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# Dextromethorphan (as component of "D%252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252525252520cold")
## Overview
Dextromethorphan is a cough suppressant (antitussive). The specific product requested is a combination product, and the exact active ingredients and their concentrations will vary. This information pertains to dextromethorphan as a single agent.
## Primary Indications
* Symptomatic relief of cough.
## Adult Dosing
* **Immediate-release:** 10-20 mg every 4 hours, or 30 mg every 6-8 hours.
* **Extended-release:** 60 mg every 12 hours.
* Maximum daily dose: Typically 120 mg for immediate-release and 120 mg for extended-release, but consult specific product labeling.
## Pediatric Dosing
* **Ages 6 to 12 years:** 5-10 mg every 4 hours, or 15 mg every 6-8 hours.
* **Ages 12 years and older:** Adult dosing.
* **Under 6 years:** Use is generally not recommended due to risk of respiratory depression and lack of established safety and efficacy. Consult a pediatrician.
## Dose Adjustments
* No specific dose adjustments are typically required for renal or hepatic impairment, but caution is advised and lower doses may be considered in severe impairment.
## Contraindications
* Hypersensitivity to dextromethorphan.
* Use within 14 days of MAO inhibitor therapy (risk of serotonin syndrome).
* Concurrent use with certain serotonergic agents.
## Adverse Effects
* Dizziness, drowsiness, nausea, vomiting, constipation, confusion.
* At higher doses: Sedation, respiratory depression, abuse potential.
## Key Drug Interactions
* **MAO Inhibitors:** Risk of severe hypertension and serotonin syndrome.
* **Serotonergic Agents (SSRIs, SNRIs, triptans, etc.):** Increased risk of serotonin syndrome.
* **CNS Depressants (alcohol, benzodiazepines, opioids):** Additive CNS depression.
* **CYP2D6 Inhibitors (fluoxetine, paroxetine, quinidine):** Increased dextromethorphan levels, leading to potential toxicity.
## Monitoring
* Monitor for effectiveness in cough suppression.
* Assess for adverse effects, particularly CNS and GI.
* Monitor for signs of serotonin syndrome if concomitant serotonergic agents are used.
## Clinical Pearls
* Dextromethorphan is often found in combination cold and cough products. Be aware of the other active ingredients and their potential interactions and contraindications.
* Higher doses are associated with abuse potential and hallucinogenic effects.
* It is important to counsel patients on the risks of concomitant use with MAO inhibitors and other serotonergic drugs.
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*This information is for educational purposes and is not a substitute for professional medical advice. Always consult with a qualified healthcare provider and refer to the most current prescribing information for specific treatment decisions.*
