title: On the expectorant action of parasympathomimetic drugs.
authors.forename: E M
authors.initials: EM
authors.lastname: BOYD
authors.forename: M S
authors.initials: MS
authors.lastname: LAPP
mesh_terms: D002492:Central Nervous System Depressants; D005100:Expectorants; D009420:Nervous System; D010277:Parasympathomimetics; D013564:Sympathetic Nervous System / Q000187:drug effects*
chemical_list: D002492:Central Nervous System Depressants; D005100:Expectorants; D010277:Parasympathomimetics