Clinical data
Other namesDimeditiapramine; Ro 11-1781
  • 2-(3,4-Dimethoxyphenyl)-2-(3-{[2-(3,4-dimethoxyphenyl)ethyl]methylamino}propyl)-1λ6,3λ6-dithiane-1,1,3,3-tetrone
CAS Number
PubChem CID
CompTox Dashboard (EPA)
ECHA InfoCard100.054.992 Edit this at Wikidata
Chemical and physical data
Molar mass555.70 g·mol−1
3D model (JSmol)
  • CN(CCCC1(S(=O)(=O)CCCS1(=O)=O)C2=CC(=C(C=C2)OC)OC)CCC3=CC(=C(C=C3)OC)OC

Tiapamil (INN; also known as dimeditiapramine) is a calcium antagonist or calcium channel blocker.[1][2] It is an experimental drug that has never been marketed.[3]

Tiapamil has been described as an antianginal agent. It exhibits properties of anti-arrhythmic medications. These are medications that are used to treat unusually fast or irregular heartbeats. Examples of arrhytmthic conditions include atrial fibrillation, atrial flutter, and super-ventricular tachycardia.[4] Upon research, the drug shows promising effects on treatment of these condition. Research seeks to create a treatment with tiapamil in order to mitigate the side effects of the more commonly prescribed calcium antagonist and anti-hypertensive verapamil. The two drugs have similar properties; however, tiapamil appears to treat arrhythmic conditions without many of the hypotensive, negative inotropic, and negative chronotropic side effects. Tiapamil is a calcium channel blocker that acts on the slow calcium channels. It can treat ventricular arrhythmias to a higher degree than traditional calcium antagonists.[medical citation needed]

See also


  1. ^ Cocco G, Strozzi C, Chu D (June 1979). "Human electropharmacology of the calcium antagonist dimeditiapramine (Ro 11-1781) in coronary patients". Clinical Cardiology. 2 (3): 212–216. doi:10.1002/clc.4960020307. PMID 509799. S2CID 24609271.
  2. ^ Nowak FG, Cocco G, Chu D, Gasser DF (December 1980). "Antiarrhythmic effect of the calcium antagonist tiapamil (Ro 11-1781) by intravenous administration in patients with coronary heart disease". Clinical Cardiology. 3 (6): 371–376. doi:10.1002/clc.4960030603. PMID 6161729. S2CID 196402596.
  3. ^ "Tiapamil". AdisInsight. Springer Nature Switzerland AG.
  4. ^ Cocco G, Chu D, Strozzi C (April 1979). "Dimeditiapramine (Ro 11-1781), a new calcium antagonist, in the management of supraventricular tachyarrhythmias in patients with acute myocardial infarction". Clinical Cardiology. 2 (2): 131–134. doi:10.1002/clc.4960020208. PMID 262567. S2CID 38589956.