Clinical data
Synonyms L-tyrosyl-D-alanyl-L-phenylalanyl-D-alanyl-L-tyrosinamide
ATC code
  • None
CAS Number
PubChem CID
Chemical and physical data
Formula C33H40N6O7
Molar mass 632.707 g/mol
3D model (JSmol)

Casokefamide (INN), also known as β-casomorphin 4027 (β-CM-4027) and [D-Ala2,4,Tyr5]-β-casomorphin-5-amide, is a peripherally-specific, synthetic opioid pentapeptide with the amino acid sequence Tyr-D-Ala-Phe-D-Ala-Tyr-NH2.[1] Derived from the β-casomorphin sequence, it was designed with the intention of improving resistance to digestive enzymes so that it could be used as an antidiarrheal medicine.[1][2] Unlike other casomorphins, which are generally selective μ-opioid receptor agonists, casokefamide binds to both the μ- and δ-opioid receptors.[1] In a clinical study, casokefamide was found to be effective via the oral route for the treatment of chronic diarrhea, and did not produce any side effects.[2] However, further clinical development was not pursued and it was never marketed.

See also


  1. 1 2 3 Brantl V, Picone D, Amodeo P, Temussi PA (March 1993). "Solution structure of casokefamide". Biochemical and Biophysical Research Communications. 191 (3): 853–9. doi:10.1006/bbrc.1993.1295. PMID 8466524.
  2. 1 2 Schulte-Frohlinde E, Reindl W, Bierling D, et al. (March 2000). "Effects of oral casokefamide on plasma levels, tolerance, and intestinal transit in man". Peptides. 21 (3): 439–42. doi:10.1016/S0196-9781(00)00166-2. PMID 10793229.
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