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# TUSSO-QD
## Overview
TUSSO-QD is a combination medication containing dextromethorphan, an antitussive, and guaifenesin, an expectorant.
## Primary Indications
* Symptomatic relief of cough due to minor throat and bronchial irritation.
* Helps loosen phlegm (mucus) and thin bronchial secretions to make coughs more productive.
## Adult Dosing
* **Dextromethorphan:** Typically 10 mg to 20 mg every 4 hours, or 30 mg every 6 to 8 hours. Maximum daily dose generally 120 mg.
* **Guaifenesin:** Typically 200 mg to 400 mg every 4 hours. Maximum daily dose generally 2400 mg.
* **Combination Products:** Dosing varies by specific product formulation. Refer to the product monograph for precise dosage guidelines.
## Pediatric Dosing
* **Dextromethorphan:**
* 6 to 12 years: 5 mg to 10 mg every 4 hours, or 15 mg every 6 to 8 hours. Maximum daily dose generally 60 mg.
* Under 6 years: Use is generally not recommended unless specifically directed by a healthcare provider. Safety and efficacy may not be established.
* **Guaifenesin:**
* 6 to 12 years: 100 mg to 200 mg every 4 hours. Maximum daily dose generally 1200 mg.
* Under 6 years: Use is generally not recommended unless specifically directed by a healthcare provider. Safety and efficacy may not be established.
* **Combination Products:** Dosing varies by specific product formulation and age group. Refer to the product monograph for precise dosage guidelines.
## Dose Adjustments
* **Renal Impairment:** No specific dose adjustments are typically required for renal impairment for either component, but caution may be advised in severe cases due to potential accumulation.
* **Hepatic Impairment:** Caution advised. Dextromethorphan is metabolized by the liver. Dose reduction may be considered in significant hepatic impairment.
## Contraindications
* Hypersensitivity to dextromethorphan or guaifenesin.
* Use within 14 days of MAOI inhibitor therapy (for dextromethorphan).
* Severe renal impairment (caution with guaifenesin).
## Adverse Effects
* **Dextromethorphan:** Dizziness, drowsiness, nausea, vomiting, constipation, confusion, hallucinations (rare at therapeutic doses). Serotonin syndrome is a risk, especially with co-administration of other serotonergic agents.
* **Guaifenesin:** Nausea, vomiting, dizziness, headache, rash.
## Key Drug Interactions
* **Dextromethorphan:**
* MAOIs and other serotonergic agents (SSRIs, SNRIs, triptans, lithium, tramadol): Increased risk of serotonin syndrome.
* CYP2D6 inhibitors (e.g., quinidine, fluoxetine, paroxetine): May increase dextromethorphan levels, leading to increased toxicity.
* Alcohol and CNS depressants: Additive sedative effects.
* **Guaifenesin:** Generally few significant drug interactions.
## Monitoring
* Monitor for effectiveness in cough suppression and mucus expectoration.
* Monitor for signs of adverse effects, particularly CNS effects with dextromethorphan and GI upset.
* Monitor for signs of serotonin syndrome if co-administered with other serotonergic agents.
## Clinical Pearls
* TUSSO-QD is intended for symptomatic relief and does not treat the underlying cause of the cough.
* Adequate hydration can enhance the effectiveness of guaifenesin.
* Dextromethorphan can be abused for its dissociative effects; counsel patients on appropriate use.
* Products containing dextromethorphan should be used with caution in patients with conditions that could be worsened by respiratory depression.
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**Disclaimer:** This information is intended for healthcare professionals. Always verify current prescribing information and consult relevant guidelines before initiating or modifying therapy. Dosing can vary based on specific product formulations and individual patient factors.
