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| Routes of administration | IV |
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| Formula | C19H27N5O5 |
| Molar mass | 405.455 g·mol−1 |
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Nifekalant (INN) is a class III antiarrhythmic agent approved in Japan for the treatment of arrhythmias and ventricular tachycardia. [1] It has the brand name Shinbit.
Propafenone, sold under the brand name Rythmol among others, is a class 1c anti-arrhythmic medication, which is used to treat illnesses associated with rapid heart beat such as atrial and ventricular arrhythmias.
Antiarrhythmic agents, also known as cardiac dysrhythmia medications, are a class of drugs that are used to suppress abnormally fast rhythms (tachycardias), such as atrial fibrillation, supraventricular tachycardia and ventricular tachycardia.
Dofetilide is a class III antiarrhythmic agent. It is marketed under the trade name Tikosyn by Pfizer, and is available in the United States in capsules containing 125, 250, and 500 µg of dofetilide. It is not available in Europe or Australia.
Proarrhythmia is a new or more frequent occurrence of pre-existing arrhythmias, paradoxically precipitated by antiarrhythmic therapy, which means it is a side effect associated with the administration of some existing antiarrhythmic drugs, as well as drugs for other indications. In other words, it is a tendency of antiarrhythmic drugs to facilitate emergence of new arrhythmias.
Tocainide (Tonocard) is a class Ib antiarrhythmic agent. It is no longer sold in the United States.
Ibutilide is a Class III antiarrhythmic agent that is indicated for acute cardioconversion of atrial fibrillation and atrial flutter of a recent onset to sinus rhythm. It exerts its antiarrhythmic effect by induction of slow inward sodium current, which prolongs action potential and refractory period of myocardial cells. Because of its Class III antiarrhythmic activity, there should not be concomitant administration of Class Ia and Class III agents.
Prajmaline (Neo-gilurythmal) is a class Ia antiarrhythmic agent which has been available since the 1970s. Class Ia drugs increase the time one action potential lasts in the heart. Prajmaline is a semi-synthetic propyl derivative of ajmaline, with a higher bioavailability than its predecessor. It acts to stop arrhythmias of the heart through a frequency-dependent block of cardiac sodium channels.
Bunaftine is an antiarrhythmic agent. It is classified in class III.
Dronedarone, sold under the brand name Multaq, is a class III antiarrhythmic medication developed by Sanofi-Aventis. It was approved by the FDA on July 2, 2009. Besides being indicated in arrhythmias, it was recommended as an alternative to amiodarone for the treatment of atrial fibrillation and atrial flutter in people whose hearts have either returned to normal rhythm or who undergo drug therapy or electric shock treatment i.e. direct current cardioversion (DCCV) to maintain normal rhythm. It is a class III antiarrhythmic drug. In the United States, the FDA approved label includes a claim for reducing hospitalization, but not for reducing mortality, as a reduction in mortality was not demonstrated in the clinical development program. A trial of the drug in heart failure was stopped as an interim analysis showed a possible increase in heart failure deaths, in patients with moderate to severe CHF.
Tedisamil (3,7-dicyclopropylmethyl-9,9-tetramethylene-3,7-diazabicyclo-3,3,1-nonane) is an experimental class III antiarrhythmic agent currently being investigated for the treatment of atrial fibrillation. Tedisamil blocks multiple types of potassium channels in the heart resulting in slowed heart rate. While the effects of tedisamil have been demonstrated in both atrial and ventricular muscle, repolarization is prolonged more efficiently in the atria. Tedisamil is administered intravenously and has a half-life of approximately 8 –13 hours in circulation. Tedisamil is being developed as an alternative to other antiarrhythmics as incidence of additional arrhythmic events is lower compared to other class III agents. Tedisamil also has significant anti-ischemic properties and was initially investigated as a potential treatment for angina until its antiarrhythmic effects were discovered. Tedisamil is manufactured by Solvay Pharmaceuticals Inc. under the proposed trade name Pulzium.
Vernakalant is a class III antiarrhythmic drug for the acute conversion of atrial fibrillation, a kind of irregular heartbeat, in form of an intravenous infusion. It has been approved for use in the European Union and the UK since 2010. The US Food and Drug Administration denied approval in 2008 and 2019.
Pilsicainide (INN) is an antiarrhythmic agent. It is marketed in Japan as サンリズム (Sunrythm). It was developed by Suntory Holdings Limited and first released in 1991. The JAN applies to the hydrochloride salt, pilsicainide hydrochloride.
Sodium channel blockers are drugs which impair the conduction of sodium ions (Na+) through sodium channels.
Potassium channel blockers are agents which interfere with conduction through potassium channels.
Clocinizine is a first-generation antihistamine of the diphenylmethylpiperazine class. It is marketed in Spain in combination with phenylpropanolamine under the brand name Senioral.
Moracizine or moricizine, sold under the trade name Ethmozine, is an antiarrhythmic of class IC. It was used for the prophylaxis and treatment of serious and life-threatening ventricular arrhythmias, but was withdrawn in 2007 for commercial reasons.
E-4031 is an experimental class III antiarrhythmic drug that blocks potassium channels of the hERG-type.
BRL-32872 is an experimental drug candidate that provides a novel approach to the treatment of cardiac arrhythmia. Being a derivative of verapamil, it possesses the ability to inhibit Ca+2 membrane channels. Specific modifications in hydrogen bonding activity, nitrogen lone pair availability, and molecular flexibility allow BRL-32872 to inhibit K+ channels as well. As such, BRL-32872 is classified as both a class III (K+ blocking) and class IV (Ca+2 blocking) antiarrhythmic agent.
Celivarone is an experimental drug being tested for use in pharmacological antiarrhythmic therapy. Cardiac arrhythmia is any abnormality in the electrical activity of the heart. Arrhythmias range from mild to severe, sometimes causing symptoms like palpitations, dizziness, fainting, and even death. They can manifest as slow (bradycardia) or fast (tachycardia) heart rate, and may have a regular or irregular rhythm.
Almokalant is a drug used to treat arrhythmia. It is a potassium channel blocker. It has been found to have teratogenic effects in rats.
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