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a medicine promoting expectoration (同)expectorator
the process of coughing up and spitting out

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痰(たん)が出るのを促す / 去痰(きょたん)剤

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/05/08 16:05:11」(JST)

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Mucokinetics are a class of drugs which aid in the clearance of mucus from the airways, lungs, bronchi, and trachea. Such drugs can be further categorized by their mechanism of action:

mucolytic agents
expectorants
wetting agents / hypoviscosity agents
abhesives / surfactants

In general, clearance ability is hampered by bonding to surfaces (stickiness) and by the viscosity of mucous secretions in the lungs. In turn, the viscosity is dependent upon the concentration of mucoprotein in the secretions.

Expectorants and mucolytic agents are different types of medication, yet both are intended to promote drainage of mucus from the lungs.

An expectorant (from the Latin expectorare, to expel from the chest) works by signaling the body to increase the amount or hydration of secretions, resulting in more yet clearer secretions and as a byproduct lubricating the irritated respiratory tract. One expectorant, guaifenesin, is commonly available in many cough syrups. Often the term "expectorant" is incorrectly extended to any cough medicine, since it is a universal component.^[1]

A mucolytic agent is an agent which dissolves thick mucus and is usually used to help relieve respiratory difficulties. It does so by dissolving various chemical bonds within secretions, which in turn can lower the viscosity by altering the mucin-containing components.

Alternatively, attacking the affinity between secretions and the biological surfaces is another avenue, which is used by abhesives and surfactants.

Any of these effects could potentially improve airway clearance during coughing.

An expectorant increases bronchial secretions and mucolytics help loosen thick bronchial secretions. Expectorants reduce the thickness or viscosity of bronchial secretions thus increasing mucus flow that can be removed more easily through coughing. Mucolytics break down the chemical structure of mucus molecules. The mucus becomes thinner and can be removed more easily through coughing.

—Adams, Holland, & Bostwick, 2008, p. 591

Mucokinetic drugs

Mucolytics

Many mucolytic drugs are available, including acetylcysteine, ambroxol, carbocisteine, erdosteine, mecysteine, and dornase alfa (some brand names are listed in the related articles).

References

^ "Definition of Expectorant". MedicineNet. MedicineNet.com. Retrieved 14 December 2010.

Adams, Holland, & Bostwick (2008). Pharmacology for Nurses: A Pathophysiologic approach. Author. Upper Saddle River, New Jersey.
http://www.rcjournal.com/contents/07.02/07.02.0818.cfm
http://www.rcjournal.com/contents/07.07/07.07.0859.pdf

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Orally Administered Mucolytic Drug l-Carbocisteine Inhibits Angiogenesis and Tumor Growth in Mice.

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Towards a biological monitoring guidance value for acrylamide.

Sams C1, Jones K2, Warren N2, Cocker J2, Bell S3, Bull P3, Cain M3.
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Chinese medicine amygdalin and β-glucosidase combined with antibody enzymatic prodrug system as a feasible antitumor therapy.

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Amarogentin is an efficacious Chinese herbal medicine and a component of the bitter apricot kernel. It is commonly used as an expectorant and supplementary anti-cancer drug. β-Glucosidase is an enzyme that hydrolyzes the glycosidic bond between aryl and saccharide groups to release glucose. Upon th
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Study of urinary 2-{[2-(acetylamino-2-carboxyethyl]sulfanyl}butanedioic acid, a mercapturic acid of rats treated with maleic acid.

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Japanese Journal

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Morusinol Extracted from Morus Alba Inhibits Arterial Thrombosis and Modulates Platelet Activation for the Treatment of Cardiovascular Disease

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Journal of Atherosclerosis and Thrombosis 19(6), 516-522, 2012
… Morus alba (white mulberry) has been used in traditional Chinese medicine as an anti-headache, diuretic, expectorant, and anti-diabetic agent. …
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