Flecainide acetate

    WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 326768

CAS#: 54143-56-5 (acetate)

Description: Flecainide is a class Ic antiarrhythmic agent used to prevent and treat tachyarrhythmias (abnormal fast rhythms of the heart). It is used to treat a variety of cardiac arrhythmias including paroxysmal atrial fibrillation (episodic irregular heartbeat originating in the upper chamber of the heart), paroxysmal supraventricular tachycardia (episodic rapid but regular heartbeat originating in the atrium), and ventricular tachycardia[citation needed] (rapid rhythms of the lower chambers of the heart). Flecainide works by regulating the flow of sodium in the heart, causing prolongation of the cardiac action potential.

Chemical Structure

Flecainide acetate
CAS# 54143-56-5 (acetate)

Theoretical Analysis

MedKoo Cat#: 326768
Name: Flecainide acetate
CAS#: 54143-56-5 (acetate)
Chemical Formula: C19H24F6N2O5
Exact Mass: 0.00
Molecular Weight: 474.400
Elemental Analysis: C, 48.10; H, 5.10; F, 24.03; N, 5.91; O, 16.86

Price and Availability

Size Price Availability Quantity
100mg USD 450 2 weeks
250mg USD 950 2 Weeks
500mg USD 1650 2 weeks
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Related CAS #: 54143-56-5 (acetate)   54143-55-4 (free base)    

Synonym: R 818; R-818; R818; Flecainide acetate; trade name Tambocor; Almarytm, Apocard, Ecrinal, and Flécaine

IUPAC/Chemical Name: N-(2-Piperidylmethyl)-2,5-bis-(2,2,2-trifluoroethoxy)benzamide acetate


InChi Code: InChI=1S/C17H20F6N2O3.C2H4O2/c18-16(19,20)9-27-12-4-5-14(28-10-17(21,22)23)13(7-12)15(26)25-8-11-3-1-2-6-24-11;1-2(3)4/h4-5,7,11,24H,1-3,6,8-10H2,(H,25,26);1H3,(H,3,4)


Appearance: Solid powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO

Shelf Life: >2 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

More Info:

Biological target:
In vitro activity:
In vivo activity:

Preparing Stock Solutions

The following data is based on the product molecular weight 474.40 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL
Formulation protocol:
In vitro protocol:
In vivo protocol:

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1: Benoit A, Paolucci M, Stefan L, Vanderperren O, Hoffer E. [A CASE OF FLECAINIDE INTOXICATION]. Rev Med Liege. 2015 Sep;70(9):442-5. Review. French. PubMed PMID: 26638444.

2: Tamargo J, Le Heuzey JY, Mabo P. Narrow therapeutic index drugs: a clinical pharmacological consideration to flecainide. Eur J Clin Pharmacol. 2015 May;71(5):549-67. doi: 10.1007/s00228-015-1832-0. Epub 2015 Apr 15. Review. PubMed PMID: 25870032; PubMed Central PMCID: PMC4412688.

3: Andrikopoulos GK, Pastromas S, Tzeis S. Flecainide: Current status and perspectives in arrhythmia management. World J Cardiol. 2015 Feb 26;7(2):76-85. doi: 10.4330/wjc.v7.i2.76. Review. PubMed PMID: 25717355; PubMed Central PMCID: PMC4325304.

4: Apostolakis S, Oeff M, Tebbe U, Fabritz L, Breithardt G, Kirchhof P. Flecainide acetate for the treatment of atrial and ventricular arrhythmias. Expert Opin Pharmacother. 2013 Feb;14(3):347-57. doi: 10.1517/14656566.2013.759212. Epub 2013 Jan 7. Review. PubMed PMID: 23294160.

5: Liu N, Napolitano C, Venetucci LA, Priori SG. Flecainide and antiarrhythmic effects in a mouse model of catecholaminergic polymorphic ventricular tachycardia. Trends Cardiovasc Med. 2012 Feb;22(2):35-9. doi: 10.1016/j.tcm.2012.06.008. Epub 2012 Aug 4. Review. PubMed PMID: 22867967.

6: Tamargo J, Capucci A, Mabo P. Safety of flecainide. Drug Saf. 2012 Apr 1;35(4):273-89. doi: 10.2165/11599950-000000000-00000. Review. PubMed PMID: 22435343.

7: Pott C, Dechering DG, Reinke F, Muszynski A, Zellerhoff S, Bittner A, Köbe J, Wasmer K, Schulze-Bahr E, Mönnig G, Kotthoff S, Eckardt L. Successful treatment of catecholaminergic polymorphic ventricular tachycardia with flecainide: a case report and review of the current literature. Europace. 2011 Jun;13(6):897-901. doi: 10.1093/europace/euq517. Epub 2011 Feb 2. Review. PubMed PMID: 21292648.

8: Aliot E, Capucci A, Crijns HJ, Goette A, Tamargo J. Twenty-five years in the making: flecainide is safe and effective for the management of atrial fibrillation. Europace. 2011 Feb;13(2):161-73. doi: 10.1093/europace/euq382. Epub 2010 Dec 7. Review. PubMed PMID: 21138930; PubMed Central PMCID: PMC3024037.

9: Camm AJ, Savelieva I. Some patients with paroxysmal atrial fibrillation should carry flecainide or propafenone to self treat. BMJ. 2007 Mar 24;334(7594):637. Review. PubMed PMID: 17379911; PubMed Central PMCID: PMC1832060.

10: Argall J, Crawford I. Best evidence topic report. Amiodarone or flecainide for cardioversion in acute onset atrial fibrillation. Emerg Med J. 2004 Mar;21(2):199. Review. PubMed PMID: 14988348; PubMed Central PMCID: PMC1726303.

11: Khan IA. Oral loading single dose flecainide for pharmacological cardioversion of recent-onset atrial fibrillation. Int J Cardiol. 2003 Feb;87(2-3):121-8. Review. PubMed PMID: 12559528.

12: Robain A, Perchet H, Fuhrman C. Flecainide-associated pneumonitis with acute respiratory failure in a patient with the LEOPARD syndrome. Acta Cardiol. 2000 Feb;55(1):45-7. Review. PubMed PMID: 10707759.

13: Maury P, Vuille C, Metzger J, Veragut B, Schoenenberger I, Elamly A, Chevrolet JC. [Severe flecainide acetate poisoning. Apropos of a case]. Arch Mal Coeur Vaiss. 1999 Feb;92(2):273-7. Review. French. PubMed PMID: 10078349.

14: Bordier P, Garrigue S, Clémenty J. [Flecainide acetate]. Ann Cardiol Angeiol (Paris). 1996 May;45(5):263-79. Review. French. PubMed PMID: 8763646.

15: Paperini L, Davini A, Lattanzi F, Topi A, Reisenhofer B, Squarcini G, Paci A, Topi PL. [Propafenone and flecainide in the therapy of ventricular arrhythmias]. Minerva Cardioangiol. 1995 Oct;43(10):449-57. Review. Italian. PubMed PMID: 8819814.

16: Falk RH, Fogel RI. Flecainide. J Cardiovasc Electrophysiol. 1994 Nov;5(11):964-81. Review. PubMed PMID: 7889236.

17: Randazzo DN, Schweitzer P, Stein E, Banas JS Jr, Winters SL. Flecainide induced atrial tachycardia with 1:1 ventricular conduction during exercise testing. Pacing Clin Electrophysiol. 1994 Sep;17(9):1509-14. Review. PubMed PMID: 7991422.

18: Malik R, Ellenbogen KA, Stambler BS, Wood MA. Flecainide: its value and danger. Heart Dis Stroke. 1994 Mar-Apr;3(2):85-9. Review. PubMed PMID: 8199770.

19: Perry JC, Garson A Jr. Flecainide acetate for treatment of tachyarrhythmias in children: review of world literature on efficacy, safety, and dosing. Am Heart J. 1992 Dec;124(6):1614-21. Review. PubMed PMID: 1462922.

20: Crozier I. Flecainide in the Wolff-Parkinson-White syndrome. Am J Cardiol. 1992 Aug 20;70(5):26A-32A. Review. PubMed PMID: 1509995.