What happens if I miss a dose (Quin-G)?
Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
What happens if I overdose (Quin-G)?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
Overdose symptoms may include vomiting, diarrhea, ringing in your ears or hearing problems, dizziness or spinning sensation, blurred vision, irregular heartbeat, confusion, or feeling like you might pass out.
What should I avoid while taking quinidine (Quin-G)?
Do not change the amount of salt in your diet unless your doctor tells you to.
Grapefruit and grapefruit juice may interact with quinidine and lead to potentially dangerous effects. Discuss the use of grapefruit products with your doctor. Do not increase or decrease the amount of grapefruit products in your diet without first talking to your doctor.
What other drugs will affect quinidine (Quin-G)?
Many drugs can interact with quinidine. Below is just a partial list. Tell your doctor if you are using:
- cimetidine (Tagamet);
- digoxin (Lanoxin);
- ketoconazole (Extina, Ketozole, Nizoral, Xolegal);
- rifampin (Rifater, Rifadin, Rifamate);
- warfarin (Coumadin);
- a diuretic (water pill);
- glaucoma medication such as acetazolamide (Diamox) or methazolamide (Glauctabs, Neptazane);
- heart or blood pressure medication such as diltiazem (Cartia, Cardizem), felodipine (Plendil), nicardipine (Cardene), nimodipine, Nimotop), nifedipine (Nifedical, Procardia), propranolol (Inderal), or verapamil (Calan, Covera, Isoptin, Verelan);
- medicines to treat psychiatric disorders, such as haloperidol (Haldol), and others;
- narcotic medication such as codeine or hydrocodone (Lortab, Vicodin);
- other heart rhythm medications such as amiodarone (Cordarone, Pacerone), mexiletine (Mexitil), disopyramide (Norpace), or procainamide (Procan SR, Procanbid, Pronestyl);
- a phenothiazine such as chlorpromazine (Thorazine), promethazine (Phenergan, Promethegan), prochlorperazine (Compazine), and others;
- seizure medication such as phenytoin (Dilantin) or phenobarbital (Solfoton);
- sodium bicarbonate, potassium citrate (K-Lyte, Urocit-K), sodium citrate and citric acid (Bicitra, Oracit), or sodium citrate and potassium (Citrolith, Polycitra); or
- an antidepressant such as amitriptyline (Elavil), doxepin (Sinequan), clomipramine (Anafranil), imipramine (Tofranil), and others.
This list is not complete and there are many other drugs that can interact with quinidine. Tell your doctor about all medications you use. This includes prescription, over-the-counter, vitamin, and herbal products. Do not start a new medication without telling your doctor. Keep a list of all your medicines and show it to any healthcare provider who treats you.
Where can I get more information?
Your pharmacist can provide more information about quinidine.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
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