Clinical data
Trade namesBaynas
AHFS/Drugs.comInternational Drug Names
Routes of
Oral (tablets)
ATC code
  • None
Legal status
Legal status
  • Rx-only (JP)
CAS Number
PubChem CID
CompTox Dashboard (EPA)
ECHA InfoCard100.159.668 Edit this at Wikidata
Chemical and physical data
Molar mass416.46 g/mol g·mol−1
3D model (JSmol)

Ramatroban (INN) (also known as Bay-u3405)[1] is a thromboxane receptor antagonist.[2]

It is also a DP2 receptor antagonist.[3]

It is indicated for the treatment of coronary artery disease.[4] It has also been used for the treatment of asthma.[5]

It was developed by the German pharmaceutical company Bayer AG and is co-marketed in Japan by Bayer and Nippon Shinyaku Co. Ltd. under the trade name Baynas.


  1. ^ "Ramatroban (compound)". PubChem. National Center for Biotechnology Information. Retrieved 22 June 2019.
  2. ^ Sugimoto H, Shichijo M, Iino T, et al. (April 2003). "An orally bioavailable small molecule antagonist of CRTH2, ramatroban (BAY u3405), inhibits prostaglandin D2-induced eosinophil migration in vitro". J. Pharmacol. Exp. Ther. 305 (1): 347–52. doi:10.1124/jpet.102.046748. PMID 12649388.
  3. ^ Royer JF, Schratl P, Carrillo JJ, et al. (September 2008). "A novel antagonist of prostaglandin D2 blocks the locomotion of eosinophils and basophils". Eur. J. Clin. Invest. 38 (9): 663–71. doi:10.1111/j.1365-2362.2008.01989.x. PMID 18837743.
  4. ^ Fiedler VB, Seuter F, Perzborn E (December 1990). "Effects of the novel thromboxane antagonist Bay U 3405 on experimental coronary artery disease" (PDF). Stroke. 21 (12 Suppl): IV149–51. PMID 2260140.
  5. ^ Endo S, Akiyama K (November 1996). "[Thromboxane A2 receptor antagonist in asthma therapy]". Nippon Rinsho (in Japanese). 54 (11): 3045–8. PMID 8950952.

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