Before You Buy Robitussin DM

Robitussin cold medicine
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Robitussin DM is an over-the-counter cough suppressant and expectorant. This medicine helps control your cough and thin secretions so the cough is more productive. It is widely available under the brand name Robitussin and the same formulation may be purchased as a store brand or in generic form.

The ingredients in this medicine help to loosen mucous and suppress a cough that is bothersome. It should not be used in children under 6 without talking to the child's doctor first. 

Active Ingredients (in each 5ml teaspoon)

Dextromethorphan HBr 10mg (cough suppressant)
Guaifenesin 100mg (expectorant)

  • Dosing

    Adults 12 and older - Two teaspoons every four hours as needed for cough. Do not take more than six doses in 24 hours.
    • Children ages six to 12 - One teaspoon every four hours. Do not take more than six doses in 24 hours.
      • Uses for Robitussin DM

        Temporary relief of cough due to throat irritation from:
        • Common Cold
      • Flu
      • Inhaled Irritants
      Helps loosen phlegm (mucous) and thins bronchial secretions to make cough more productive.
        • Side Effects of Robitussin DM

          • Drowsiness or dizziness
        • Hives or skin rash
        • Nausea, stomach pain or vomiting
        Rare but serious side effects that should be reported to your doctor immediately:
          • Confusion
        • Excitement, nervousness or restlessness
        • Severe nausea and vomiting
        • Slurred speech
        • Seizures or convulsions - in children
        • Shakey movements - in children
        • Slow or troubled breathing - in children
        • Warnings

          • Do not use this medication if you are taking an MAOI (medication for depression, psychiatric, emotional conditions or Parkinson's disease) or for two weeks after stopping an MAOI.
          • Ask a Doctor Before Use

            • If you have a chronic cough that is caused by asthma, smoking or emphysema
            • If you have a cough that produces a lot of mucous
            • If you are pregnant or breastfeeding
            • Caution

              Stop use and ask doctor if:
                • Pain or cough worsens or lasts more than seven days
              • Cough occurs with fever, headache or rash won't go away
      View Article Sources
      • "Robitussin Cough Product Labeling." Wyeth Consumer Healthcare 2007.