Chemical Component Summary

FormulaC20 H24 N2 O2
Molecular Weight324.42
Isomeric SMILESCOc1ccc2nccc([C@H](O)[C@H]3C[C@@H]4CC[N@]3C[C@@H]4C=C)c2c1

Chemical Details

Formal Charge0
Atom Count48
Chiral Atom Count5
Chiral AtomsC10, C11, C13, C17, N1
Bond Count51
Aromatic Bond Count11
Leaving Atomsn/a

Drug Info: DrugBank

DrugBank IDDB00908 Different stereochemistry
DescriptionAn optical isomer of quinine, extracted from the bark of the Cinchona tree and similar plant species. This alkaloid dampens the excitability of cardiac and skeletal muscles by blocking sodium and potassium currents across cellular membranes. It prolongs cellular action potential, and decreases automaticity. Quinidine also blocks muscarinic and alpha-adrenergic neurotransmission. [PubChem]
  • (+)-quinidine
  • (8R,9S)-Quinidine
  • (R)-(6-Methoxyquinolin-4-yl)((3S,4R,7S)-3-vinylquinuclidin-7-yl)methanol
  • (S)-(6-Methoxy-quinolin-4-yl)-((2R,5R)-5-vinyl-1-aza-bicyclo[2.2.2]oct-2-yl)-methanol
  • (S)-(6-Methoxyquinolin-4-yl)((2R,5R)-5-vinylquinuclidin-2-yl)methanol
  • Quinidine gluconate
  • Quinidine hydrochloride
  • Quinidine polygalacturonate
  • Quinidine sulfate
Brand Names
  • Apo Quinidine Tab 200mg
  • Apo-quin-G Tab 325mg
  • Cardioquin Tablets
  • Novo-quinidin 200mg
  • Nuedexta
Affected OrganismHumans and other mammals
IndicationFor the treatment of ventricular pre-excitation and cardiac dysrhythmias
PharmacologyQuinidine, a hydantoin anticonvulsant, is used alone or with phenobarbital or other anticonvulsants to manage tonic-clonic seizures, psychomotor seizures, neuropathic pain syndromes including diabetic neuropathy, digitalis-induced cardiac arrhythmias, and cardiac arrhythmias associated with QT-interval prolongation.
Mechanism of actionQuinidine acts on sodium channels on the neuronal cell membrane, limiting the spread of seizure activity and reducing seizure propagation. The antiarrhythmic actions are mediated through effects on sodium channels in Purkinje fibers. Quinidine may also act on the slow inward calcium current (ICa), the rapid (IKr) and slow (IKs) components of the delayed potassium rectifier current, the inward potassium rectifier current (IKI), the ATP-sensitive potassium channel (IKATP) and Ito.
Route of administration
  • Intramuscular
  • Intramuscular; Intravenous
  • Intravenous
  • Oral
  • Adrenergic Agents
  • Adrenergic alpha-Antagonists
  • Adrenergic Antagonists
  • Alkaloids
  • Anti-Arrhythmia Agents
  • C01BA01
  • C01BA51
  • C01BA71
CAS number56-54-2
Drug Info/Drug Targets: DrugBank 3.0: a comprehensive resource for 'omics' research on drugs. Knox C, Law V, Jewison T, Liu P, Ly S, Frolkis A, Pon A, Banco K, Mak C, Neveu V, Djoumbou Y, Eisner R, Guo AC, Wishart DS. Nucleic Acids Res. 2011 Jan; 39 (Database issue):D1035-41. | PMID:21059682