Tus%2525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252520qd

# Tus%2525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252520qd ## Overview Tus%2525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252520qd is a combination product containing dextromethorphan and guaifenesin. Dextromethorphan is a cough suppressant, and guaifenesin is an expectorant. ## Primary Indications * Symptomatic relief of cough and chest congestion associated with the common cold, bronchitis, or other respiratory conditions. ## Adult Dosing * **Dextromethorphan/Guaifenesin:** Typically available in formulations of 10 mg/100 mg, 15 mg/100 mg, or 20 mg/200 mg per 5 mL or tablet. * **Dosing:** 10 mL or 1-2 tablets every 4-6 hours as needed. * **Maximum Dextromethorphan Dose:** Generally not to exceed 120 mg in 24 hours. * **Maximum Guaifenesin Dose:** Varies by formulation; consult specific product labeling. ## Pediatric Dosing * **Children 6 to <12 years:** 5 mL or 1 tablet every 4-6 hours as needed. Maximum dextromethorphan dose typically 60 mg in 24 hours. * **Children 2 to <6 years:** Dosing depends on the specific product's concentration and recommendations. Consult product labeling or pediatrician. **Use with caution and only under medical supervision.** * **Children <2 years:** Not generally recommended. Consult a pediatrician. ## Dose Adjustments * **Hepatic Impairment:** Use with caution. Dextromethorphan is metabolized by the liver; consider reduced dosage. ## Contraindications * Hypersensitivity to dextromethorphan or guaifenesin. * Concurrent use with MAO inhibitors or within 14 days of stopping MAO inhibitors (dextromethorphan). * Use in children under 2 years of age (dextromethorphan). * Asthma, chronic cough, or persistent cough (guaifenesin may increase bronchial secretions, which could be problematic in some conditions). ## Adverse Effects * **Common:** Dizziness, drowsiness, nausea, vomiting, stomach upset. * **Less Common:** Confusion, restlessness, excitation, rash. * **Rare:** Respiratory depression (especially with overdose), serotonin syndrome (with co-administration of serotonergic drugs). ## Key Drug Interactions * **MAO Inhibitors:** Risk of severe serotonin syndrome. * **Serotonergic Drugs (SSRIs, SNRIs, triptans, etc.):** Increased risk of serotonin syndrome. * **CNS Depressants (alcohol, benzodiazepines, opioids):** Additive sedative effects. * **CYP2D6 Inhibitors (e.g., fluoxetine, paroxetine, quinidine):** May increase dextromethorphan levels, increasing risk of toxicity. ## Monitoring * Effectiveness of cough suppression and expectoration. * Signs of adverse effects, particularly drowsiness, dizziness, and signs of serotonin syndrome. ## Clinical Pearls * Ensure adequate hydration to aid guaifenesin's expectorant effect. * Avoid alcohol and other CNS depressants while taking this medication. * Be aware of dextromethorphan's potential for abuse at higher doses. * Many combination products exist; verify the active ingredients and concentrations to ensure appropriate dosing. *** *Disclaimer: This information is intended for clinical pharmacists and healthcare professionals. It is essential to consult the most current prescribing information and relevant guidelines before initiating or modifying drug therapy, as product formulations and recommendations may vary.*