Dextromethorphan in Dogs

Dextromethorphan is an over-the-counter liquid medication commonly taken by humans to suppress coughing. Although dextromethorphan is not approved by the FDA for use in animals, some people use the drug to relieve minor coughing in dogs.

  1. Function

    • In both humans and dogs, dextromethorphan works by suppressing the part of the brain that produces the signals that lead to coughing, according to Drs. Foster & Smith, a leading veterinarian supply company.

    Uses

    • Dextromethorphan can be used to treat a dry cough that produces no sputum, kennel cough or chronic bronchitis as directed by a veterinarian. Moist coughs are necessary for your dog to loosen chest congestion and should not be suppressed using dextromethorphan.

    Time Frame

    • Dextromethorphan is typically given to dogs once every eight hours, according to Drs. Foster & Smith. The normal dosage is .25 milligram to 1 milligram for each pound your dog weighs, but your veterinarian might offer different advice based upon your dog's overall health.

    Risks

    • Side effects of dextromethorphan in dogs include nausea, vomiting, dizziness and drowsiness. The drug should not be used with other sedatives, narcotics or antihistamines, as this combination could cause severe sedation or even death.

    Warning

    • Never give a dog a dextromethorphan cough syrup that also contains caffeine, acetaminophen or alcohol. Also, avoid giving dextromethorphan to dogs that are pregnant or nursing or animals that have a history of lung disease or pneumonia.