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Dextromethorphan plus ultra low-dose quinidine reduces pseudobulbar affect.
Pioro EP, Brooks BR, Cummings J, Schiffer R, Thisted RA, Wynn D, Hepner A, Kaye R; Safety, Tolerability, and Efficacy Results Trial of AVP-923 in PBA Investigators. Pioro EP, et al. Ann Neurol. 2010 Nov;68(5):693-702. doi: 10.1002/ana.22093. Ann Neurol. 2010. PMID: 20839238 Clinical Trial.