Pharmacologic management of cough

Area of Science:

• Pharmacology
• Neurology
• Respiratory Medicine

Background:

• Recent research updates understanding of cough suppressants and cough impairment.
• Low-dose oral morphine shows efficacy in chronic cough but has potential side effects.
• The utility of inhaled irritants in assessing cough suppressants is debated.

Purpose of the Study:

• To review recent advances in cough suppressants and cough impairment.
• To highlight new methods for measuring cough sensation, like the urge to cough.
• To discuss the condition of dystussia and its implications.

Main Methods:

• Review of recent scientific literature on cough suppressants and cough impairment.
• Analysis of studies on the efficacy and side effect profiles of antitussives.
• Examination of new methodologies for assessing cough reflex and sensation.

Main Results:

• Low-dose oral morphine effectively suppresses chronic cough.
• A dissociation exists between antitussive efficacy and effects on cough sensitivity.
• The 'urge to cough' index suggests suprapontine brain involvement in cough.
• Mucolytic agents show limited value as monotherapies but may serve as adjuncts.
• Dystussia, or impaired cough, is linked to dysphagia and aspiration risk in neurological disease.

Conclusions:

• While promising, oral morphine's side effects may restrict its use.
• New insights into cough sensation and brain involvement are emerging.
• Dystussia is a critical issue in neurological patients, requiring further research for treatments.