List of investigational insomnia drugs

Last updated

This is a list of investigational insomnia drugs, or drugs that are currently under development for clinical use for the treatment of insomnia but are not yet approved. They may also be referred to as investigational hypnotics.

Contents

Chemical/generic names are listed first, with developmental code names, synonyms, and brand names in parentheses. The format of list items is "Name (Synonyms) – Mechanism of Action [Reference]".

This list was last comprehensively updated in September 2025. It is likely to become outdated with time.

Under development

Preregistration

Phase 3

Phase 2

Phase 1/2

Preclinical

Not under development

No development reported

Discontinued

Clinically used drugs

Approved drugs

GABAA receptor positive allosteric modulators

Benzodiazepines

Nonbenzodiazepines/Z-drugs

  • Eszopiclone (Esopiclone; Estorra; Lunesta; Lunivia; S-Zopiclone; SEP-0227018; SEP-190; SEP-225441) – GABAA receptor positive allosteric modulator and nonbenzodiazepine/Z-drug [56]
  • Zaleplon (Sonata; Zerene; CL–284846; L–846; LJC–10846) – GABAA receptor positive allosteric modulator and nonbenzodiazepine/Z-drug [57]
  • Zolpidem extended-release (Ambien CR; FK-199B; Stilnox; Zolpidem XR) – GABAA receptor positive allosteric modulator and nonbenzodiazepine/Z-drug [58]
  • Zolpidem oral spray (Zolpimist) – GABAA receptor positive allosteric modulator and nonbenzodiazepine/Z-drug [59]

Orexin receptor antagonists

  • Daridorexant (Quviviq; ACT-541468; nemorexant) – orexin OX1 and OX2 receptor antagonist [60]
  • Lemborexant (Dayvigo; E-2006) – orexin OX1 and OX2 receptor antagonist [61]
  • Suvorexant (Belsomra; MK-4305) – orexin OX1 and OX2 receptor antagonist [62]

Melatonin receptor agonists

  • Melatonin controlled-release (Circadin; Orlogin; PedPRM; Slenyto; KI-1001) – melatonin MT1 and MT2 receptor agonist [63]
  • Ramelteon (Rozerem; TAK-375) – melatonin MT1 and MT2 receptor agonist [64]

Other drugs

Discontinued drugs

GABAA receptor positive allosteric modulators

Other drugs

  • Fenadiazole (phénadiazole; Hypnazol, Eudormil, Viodor) – unknown mechanism of action

Off-label drugs

See also

References

  1. "Tasimelteon - Vanda Pharmaceuticals - AdisInsight".
  2. "Brexpiprazole - Lundbeck/Otsuka - AdisInsight".
  3. "Diphenhydramine/Lorazepam/Zolpidem - Eusol Biotech - AdisInsight".
  4. "YZJ 1139 - AdisInsight".
  5. "Vornorexant - Taisho Pharmaceutical - AdisInsight".
  6. "Zuranolone - Biogen/SAGE Therapeutics - AdisInsight".
  7. "Lumateperone - Intra-Cellular Therapies - AdisInsight".
  8. "Pimavanserin - ACADIA Pharmaceuticals - AdisInsight".
  9. "Piromelatine - Neurim Pharmaceuticals - AdisInsight".
  10. "Seltorexant - Janssen Research & Development/Minerva Neurosciences - AdisInsight".
  11. "Sunobinop - Imbrium Therapeutics/Shionogi - AdisInsight".
  12. "Tasipimidine - Orion - AdisInsight".
  13. "Trazodone - Angelini Group/Labopharm - AdisInsight".
  14. "SVT 4A1011 - AdisInsight".
  15. "TPT 0601 - AdisInsight".
  16. "Filorexant - AdisInsight".
  17. "HEC 83518 - AdisInsight".
  18. "IN AQUL 001 - AdisInsight".
  19. "Delving into the Latest Updates on IN-AQUL-001 with Synapse".
  20. "JNJ 48816274 - AdisInsight".
  21. "Lorediplon - Ferrer - AdisInsight".
  22. "MK 1064 - AdisInsight".
  23. "Research programme: Psychophysiological insomnia therapeutics - Neurim Pharmaceuticals - AdisInsight".
  24. "Zolpidem topical gel - Tritech Biopharmaceuticals - AdisInsight".
  25. "ACT 462206 - AdisInsight".
  26. "Adipiplon - AdisInsight".
  27. "ADX 10061 - AdisInsight".
  28. Eder DN (February 2002). "CEE-03-310 CeNeS pharmaceuticals". Curr Opin Investig Drugs. 3 (2): 284–288. PMID   12020061. CEE-03-310 is a selective dopamine D1-like receptor antagonist with no appreciable binding affinity for other receptors. Although originally developed by Novo Nordisk A/S as NNC-687 for the treatment of schizophrenia, the company changed its therapeutic focus in the mid-1990s and the full rights to CEE-03-310 and several related compounds were subsequently granted to CeNeS Pharmaceuticals in 1999. CeNeS is currently investigating the drug's potential in the treatment of insomnia and alcohol dependency [340965], [382293], [401496],[416026]. A phase II, double-blind, placebo-controlled trial of CEE-03-310 demonstrated a dose-dependent enhancement of NREM sleep at the beginning of the night without any effects on the quantity of REM sleep [410739].
  29. Eder DN, Zdravkovic M, Wildschiødtz G (2003). "Selective alterations of the first NREM sleep cycle in humans by a dopamine D1 receptor antagonist (NNC-687)". J Psychiatr Res. 37 (4): 305–312. doi:10.1016/s0022-3956(03)00007-4. PMID   12765853.
  30. "Almorexant - AdisInsight".
  31. "ANPH 101 - AdisInsight".
  32. "Atagabalin - AdisInsight".
  33. "Eplivanserin - AdisInsight".
  34. "Esmirtazapine - AdisInsight".
  35. "Gaboxadol - Lundbeck A/S - AdisInsight".
  36. "GT 2203 - AdisInsight".
  37. "Delving into the Latest Updates on Indiplon with Synapse".
  38. "Indiplon: Indiplon modified-release, Indiplon MR, NBI 34060, NBI 34060 modified-release, NBI 34060 MR". Drugs in R&D. 3 (3): 197–199. 2002. doi:10.2165/00126839-200203030-00012. ISSN   1174-5886. PMID   12099167 . Retrieved 17 September 2025.
  39. "Nabilone - AdisInsight".
  40. "NBI 75043 - AdisInsight".
  41. "Nelotanserin - Sio Gene Therapies - AdisInsight".
  42. "NGD 962 - AdisInsight".
  43. "Paliperidone - Johnson & Johnson - AdisInsight".
  44. "PD 0299685 - AdisInsight".
  45. "Remimazolam tosylate - Jiangsu Hengrui Medicine - AdisInsight".
  46. "Suvecaltamide - Merck & Co - AdisInsight".
  47. "Tesamorelin - Theratechnologies - AdisInsight".
  48. "Triazolam intranasal - Fabre Kramer - AdisInsight".
  49. "Volinanserin - AdisInsight".
  50. "Dimdazenil - Evotec/Zhejiang Jingxin Pharmaceutical - AdisInsight".
  51. "Quazepam - AdisInsight".
  52. 1 2 "Drugs for chronic insomnia". Med Lett Drugs Ther. 65 (1667): 1–6. January 2023. doi:10.58347/tml.2023.1667a. PMID   36630579.
  53. "Eszopiclone - Sumitomo Pharma America - AdisInsight".
  54. "Zaleplon - Pfizer - AdisInsight".
  55. "Zolpidem extended release - Cosette Pharmaceuticals/Sanofi-aventis - AdisInsight".
  56. "Zolpidem oral spray - Amherst Pharmaceuticals - AdisInsight".
  57. "Daridorexant - Idorsia Pharmaceuticals - AdisInsight".
  58. "Lemborexant - Eisai - AdisInsight".
  59. "Suvorexant - Merck & Co - AdisInsight".
  60. "Melatonin controlled-release - Neurim Pharmaceuticals - AdisInsight".
  61. "Ramelteon - Takeda - AdisInsight".
  62. "Cannabidiol/Tetrahydrocannabinol - Zelira Therapeutics - AdisInsight".
  63. Walsh JH, Maddison KJ, Rankin T, Murray K, McArdle N, Ree MJ, Hillman DR, Eastwood PR (November 2021). "Treating insomnia symptoms with medicinal cannabis: a randomized, crossover trial of the efficacy of a cannabinoid medicine compared with placebo". Sleep. 44 (11) zsab149. doi:10.1093/sleep/zsab149. PMC   8598183 . PMID   34115851.
  64. "Doxepin low dose - Somaxon Pharmaceuticals - AdisInsight".
  65. Krystal AD (December 2015). "New Developments in Insomnia Medications of Relevance to Mental Health Disorders". The Psychiatric Clinics of North America. 38 (4): 843–860. doi:10.1016/j.psc.2015.08.001. PMC   5972036 . PMID   26600112.
  66. 1 2 3 4 5 6 7 Atkin T, Comai S, Gobbi G (April 2018). "Drugs for Insomnia beyond Benzodiazepines: Pharmacology, Clinical Applications, and Discovery". Pharmacological Reviews. 70 (2): 197–245. doi: 10.1124/pr.117.014381 . PMID   29487083. S2CID   3578916.
  67. Naguy A (2016). "Clonidine Use in Psychiatry: Panacea or Panache". Pharmacology. 98 (1–2): 87–92. doi:10.1159/000446441. PMID   27161101. Moreover, clonidine helps in the treatment of neuroleptic-induced akathisia, stimulant-induced insomnia and clozapine-induced sialorrhea. Moreover, clonidine seems to be an attractive option targeting insomnia in ADHD [10] and remain a good remedy for paediatric insomnia in general [10] , and a case series has also reported that clonidine seems to be beneficial and fairly well tolerated in intractable sleep disorders in children and young adults with neurodevelopmental disorders [11] .
  68. Bamgbade OA, Tai-Osagbemi J, Bamgbade DO, Murphy-Akpieyi O, Fadire A, Soni NK, Mumporeze L (June 2022). "Clonidine is better than zopiclone for insomnia treatment in chronic pain patients". J Clin Sleep Med. 18 (6): 1565–1571. doi:10.5664/jcsm.9930. PMC   9163629 . PMID   35112665.
  69. Nguyen M, Tharani S, Rahmani M, Shapiro M (March 2014). "A review of the use of clonidine as a sleep aid in the child and adolescent population". Clin Pediatr (Phila). 53 (3): 211–216. doi:10.1177/0009922813502123. PMID   24027233.
  70. Wilens TE, Biederman J, Spencer T (1994). "Clonidine for sleep disturbances associated with attention-deficit hyperactivity disorder". J Am Acad Child Adolesc Psychiatry. 33 (3): 424–426. doi:10.1097/00004583-199403000-00018. PMID   8169189.
  71. Ordak M, Galazka A, Nasierowski T, Muszynska E, Bujalska-Zadrozny M (April 2023). "Reasons, Form of Ingestion and Side Effects Associated with Consumption of Amanita muscaria". Toxics. 11 (4): 383. Bibcode:2023Toxic..11..383O. doi: 10.3390/toxics11040383 . PMC   10142736 . PMID   37112610.
  72. Hartwig J, Kendrick J, Ahmad G, Cook J, Matthews DB, Sharma P (2025). "Exploring User Experiences with Amanita muscaria: A Thematic Analysis of Reddit Online Forum Discussions". Subst Use Misuse. 60 (7): 952–961. doi:10.1080/10826084.2025.2476141. PMID   40057818.
  73. King JD (January 2025). "Promethazine is not a good option to aid sleep quality, especially for people using psychiatric services". BJPsych Bull: 1–3. doi:10.1192/bjb.2024.108. PMID   39758034.
  74. Ried K, Tamanna T, Matthews S, Sali A (June 2023). "Medicinal cannabis improves sleep in adults with insomnia: a randomised double-blind placebo-controlled crossover study". J Sleep Res. 32 (3) e13793. doi:10.1111/jsr.13793. PMID   36539991.
  75. Memi E, Pavli P, Papagianni M, Vrachnis N, Mastorakos G (August 2024). "Diagnostic and therapeutic use of oral micronized progesterone in endocrinology". Rev Endocr Metab Disord. 25 (4): 751–772. doi:10.1007/s11154-024-09882-0. PMC   11294403 . PMID   38652231.
  76. Sutanto CN, Loh WW, Kim JE (January 2022). "The impact of tryptophan supplementation on sleep quality: a systematic review, meta-analysis, and meta-regression". Nutr Rev. 80 (2): 306–316. doi:10.1093/nutrit/nuab027. PMID   33942088.
  77. Maffei ME (December 2020). "5-Hydroxytryptophan (5-HTP): Natural Occurrence, Analysis, Biosynthesis, Biotechnology, Physiology and Toxicology". Int J Mol Sci. 22 (1): 181. doi: 10.3390/ijms22010181 . PMC   7796270 . PMID   33375373.