Robitussin-DM^®

Generic Drug
Guaifenesin and Dextromethorphan HBr

Dosage Forms (Robins Consumer)
Syrup, Guaifenesin: 100 mg per 5 mL. Dextromethorphan HBr: 10 mg per 5 mL.

• For adults and children > 12: 10 mL every 4 hours, which provides 200 mg of guaifenesin, and 20 mg of dextromethorphan.
• Do not exceed 60 mL (120 mg of dextromethorphan) per day.

 Pediatric Dosing Guidelines

• For children 6 to 12: 2.5 mL to 5 mL every 4 hours, which provides 50 to 100 mg of guaifenesin, and 5 to 10 mg of dextromethorphan.
• Do not exceed 30 mL (60 mg of dextromethorphan) per day.
• For children 2 to 6: 1.25 mL to 2.5 mL every 4 hours.
• Do not exceed 15 mL (30 mg of dextromethorphan) per day.

Robitussin-DM is used to treat irritating, nonproductive coughing associated with the common cold, influenza, and infections of the lungs, throat, or sinuses. Drink extra fluids during use to help relieve chest congestion. To ensure proper dosing, measure the liquid with a special dosing cup or spoon, not with a regular teaspoon. If cough worsens, lasts more than a week, or is accompanied by fever, rash or persistent headache, consult your physician. Do not use for continual cough due to smoking, asthma, or emphysema, or when cough has excessive mucus. Do not use if you are sensitive to guaifenesin or dextromethorphan. Avoid using Robitussin-DM if you have used any monoamine oxidase inhibitors (MAOI’s) such as Marplan® (isocarboxazid), Nardil® (phenelezine), or Parnate® (tranylcypromine) in the past 14 days, due to the possibility of a serious drug interaction. Use only as directed by physician in children under 2 years of age. If pregnant, consult your physician or pharmacist before use.

Guaifenesin is an expectorant that loosens phlegm and increases the lubrication of your lungs allowing for a productive cough and decreased congestion of the chest. Dextromethorphan is a cough suppressant, which depresses the cough center of the medulla. Dextromethorphan is a codeine analog, with no analgesic or addictive properties.

Adverse Reactions/Side Effects
No serious side effects are expected from guaifenesin and dextromethorphan therapy. The most common are dizziness, nausea, and vomiting, with headache, rash, nervousness, hyperactivity, and insomnia also reported.


Natural Products or Nutritional Interactions (if applicable)
There are no known interactions between guaifenesin and other medicines. Talk to your physician or pharmacist before taking any other prescription or over-the-counter medicines with guaifenesin. May be taken with food.