What is Dextromethorphan and Quinidine?

They need to know if you have any of these conditions:

• Dementia
• Heart disease
• History of irregular heartbeat
• History of low blood counts caused by a medication
• Kidney disease
• Liver disease
• Low levels of magnesium or potassium in the blood
• Myasthenia gravis
• Substance use disorder
• An unusual or allergic reaction to dextromethorphan, quinidine, other medications, foods, dyes, or preservatives
• Pregnant or trying to get pregnant
• Breast-feeding

Take this medication by mouth with a glass of water. Take it as directed on the prescription label at the same time every day. You can take it with or without food. If it upsets your stomach, take it with food. Keep taking it unless your care team tells you to stop.

Talk to your care team about use of this medication in children. Special care may be needed.

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.

Keep out of the reach of children and pets.

Store between 15 and 30 degrees C (59 and 86 degrees F). Get rid of any unused medication after the expiration date.

To get rid of medications that are no longer needed or have expired:

• Take medication to a medication take-back program. Check with your pharmacy or law enforcement to find a location.
• If you cannot return the medication, check the label or package insert to see if the medication should be thrown out in the garbage or flushed down the toilet. If you are not sure, ask your care team. If it is safe to put it in the trash, pour the medication out of the container. Mix the medication with cat litter, dirt, coffee grounds, or other unwanted substance. Seal the mixture in a bag or container. Put it in the trash.