Agents that increase mucous excretion. Mucolytic agents, that is drugs that liquefy mucous secretions, are also included here.
An expectorant that also has some muscle relaxing action. It is used in many cough preparations.
A mucolytic agent used in the treatment of respiratory disorders associated with viscid or excessive mucus. (From Martindale, The Extra Pharmacopoeia, 30th ed, p744)