Health Guide
Drug Guide

Dextromethorphan/quinidine (By mouth)

Dextromethorphan Hydrobromide (dex-troe-meth-OR-fan hye-droe-BROE-mide), Quinidine Sulfate (KWIN-i-deen SUL-fate)

Treats emotional incontinence or uncontrollable crying or laughing.

Brand Name(s):


There may be other brand names for this medicine.

When This Medicine Should Not Be Used:

You should not use this medicine if you have had an allergic reaction to dextromethorphan or quinidine, or if you are using this medicine together with other products containing quinidine, quinine (Qualaquin®), or mefloquine (Lariam®). Do not use this medicine if you have a history of bone marrow problems, hepatitis, lupus-like syndrome, or thrombocytopenia (low platelets in the blood) caused by quinidine, quinine, or mefloquine. You should not use this medicine if you have a heart block without a pacemaker, heart failure, or heart rhythm problems (such as congenital long QT syndrome, prolonged QT interval, or a history of torsade de pointes). Do not use this medicine if you are also using medications such as pimozide (Orap®) or thioridazine (Mellaril®), or an MAO inhibitor (MAOI) such as Eldepryl®, Marplan®, Nardil®, or Parnate® within the past 14 days.

How to Use This Medicine:


If a dose is missed:

How to Store and Dispose of This Medicine:

Drugs and Foods to Avoid:

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

Warnings While Using This Medicine:

Possible Side Effects While Using This Medicine:

Call your doctor right away if you notice any of these side effects:

If you notice these less serious side effects, talk with your doctor:

If you notice other side effects that you think are caused by this medicine, tell your doctor

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088

Last Updated: 12/12/2016

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Thomson & A.D.A.M