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Brain & Nervous System Health Center

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Nuedexta Treats Laughing and Crying Outbursts

FDA Approves New Drug to Constrain Involuntary Laughing and Crying Associated With Some Neurologic Disorders
WebMD Health News
Reviewed by Laura J. Martin, MD

Editor's note: On Jan. 20, 2015, the FDA updated the prescribing information for Nuedexta to note that Nuedexta can be prescribed to patients with pseudobulbar affect caused by neurological conditions or brain injuries.  

Nov. 2, 2010 -- The FDA has approved a drug that curbs involuntary and uncontrolled crying and laughing episodes that are experienced by patients with some neurological disorders.

The medication, Nuedexta, is the first to be approved for treatment of people with symptoms known as pseudobulbar affect, or the loss of emotional control.

Other conditions in which this occurs include multiple sclerosis or Lou Gehrig’s disease, technically called amyotrophic lateral sclerosis or ALS.

But the FDA says in a news release that Nuedexta has not been shown to be safe and effective in people with other diseases that can be associated with episodic emotional outbursts, such as Alzheimer’s and other forms of dementia.

Nuedexta Availability

Nuedextra is expected to be on the market by prescription in the first three months of 2011.

The medication is a combination of the generic drug quinidine, which prevents heart arrhythmia, and the cough suppressant dextromethorphan.

Avanir Pharmaceuticals, based in Aliso Viejo, Calif., says in a news release that the combination is thought to affect the neurotransmitter glutamate.

The company presented results of a study on the drug at the American Academy of Neurology’s annual meeting in Toronto in April. It showed the patients on the drug reported fewer episodes of involuntary crying and laughing.

In 2006, the FDA decided not to approve the medication because of safety concerns with quinidine causing increased risk of heart rhythm abnormalities. Avanir then reformulated the drug with a lower dose of quinidine.

Laughing and Crying Episodes

Avanir said in a news release that pseudobulbar affect occurs secondary to a variety of neurological conditions, and that it is characterized by involuntary, sudden, and frequent episodes of laughing or crying.

Nicholas LaRocca, a vice president of Healthcare Delivery and Policy Research at the National MS Society, says in the Avanir news release that Nuedexta’s approval by the FDA “represents a significant step forward for people who live with the debilitating effects” of pseudobulbar affect and “has the potential to substantially help both them and their families.”

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