Drug details

Quinidine Sulfate (quinidine sulfate tablet, film coated, extended release)

type of Antidysrhythmics, Ia

Quinidine sulfate is an antimalarial and antiarrhythmic drug used to treat or prevent many types of irregular heartbeats (heart arrhythmias such as atrial fibrillation). Quinidine sulfate is available in generic form.

This drug may have the following side effects:

• nausea
• rash
• vomiting
• diarrhea
•  headache
• fatigue
• loss of appetite
• weakness
• lightheadedness
• stomach pain/cramps
• a burning feeling in throat or chest (e.g., heartburn)
• heart palpitations
• angina-like chest pain
• vision problems
• changes in sleep habits
• tremor
• nervousness, or
• loss of coordination

The following drugs are related to Quinidine Sulfate, either as a replacement or used together:

• Tikosyn (dofetilide)
• Promacta (eltrombopag tablets)