Product Name

Lorcaserin Hydrochloride

CAS Number


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Product Name:
Lorcaserin Hydrochloride
CAS Number:
For the treatment of obesity, as an adjunct to a reduced-calorie diet and increased physical activity.
Mode of Action:

Although the exact mechanism is unknown, it is believed to involve the selective activation of 5-HT2C receptors in the anorexigenic pro-opiomelanocortin neurons in the arcuate nucleus of the hypothalamus. This results in decreased food intake and satiety by promoting the release of alpha-melanocortin stimulating hormone, which acts on melanocortin-4 receptors.


Lorcaserin produced a dose-dependent weight loss over a 12-week period by promoting satiety and decreasing food consumption.


Lorcaserin has extensive hepatic metabolism producing inactive compounds. Lorcaserin sulfamate (M1) is the major metabolite circulating in the plasma, and N-carbamoyl glucuronide lorcaserin (M5) is the major metabolite in urine. Other minor metabolites that are both excreted in urine are glucuronide or sulfate conjugates.


Most common adverse reactions include hypoglycemia (diabetic patients), headache, back pain, fatigue, decrease in lymphocytes, upper respiratory tract infection, and nasopharyngitis. Moreover, the safety and efficacy of coadministration with other weight loss products has not been established, and cardiovascular effects on mortality and morbidity have not been established.

(1R)-8-Chloro-2,3,4,5-tetrahydro-1-methyl-1H-3-benzazepinehydrochloride, APD 356, APD-356, APD356, Belviq, Lorcaserin hydrochloride, Lorqess, UNII-0QJF08GDPE
General Reference:
General Reference:

  1. Halford JC: Obesity drugs in clinical development. Curr Opin Investig Drugs. 2006 Apr;7(4):312-8. Pubmed
  2. Smith BM, Smith JM, Tsai JH, Schultz JA, Gilson CA, Estrada SA, Chen RR, Park DM, Prieto EB, Gallardo CS, Sengupta D, Dosa PI, Covel JA, Ren A, Webb RR, Beeley NR, Martin M, Morgan M, Espitia S, Saldana HR, Bjenning C, Whelan KT, Grottick AJ, Menzaghi F, Thomsen WJ: Discovery and structure-activity relationship of (1R)-8-chloro-2, 3, 4, 5-tetrahydro-1-methyl-1H-3-benzazepine (Lorcaserin), a selective serotonin 5-HT2C receptor agonist for the treatment of obesity. J Med Chem. 2008 Jan 24;51(2):305-13. Epub 2007 Dec 21. Pubmed

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