Quinidine - Class IA Antiarrhythmic Medication for Heart Rhythm Stability

REF #: 3199412
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Quinidine – Class IA Antiarrhythmic Medication for Heart Rhythm Stability

  • Class IA antiarrhythmic: Promotes heart rhythm stability
  • Potassium channel blocker: Blocks sodium and potassium channels
  • Restores normal heart electrical activity: Regulates heart rate and rhythm

Quinidine is available as Quinidine sulfate salt dihydrate.

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    Hong Kong Hong Kong 3 years
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Quinidine - Class IA Antiarrhythmic Medication for Heart Rhythm Stability

Quinidine is a class IA antiarrhythmic medication that acts as a potassium channel blocker. It is primarily used for the treatment and prevention of various types of irregular heart rhythms.

Features and Benefits

  • Promotes heart rhythm stability: Quinidine works by blocking sodium and potassium channels in the heart, which helps to restore normal electrical activity and regulate heart rate and rhythm.
  • Blocks sodium and potassium channels: By blocking these channels, Quinidine interrupts the flow of ions involved in generating electrical signals in the heart. This helps to prevent abnormal heart rhythms such as ventricular tachycardia and atrial fibrillation.
  • Restores normal heart electrical activity: Quinidine helps to restore normal heart rhythm by modulating the electrical signals in the heart muscle cells.
  • Regulates heart rate and rhythm: By normalizing the electrical activity of the heart, Quinidine helps to regulate the heartbeat, ensuring that it beats in a regular and coordinated manner.


Quinidine is available as Quinidine sulfate salt dihydrate. It is chemically known as (9S)-6'-Methoxycinchonan-9-ol and has the molecular formula C20H24N2O2. The compound is a white crystalline powder that is soluble in water.


Quinidine is primarily used in the treatment of various arrhythmias, including:

  • Atrial fibrillation: Quinidine can help to restore and maintain normal heart rhythm in patients with atrial fibrillation, a condition characterized by rapid, irregular heartbeat.
  • Ventricular tachycardia: Quinidine is effective in treating ventricular tachycardia, a rapid heart rhythm originating from the ventricles.
  • Paroxysmal supraventricular tachycardia: Quinidine can be used to treat paroxysmal supraventricular tachycardia, a type of arrhythmia that originates above the ventricles.

Dosage and Administration

The dosage of Quinidine may vary depending on the specific condition being treated and the individual patient's response to the medication. It is important to follow the dosage instructions provided by a healthcare professional.

Quinidine is typically available in tablet form for oral administration. The tablets should be taken with a full glass of water and may be taken with or without food. It is important to take the medication at the same time(s) each day to maintain consistent blood levels.

Precautions and Side Effects

Quinidine should be used with caution in patients with certain medical conditions, including:

  • Heart disease
  • Liver disease
  • Kidney disease
  • Myasthenia gravis
  • G6PD deficiency
  • Hypersensitivity to Quinidine or other antiarrhythmic medications

Common side effects of Quinidine may include:

  • Nausea or vomiting
  • Diarrhea
  • Dizziness or lightheadedness
  • Headache
  • Rash or itching

Serious side effects of Quinidine may include:

  • Signs of an allergic reaction (e.g., hives, difficulty breathing, swelling of the face, lips, tongue, or throat)
  • Chest pain or tightness
  • Rapid or irregular heartbeat
  • Fainting or loss of consciousness
  • Unusual bleeding or bruising

It is important to seek medical attention if any of these serious side effects occur.

Where to Buy Quinidine

Quinidine is available for purchase online. To buy Quinidine sulfate salt dihydrate, please visit our website and search for product code Q0875. For more information on how to order Quinidine or any other products in our extensive catalog of chemicals and reagents, please contact our customer service team.

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