Tus%2525252525252525252525252525252525252525252525252520qd

## Overview Tus%2525252525252525252525252525252525252525252525252520qd is a combination medication containing dextromethorphan and guaifenesin. Dextromethorphan is a cough suppressant, and guaifenesin is an expectorant. ## Primary Indications * Symptomatic relief of cough. * Aid in the loosening of mucus and thinning of bronchial secretions in patients with a chronic bronchitis cough. ## Adult Dosing * **Cough Suppression/Expectorant:** 10 mL to 20 mL every 4 hours as needed, or 20 mL every 4-6 hours as needed. Do not exceed 120 mL in 24 hours. * **Alternative:** Some formulations may have specific dosing based on product strength. ## Pediatric Dosing * **Children 12 years and older:** 10 mL to 20 mL every 4 hours as needed, or 20 mL every 4-6 hours as needed. Do not exceed 120 mL in 24 hours. * **Children 6 to under 12 years:** 5 mL to 10 mL every 4 hours as needed. Do not exceed 60 mL in 24 hours. * **Children 2 to under 6 years:** 2.5 mL to 5 mL every 4 hours as needed. Do not exceed 30 mL in 24 hours. * **Children under 2 years:** Safety and efficacy have not been established. Consult a pediatrician. Dosing may depend on local protocol. ## Dose Adjustments * **Renal Impairment:** No specific adjustments are typically recommended for guaifenesin or dextromethorphan in mild to moderate renal impairment. Use with caution in severe renal impairment. * **Hepatic Impairment:** Use with caution. Dextromethorphan is metabolized in the liver. ## Contraindications * Hypersensitivity to dextromethorphan, guaifenesin, or any component of the formulation. * Concurrent use or within 2 weeks of MAOI therapy. * Dextromethorphan-containing products are generally contraindicated in patients with asthma. ## Adverse Effects * **Common:** Dizziness, drowsiness, nausea, vomiting, stomach upset. * **Less Common:** Confusion, hallucinations, respiratory depression (especially with overdose), rash. ## Key Drug Interactions * **MAO Inhibitors:** Increased risk of serotonin syndrome, hypertensive crisis. * **SSRIs, SNRIs, Tricyclic Antidepressants:** Increased risk of serotonin syndrome. * **CYP2D6 Inhibitors (e.g., fluoxetine, paroxetine, quinidine):** May increase dextromethorphan plasma concentrations, leading to increased side effects. * **Alcohol and CNS Depressants:** Additive sedative effects. ## Monitoring * Monitor for cough suppression and expectoration effectiveness. * Assess for signs and symptoms of adverse effects, particularly drowsiness, dizziness, and respiratory changes. * Monitor for signs of serotonin syndrome if co-administered with serotonergic agents. ## Clinical Pearls * This medication is for symptomatic relief and does not treat the underlying cause of the cough. * Encourage adequate fluid intake to help thin mucus, especially when using guaifenesin. * Advise patients to avoid alcohol and other CNS depressants while taking this medication. * Caution patients about operating machinery or driving until they know how this medication affects them. * Dextromethorphan can be abused; counsel patients on appropriate use. *** **Disclaimer:** This information is for educational purposes only and does not substitute for professional medical advice. Always consult with a qualified healthcare provider to ensure the appropriateness of any medication and to verify current prescribing information before making any treatment decisions.