Clinical data
Synonyms CPC-10997; Cyoctol; Ethocyn; X-Andron
Routes of
By mouth, topical
Drug class Nonsteroidal antiandrogen
ATC code
  • None
CAS Number
PubChem CID
Chemical and physical data
Formula C16H28O2
Molar mass 252.39232 g/mol
3D model (JSmol)

Cioteronel (INN, USAN) (developmental code name CPC-10997; former tentative brand names Cyoctol, Ethocyn, X-Andron) is a nonsteroidal antiandrogen (NSAA) that was never marketed.[1][2][3] It was under development between 1989 and 2001 for the topical treatment of androgenetic alopecia (male pattern baldness) and acne and for the oral treatment of benign prostatic hyperplasia; it reached phase III clinical trials for acne and phase II studies for androgenetic alopecia, but was ultimately discontinued due to poor efficacy.[3][4]

See also


  1. C.R. Ganellin; David J. Triggle (21 November 1996). Dictionary of Pharmacological Agents. CRC Press. pp. 570–. ISBN 978-0-412-46630-4.
  2. Daniel Lednicer (21 November 1994). The Organic Chemistry of Drug Synthesis. John Wiley & Sons. pp. 11–. ISBN 978-0-471-58959-4.
  3. 1 2 Tiwari, Atul; Krishna, N S; Nanda, Kamna; Chugh, Anita (2005). "Benign prostatic hyperplasia: an insight into current investigational medical therapies". Expert Opinion on Investigational Drugs. 14 (11): 1359–1372. doi:10.1517/13543784.14.11.1359. ISSN 1354-3784.

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