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Systematic (IUPAC) name
CAS Number 282526-98-1
ATC code none
PubChem CID 9952916
Chemical data
Formula C25H39NO3
Molar mass 401.582 g/mol[[Script error: No such module "String".]]
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Cetilistat is a drug designed to treat obesity. It acts in the same way as the older drug orlistat (Xenical) by inhibiting pancreatic lipase, an enzyme that breaks down triglycerides in the intestine. Without this enzyme, triglycerides from the diet are prevented from being hydrolyzed into absorbable free fatty acids and are excreted undigested.[1]

In human trials, cetilistat was shown to produce similar weight loss to orlistat, but also produced similar side effects such as oily, loose stools, fecal incontinence, frequent bowel movements, and flatulence.[2][3] It is likely that the same precautions would apply in that absorption of fat-soluble vitamins and other fat-soluble nutrients may be inhibited, requiring vitamin supplements to be used to avoid deficiencies.

Cettilistat has completed Phase 1 and 2 trials in the West and is currently in Phase 3 trials in Japan where it is partenered with Takeda.[4] Norgina BV has now acquired the full global rights to Cettilistat from Alizyme after the latter went into administration.[5]

See also

Anti-obesity medication


  1. Yamada Y, Kato T, Ogino H, Ashina S, Kato K. Cetilistat (ATL-962), a novel pancreatic lipase inhibitor, ameliorates body weight gain and improves lipid profiles in rats. Hormone and Metabolic Research. 2008 Aug;40(8):539-43. PMID 18500680
  2. Kopelman P, Bryson A, Hickling R, Rissanen A, Rossner S, Toubro S, Valensi P. Cetilistat (ATL-962), a novel lipase inhibitor: a 12-week randomized, placebo-controlled study of weight reduction in obese patients. International Journal of Obesity (London). 2007 Mar;31(3):494-9. PMID 16953261
  3. Padwal R. Cetilistat, a new lipase inhibitor for the treatment of obesity. Current Opinion in Investigational Drugs. 2008 Apr;9(4):414-21. PMID 18393108
  4. http://www.alizyme.com/alizyme/products/cetilistat/
  5. http://www.norgine.com/downloads/pr_archive/Norgine%20aquires%20cetilistat_2.pdf