Antitussives Robitussin

Expectorants Guaifenesin, 100-400 mg every 4 hours 600-1200 mg (extended release) every 12 hours Glytuss, Robitussin, various generic The only OTC expectorant recognized as safe and effective by the FDA. Often used with antihistamines, decongestants, and antitussives in combination products. 

Antitussives Codeine, 10-20 mg every 4-6 hours (with guaifenesin) Robitussin A-C, Guiatuss AC, various generic Acts centrally to increase the cough threshold. In doses required for cough suppression, the addictive liability associated with codeine is low. Many codeine-containing antitussive combinations are schedule V narcotics, and OTC sale is restricted in some states. 

Dextromethorphan hydrobromide (Robitussin Route PO DM, Romilar, PediaCare, Benylin DM), benzonatate (Tessalon), diphenhydramine (Benadryl) promethazine with dextromethorphan [combination of a phenothiazine and nonnarcotic antitussive]... 

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