Clinical data
Routes of
By mouth
ATC code none
Legal status
Legal status
  • Uncontrolled
Pharmacokinetic data
Excretion Urine (32%), Feces (51%)
Synonyms CJ-11,974; (2S,3S)-2-Diphenylmethyl-3-[(5-isopropyl-2-methoxybenzyl)amino]quinuclidine[1]
CAS Number 147116-64-1
PubChem (CID) 188927
ChemSpider 164166
Chemical and physical data
Formula C31H38N2O
Molar mass 454.65 g/mol
3D model (Jmol) Interactive image

Ezlopitant (INN,[1] code name CJ-11,974) is an NK1 receptor antagonist.[2][3][4] It has antiemetic and antinociceptive effects.[5][6] Pfizer was developing ezlopitant for the treatment of irritable bowel syndrome but it appears to have been discontinued.[2]

See also


  1. 1 2 "International Nonproprietary Names for Pharmaceutical Substances (INN). Recommended International Nonproprietary Names: List 44" (PDF). World Health Organization. pp. 194–5. Retrieved 17 November 2016.
  2. 1 2 Evangelista S (October 2001). "Eziopitant. Pfizer". Current Opinion in Investigational Drugs (London, England : 2000). 2 (10): 1441–3. PMID 11890362.
  3. Diemunsch P, Grélot L (September 2000). "Potential of substance P antagonists as antiemetics". Drugs. 60 (3): 533–46. doi:10.2165/00003495-200060030-00002. PMID 11030465.
  4. Giardina GA, Gagliardi S, Martinelli M (August 2003). "Antagonists at the neurokinin receptors--recent patent literature". IDrugs : the Investigational Drugs Journal. 6 (8): 758–72. PMID 12917772.
  5. Tsuchiya M, Fujiwara Y, Kanai Y, et al. (November 2002). "Anti-emetic activity of the novel nonpeptide tachykinin NK1 receptor antagonist ezlopitant (CJ-11,974) against acute and delayed cisplatin-induced emesis in the ferret". Pharmacology. 66 (3): 144–52. doi:10.1159/000063796. PMID 12372904.
  6. Tsuchiya M, Sakakibara A, Yamamoto M (January 2005). "A tachykinin NK1 receptor antagonist attenuates the 4 beta-phorbol-12-myristate-13-acetate-induced nociceptive behaviour in the rat". European Journal of Pharmacology. 507 (1-3): 29–34. doi:10.1016/j.ejphar.2004.11.028. PMID 15659291.
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