Definition of Pulmonary Sedative:

These lessen the irritability of the respiratory nerves or center, thereby diminishing cough and dyspnea. Some directly depress the center, others remove irritating substances from the passages, others lessen local congestion, others lower the excitability of the vagus end-organs and afferent filaments of the lungs and respiratory tract: opium, morphine, codeine, hydrocyanic acid, belladonna [Culbreth1927, pp 41-42].

This sounds like a synonymn for Anti-tussive [ORWJr].

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