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A cough medicine or cough and cold medicine, also known as cough syrup or linctus when in syrup form, is a medicinal drug used in those with coughing and related conditions. There is no good evidence for or against the use of over-the-counter cough medications in those with a cough. While they are used by 10% of American children weekly, they are not recommended in Canada and the United States in children 6 years or younger because of lack of evidence showing effect and concerns of harm. ==Types== There are a number of different cough and cold medications, which may be used for various coughing symptoms. The commercially available products may include various combinations of any one or more of the following five types of substances: *Expectorants are substances claimed to make coughing easier while enhancing the production of mucus and phlegm. Two examples are acetylcysteine and guaifenesin. *Antitussives, or cough suppressants, are substances which suppress the coughing itself. Examples are codeine, dextromethorphan, and noscapine. *Antihistamines may sedate a person a bit and reduce other associated symptoms, like a runny nose and watery eyes; one example is diphenhydramine. *Decongestants relieve nasal congestion. One example is ephedrine. *Antipyretics are substances that reduce fever. One example is paracetamol. *Also employed are various substances supposed to soften the coughing, like honey or sugar syrup. There is no good evidence supporting the effectiveness of over-the-counter cough medicines to reduce coughing.〔 Some brand names include: Benilyn, Sudafed, Robitussin and Vicks among others.〔(【引用サイトリンク】url=http://www.mhra.gov.uk/home/groups/comms-po/documents/websiteresources/con038907.pdf )〕 Most contain a number of active ingredients.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cough medicine」の詳細全文を読む スポンサード リンク
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