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What is this medicine?

QUINIDINE (KWIN i deen) is an antiarrhythmic drug. It helps make your heart beat regularly. This medicine also helps to slow rapid heartbeats. It is also used to treat certain types of malaria.

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:
  • heart disease or previous heart attack
  • kidney disease
  • liver disease
  • low blood pressure
  • lung or breathing disease, like asthma
  • myasthenia gravis
  • you have a pacemaker
  • an unusual or allergic reaction to quinidine, quinine, other medicines, foods, dyes, or preservatives
  • pregnant or trying to get pregnant
  • breast- feeding

How should I use this medicine?

Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. You can take this medicine with or without food. Take your doses at regular intervals. Do not take your medicine more often than directed. Do not stop taking this medicine suddenly. This may cause serious, heart- related side effects. Your doctor will tell you how much medicine to take. If your doctor wants you to stop the medicine, the dose will be slowly lowered over time to avoid any side effects.

Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.

What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What may interact with this medicine?

Do not take this medicine with any of the following medications:
  • abarelix
  • amiloride
  • amoxapine
  • apomorphine
  • arsenic trioxide
  • certain antifungal medicines like itraconazole or ketoconazole
  • certain quinolone antibiotics
  • cisapride
  • droperidol
  • haloperidol
  • hawthorn
  • levomethadyl
  • maprotiline
  • medicines for malaria like chloroquine and halofantrine
  • medicines for mental depression such as tricyclic antidepressants
  • mefloquine
  • methadone
  • other medicines to control heart rhythm
  • pentamidine
  • phenothiazines like chlorpromazine, mesoridazine, thioridazine
  • pimozide
  • ranolazine
  • sertindole
  • vardenafil
  • voriconazole
  • ziprasidone

This medicine may also interact with the following medications:

  • acetazolamide
  • antacids
  • barbiturates, like phenobarbital
  • cimetidine
  • diuretics
  • medicines for high blood pressure or angina
  • medicines for surgery that relax muscles or block pain
  • methazolamide
  • phenytoin
  • prescription pain medicines like codeine and hydrocodone
  • rifampin
  • sodium bicarbonate
  • warfarin

               
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