Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed. Your blood pressure and heart rate should be monitored in a hospital or clinic setting when you start using quinidine, and whenever your dose is changed.
Do not change your medication dose or schedule without your doctor's advice.
Quinidine oral is taken by mouth. Quinidine injection is given as an infusion into a vein. A healthcare provider will give you this injection if you are unable to take the medicine by mouth.
Do not crush or chew an extended-release tablet. Swallow it whole. You may break the tablet in half if your doctor instructs you to.
When quinidine is given to treat malaria, you may also be given antibiotic medication. Keep using the antibiotic for as long as your doctor has prescribed.
Store at room temperature away from moisture and heat.
 Detailed Quinidine dosage information
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What happens if I miss a dose?
Take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.
Because you will receive quinidine injection in a clinical setting, you are not likely to miss a dose.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. An overdose of quinidine can be fatal.
Overdose can cause vomiting, diarrhea, ringing in your ears, hearing loss, severe dizziness, double vision, confusion, irregular heartbeats, or feeling like you might pass out.
