Mirtazapine , the first noradrenergic and specific serotonergic antidepressant ( NaSSA ) , has been associated with RLS in several recent publications .
B-ChemicalEntity O O O B-ChemicalEntity I-ChemicalEntity I-ChemicalEntity I-ChemicalEntity I-ChemicalEntity O B-ChemicalEntity O O O O O O B-DiseaseOrPhenotypicFeature O O O O O