 [1·41-8·33; low), and suvorexant (3·13 [1·47-6·67; low]). For the number of individuals with side-effects at study endpoint, benzodiazepines, eszopiclone, zolpidem, and zopiclone were worse than placebo, doxepin, seltorexant, and zaleplon (OR range 1·27-2·78 [high to very low]). For long-term treatment, eszopiclone and lemborexant were more effective than placebo (eszopiclone: SMD 0·63 [95% CI 0·36-0·90; very low]; lemborexant: 0·41 [0·04-0·78; very low]) and eszopiclone was more effective than ramelteon (0.63 [0·16-1·10; very low]) and zolpidem (0·60 [0·00-1·20; very low]). Compared with ramelteon, eszopiclone and zolpidem had a lower rate of all-cause discontinuations (eszopiclone: OR 0·43 [95% CI 0·20-0·93; very low]; zolpidem: 0·43 [0·19-0·95; very low]); however, zolpidem was associated with a higher number of dropouts due to side-effects than placebo (OR 2·00 [95% CI 1·11-3·70; very low]).InterpretationOverall, eszopiclone and lemborexant had a favorable profile, but eszopiclone might cause substantial adverse events and safety data on lemborexant were inconclusive. Doxepin, seltorexant, and zaleplon were well tolerated, but data on efficacy and other important outcomes were scarce and do not allow firm conclusions. Many licensed drugs (including benzodiazepines, daridorexant, suvorexant, and trazodone) can be effective in the acute treatment of insomnia but are associated with poor tolerability, or information about long-term effects is not available. Melatonin, ramelteon, and non-licensed drugs did not show overall material benefits. These results should serve evidence-based clinical practice.FundingUK National Institute for Health Research Oxford Health Biomedical Research Centre.
Abstract licence: CC BY
Liu H, Wang Y, Li M, et al.
2025
- Sleep Initiation and Maintenance Disorders
- Hypnotics and Sedatives
- Orexin Receptor Antagonists
BackgroundMedications, including dual orexin receptor antagonists (DORAs), benzodiazepines (BZDs), Z-drugs and melatonin receptor agonists, are common medications for insomnia disorder, but holistic comparisons of their efficacy and safety are not quite clear.ObjectiveTo investigate the efficacy and safety profiles of agents for treating insomnia disorder and further establish a clinical algorithm in terms of type of insomnia based on the "time window" generated from adjusting for certain confounding factors.MethodsRelevant randomized controlled trials (RCTs) were retrieved from PubMed, Embase, Scopus, the Cochrane Library, Web of Science, and ClinicalTrials.gov from inception to April 15, 2025. The standard mean difference (SMD) was generated for consecutive variants, including the wake after sleep onset(WASO), latency to persistent sleep(LPS), total sleep time(TST), and sleep efficiency(SE), for pairwise comparisons via Bayesian network meta-regression (NMR) analyses adjusted for the follow-up period and age by RStudio 4.4.2. Pharmacovigilance (PV) was investigated by leveraging the FAERS database, and odds ratios (ORs) were generated for dichotomous and ordinal variants for pairwise comparisons via STATA 18.0 MP.ResultA total of 15 studies evaluating 10 treatment regimens involving 2408 patients were included in the final analysis. For the WASO, compared with the placebo group, dimdazenil 2.5 mg/d (SMD = -0.388, 95 % CI: -0.608 to -0.166), lemborexant 10 mg/d (SMD = -0.624, 95 % CI: -0.894 to -0.355), lemborexant 5 mg/d (SMD = -0.612, 95 % CI: -0.88 to -0.342), daridorexant 25 mg/d (SMD = -0.957, 95 % CI: -1.436 to -0.479), melatonin 6 mg/d (SMD = -0.741, 95 % CI: -1.423 to -0.044), zolpidem 10 mg/d (SMD = -0.348, 95 % CI: -0.61 to -0.068), doxepin 3 mg/d (SMD = -0.497, 95 % CI: -0.713 to -0.282) were significantly superior. Among the effective regimens, lemborexant 10 mg/d, lemborexant 5 mg/d, daridorexant 25 mg/d, melatonin 6 mg/d, and doxepin 3 mg/d were comparable. However, dimdazenil 2.5 mg/d (SMD = 0.568, 95 % CI: 0.046 to 1.096) and zolpidem 10 mg/d (SMD = 0.608, 95 % CI: 0.074 to 1.171) were significantly inferior to daridorexant 25 mg/d.After adjusting for the follow-up period, the results resembled those of the raw analysis except for the loss of significant superiority of melatonin 6 mg/d (SMD = -0.727, 95 % CI: -1.48 to 0.01) over the placebo. However, melatonin 6 mg/d demonstrated a "time window" of significant superiority over the control group from the 10th to 40th weeks. After adjusting for age, dimdazenil 2.5 mg/d (SMD = -0.355, 95 % CI: -0.652 to -0.1), lemborexant 10 mg/d (SMD = -0.508, 95 % CI: -0.9 to -0.114), zolpidem 10 mg/d (SMD = -0.526, 95 % CI: -0.84 to -0.158) demonstrated significant superiority over placebo. In terms of safety, with respect to nervous system disorders, safety signals were detected in suvorexant (IC025 = 0.212; 95 % CI: 1.214 to 1.334), lemborexant (IC025 = 0.221; 95 % CI: 1.236 to 1.567), daridorexant (IC025 = 0.205; 95 % CI: 1.21 to 1.427) and doxepin (IC025 = 0.066; 95 % CI: 1.091 to 1.411). In terms of dyspnoea, eszopiclone (OR ranging from 0.556 to 0.669) had significantly lower constituent ratios than daridorexant, melatonin and zolpidem did. Melatonin (OR = 1.568, 95 % CI = 1.192 to 2.061, p = 0.001) and zolpidem (OR = 1.302, 95 % CI = 1.026 to 1.653, p = 0.03) had a significantly higher constituent ratio than suvorexant. The proportion of patients with severe dyspnoea caused by daridorexant (OR = 0.256, 95 % CI = 0.096 to 0.678, p = 0.006) was significantly lower than that caused by suvorexant and lemborexant. For adverse reaction outcomes, zaleplon (OR = 9.888, 95 % CI = 1.124 to 86.944, p = 0.039) had a significantly higher effect than daridorexant on severe dyspnoea.ConclusionComprehensively considering the efficacy effect size, time windows (follow-up period, age, and types of insomnia), PV, severity of imperative adverse events, we propose prioritizing the use of daridorexant 25 mg/d for insomnia characterized by difficulty maintaining sleep and insufficient sleep duration. For insomnia characterized by difficulty falling asleep, we recommend prioritizing the use of lemborexant 10 mg/day or zolpidem 10 mg/day. For overall poor sleep efficiency, we recommend using lemborexant. Drug selection should be based on the types of insomnia and drug safety. More head-to-head clinical trials are needed to confirm those findings.
Abstract licence: CC BY-NC
E. Sanna, Fabio Busonero, G. Talani, et al.
European journal of pharmacology, 2002
David F Dinges, Mathias Basner, Adrian J Ecker, et al.
Sleep, 2018
R. Élie, E. Rüther, Ibrahim Farr, et al.
The Journal of clinical psychiatry, 1999
J. Verster, E. Volkerts, A. H. Schreuder, et al.
Journal of Clinical Psychopharmacology, 2002
E. Stranks, S. Crowe
Journal of Clinical and Experimental Neuropsychology, 2014
A. Marbin, M. Brooke, Beatrice Thomas, et al.
The American Journal of Geriatric Psychiatry, 2023
S. Ancoli-Israel, J. Walsh, R. Mangano, et al.
Primary care companion to the Journal of clinical psychiatry, 1999
Florendo L Joya, D. Kripke, R. Loving, et al.
Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine, 2009
Sources: aggregated from Europe PMC (EMBL-EBI), OpenAlex, Crossref, PubMed and other open scholarly databases. Retracted articles are excluded. Study information is provided for research purposes and does not constitute medical advice.
Pharmacology and chemical data from DrugBank
Key facts
Drug status
Approved
Major interactions
2 found
Half-life
1 hour
Mechanism
Zaleplon exerts its action through subunit modulation of the GABABZ receptor chloride channel macromolecular complex.
Food interactions
2 warnings
Human targets
1 target
Data: DrugBank · CC BY-NC 4.0
Pharmacokinetics at a glance
Absorption
Half-life
1 hour
Protein binding
60%
Volume of distribution
1.4 L/kg
Metabolism
Elimination
1%
Clearance
1 L/h
Pharmacokinetic data: DrugBank · CC BY-NC 4.0
Known interactions with other medicines. Always consult a healthcare professional.
Showing 50 of 1633 interactions
How the body processes this drug — absorption, distribution, metabolism, and elimination
Proteins and enzymes this drug interacts with in the body
PMID:23909897 PMID:25489750 PMID:29950725 PMID:30602789
GABA-gated chloride channels, also named GABA(A) receptors (GABAAR), consist of five subunits arranged around a central pore and contain GABA active binding site(s) located at the alpha and beta subunit interface(s) .
PMID:29950725 PMID:30602789
When activated by GABA, GABAARs selectively allow the flow of chloride anions across the cell membrane down their electrochemical gradient .
PMID:23909897 PMID:29950725 PMID:30602789
Alpha-1/GABRA1-containing GABAARs are largely synaptic (By similarity). Chloride influx into the postsynaptic neuron following GABAAR opening decreases the neuron ability to generate a new action potential, thereby reducing nerve transmission (By similarity). GABAARs containing alpha-1 and beta-2 or -3 subunits exhibit synaptogenic activity; the gamma-2 subunit being necessary but not sufficient to induce rapid synaptic contacts formation .
PMID:23909897 PMID:25489750
GABAARs function also as histamine receptor where histamine binds at the interface of two neighboring beta subunits and potentiates GABA response (By similarity).
GABAARs containing alpha, beta and epsilon subunits also permit spontaneous chloride channel activity while preserving the structural information required for GABA-gated openings (By similarity). Alpha-1-mediated plasticity in the orbitofrontal cortex regulates context-dependent action selection (By similarity). Together with rho subunits, may also control neuronal and glial GABAergic transmission in the cerebellum (By similarity)
Enzymes involved in drug metabolism — important for understanding drug interactions
ATC N05CF03
Chemical identifiers
CAS, UNII, InChI Key and database cross-references
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Chemical identifiers
CAS, UNII, InChI Key and database cross-references
Linked compound data from DrugBank Open Data (CC BY-NC 4.0)
Zaleplon
Additional database identifiers
Drugs Product Database (DPD)
11989
ChemSpider
5517
BindingDB
86521
ZINC
ZINC000000006300
HUGO Gene Nomenclature Committee (HGNC)
HGNC:4075
GenAtlas
GABRA1
GeneCards
GABRA1
GenBank Gene Database
X13584
GenBank Protein Database
31631
Guide to Pharmacology
404
UniProt Accession
GBRA1_HUMAN
HUGO Gene Nomenclature Committee (HGNC)
HGNC:2637
GenAtlas
CYP3A4
GeneCards
CYP3A4
GenBank Gene Database
M18907
Guide to Pharmacology
1337
UniProt Accession
CP3A4_HUMAN
HUGO Gene Nomenclature Committee (HGNC)
HGNC:2638
GenAtlas
CYP3A5
GeneCards
CYP3A5
GenBank Gene Database
J04813
GenBank Protein Database
181346
Guide to Pharmacology
1338
UniProt Accession
CP3A5_HUMAN
HUGO Gene Nomenclature Committee (HGNC)
HGNC:2640
GeneCards
CYP3A7
GenBank Gene Database
D00408
GenBank Protein Database
220149
UniProt Accession
CP3A7_HUMAN
HUGO Gene Nomenclature Committee (HGNC)
HGNC:553
GeneCards
AOX1
GenBank Gene Database
L11005
GenBank Protein Database
438656
Guide to Pharmacology
3186
UniProt Accession
AOXA_HUMAN
DrugBank citations
If you use DrugBank data in your research, please cite:
- DrugBank 6.02024Recommended citationKnox C., Wilson M., Klinger C.M., et alDrugBank 6.0: the DrugBank Knowledgebase for 2024Nucleic Acids Res. 2024 Jan 552(D1):D1265-D1275
- DrugBank 5.02018Wishart D.S., Feunang Y.D., Guo A.C., et alDrugBank 5.0: a major update to the DrugBank database for 2018Nucleic Acids Res. 2017 Nov 846(D1):D1074-D1082
- DrugBank 4.02014Law V., Knox C., Djoumbou Y., et alDrugBank 4.0: shedding new light on drug metabolismNucleic Acids Res. 2014 Jan 142(1):D1091-7
- DrugBank 3.02011Knox C., Law V., Jewison T., et alDrugBank 3.0: a comprehensive resource for 'omics' research on drugsNucleic Acids Res. 2011 Jan39(Database issue):D1035-41
- DrugBank 2.02008Wishart D.S., Knox C., Guo A.C., et alDrugBank: a knowledgebase for drugs, drug actions and drug targets.Nucleic Acids Research2008 Jan36(Database issue):D901-6
- DrugBank 1.02006Wishart D.S., Knox C., Guo A.C., et alDrugBank: a comprehensive resource for in silico drug discovery and exploration.Nucleic Acids Research2006 Jan 134(Database issue):D668-72