On the expectorant action of parasympathomimetic drugs.
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D002492:Central Nervous System Depressants; D005100:Expectorants; D009420:Nervous System; D010277:Parasympathomimetics; D013564:Sympathetic Nervous System / Q000187:drug effects*
D002492:Central Nervous System Depressants; D005100:Expectorants; D010277:Parasympathomimetics