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Skeletal formula
Ball-and-stick model of chlorphentermine
Clinical data
Other namesp-Chloro-α,α-dimethylphenethylamine
Routes of
Oral, Insufflated, Rectal
ATC code
Legal status
Legal status
Pharmacokinetic data
Elimination half-life40 hours
  • 1-(4-chlorophenyl)-2-methylpropan-2-amine
CAS Number
PubChem CID
CompTox Dashboard (EPA)
ECHA InfoCard100.006.651 Edit this at Wikidata
Chemical and physical data
Molar mass183.68 g·mol−1
3D model (JSmol)
  • Clc1ccc(cc1)CC(N)(C)C
  • InChI=1S/C10H14ClN/c1-10(2,12)7-8-3-5-9(11)6-4-8/h3-6H,7,12H2,1-2H3 checkY
 ☒NcheckY (what is this?)  (verify)

Chlorphentermine (trade names Apsedon, Desopimon, Lucofen) is a serotonergic appetite suppressant of the amphetamine family. Developed in 1962, it is the 4-chloro derivative of the better known appetite suppressant phentermine,[2] which is still in current use.

Chlorphentermine acts as a highly selective serotonin releasing agent (SRA).[3] It is not a psychostimulant and has little or no abuse potential, but is classed as a Schedule III drug in the USA due mainly to its similarity to other appetite suppressants such as diethylpropion which have been more widely abused. It is no longer used due mainly to safety concerns, as it has a serotonergic effects profile similar to other withdrawn appetite suppressants such as fenfluramine and aminorex which were found to cause pulmonary hypertension and cardiac fibrosis following prolonged use.[4]

The plasma half-life is about five days.[5] It was withdrawn from the market in the UK in 1974.[5]

See also[edit]


  1. ^ Anvisa (2023-03-31). "RDC Nº 784 - Listas de Substâncias Entorpecentes, Psicotrópicas, Precursoras e Outras sob Controle Especial" [Collegiate Board Resolution No. 784 - Lists of Narcotic, Psychotropic, Precursor, and Other Substances under Special Control] (in Brazilian Portuguese). Diário Oficial da União (published 2023-04-04). Archived from the original on 2023-08-03. Retrieved 2023-08-16.
  2. ^ Gylys JA, Hart JJ, Warren MR (September 1962). "Chlorphentermine, a new anorectic agent". The Journal of Pharmacology and Experimental Therapeutics. 137: 365–73. PMID 13903304.
  3. ^ Rothman RB, Baumann MH, Dersch CM, Romero DV, Rice KC, Carroll FI, Partilla JS (January 2001). "Amphetamine-type central nervous system stimulants release norepinephrine more potently than they release dopamine and serotonin". Synapse. 39 (1): 32–41. doi:10.1002/1098-2396(20010101)39:1<32::AID-SYN5>3.0.CO;2-3. PMID 11071707. S2CID 15573624.
  4. ^ Rothman RB, Ayestas MA, Dersch CM, Baumann MH (August 1999). "Aminorex, fenfluramine, and chlorphentermine are serotonin transporter substrates. Implications for primary pulmonary hypertension". Circulation. 100 (8): 869–75. doi:10.1161/01.cir.100.8.869. PMID 10458725.
  5. ^ a b Craddock D (1976). "Anorectic drugs: use in general practice". Drugs. 11 (5): 378–93. doi:10.2165/00003495-197611050-00002. PMID 782835. S2CID 25704474.