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This activity provides a comprehensive overview of dextromethorphan/guaifenesin, a combination medication used to treat productive coughs associated with various respiratory conditions, including acute bronchitis, chronic obstructive pulmonary disease (COPD), and allergies. Designed for interprofessional team members who may administer dextromethorphan/guaifenesin therapy, this activity discusses the indications, actions, contraindications, mechanism of action, adverse event profile, monitoring objectives, and overdose management strategies essential for optimizing patient outcomes in the management of productive coughs and related respiratory ailments. Objectives: Assess the mechanism of action and indications for dextromethorphan and guaifenesin. Identify the contraindications for dextromethorphan and guaifenesin and what adverse effects might occur if not administered properly. Develop monitoring goals for patients treated with dextromethorphan and guaifenesin. Collaborate with the interprofessional collaboration in managing a productive cough and treating overdose. Access free multiple choice questions on this topic.

Dextromethorphan and guaifenesin have abuse potential. Persons who abuse it or take an increased amount are at risk for overdose.[3] Signs and Symptoms of Overdose Dextromethorphan and guaifenesin toxicity occurs in different stages, which users refer to as "plateaus." The first "plateau" occurs at 1.5 mg/kg, a dosage causing mild stimulation. The second "plateau" occurs at 2.5 to 7.5 mg/kg; users may experience mild to moderate euphoria and hallucinations. At the third "plateau" of 7.5 to 15 mg/kg, the patient may experience dissociation that some have described as an "out-of-body" state. Finally, at the fourth "plateau," patients experience complete dissociation and become nonresponsive. Other signs and symptoms associated with overdose of dextromethorphan and guaifenesin include: Dyspnea Blurred vision Seizures Vomiting Drowsiness Dizziness Tachycardia Hyperthermia Anxiety Altered mental status Management of Overdose There is no specific antidote for an overdose of this combination medication, and management is symptomatic. Activated charcoal may absorb dextromethorphan and guaifenesin in the small intestine and stomach, preventing their enterohepatic and vascular circulation and absorption and reducing toxic effects. Recommendations If the patient has difficulty breathing, supplemental oxygen and assisted ventilation may be given. Management is typically supportive while monitoring vital signs and electrolyte levels. Naloxone can reverse coma and respiratory depression in patients who have overdosed but should not be used as a substitute for supportive care.[21]

Patients with a productive cough as a symptom of the common cold, allergies, or chest congestion can use dextromethorphan and guaifenesin to relieve their symptoms acutely. Physicians, advanced practitioners, nurses, pharmacists, and other healthcare professionals must know this combination's pharmacodynamic properties, adverse effects, and monitoring goals. Because dextromethorphan and guaifenesin are commonly purchased over the counter, practitioners and pharmacists should also educate patients on recommended dosages based on mucus production and cough severity. Ethical considerations include ensuring patient autonomy and education on the recommended doses to prevent overdose. Interprofessional collaboration is essential to ensure proper dosing for patients taking this medication combination. Prevention or management of overdose occurs when the paramedics reach the scene of an overdose, the triage nurse suspects an overdose upon patient arrival, or the physician informs the patient of proper dosing of this medication. This coordination between healthcare professionals enhances patient education to prevent overdose, treats symptoms and ensures patient safety.