Iv%25252525252520dexamethasone

# IV Dexamethasone ## Overview Dexamethasone is a potent, long-acting synthetic glucocorticoid with negligible mineralocorticoid activity. It provides profound anti-inflammatory and immunosuppressive effects. ## Primary Indications * Cerebral edema (associated with brain tumors, neurosurgery) * Severe allergic reactions/anaphylaxis (adjunct) * Acute exacerbations of COPD/Asthma * Antiemetic prophylaxis for highly/moderately emetogenic chemotherapy * Anti-inflammatory treatment for COVID-19 (requiring supplemental oxygen) * Bacterial meningitis (adjunct to antibiotics) ## Adult Dosing * **Cerebral Edema:** Initial 10 mg IV, followed by 4 mg IM/IV every 6 hours. * **Antiemetic (CINV):** 8–20 mg IV once before chemotherapy. * **COVID-19:** 6 mg IV once daily for up to 10 days. * **Severe Inflammation/Allergy:** 4–20 mg IV as a single dose; may repeat if necessary. * **Meningitis:** 10 mg IV every 6 hours for 4 days (administer with or just before the first antibiotic dose). ## Pediatric Dosing * **Cerebral Edema:** Loading dose 1.5 mg/kg IV once, followed by 0.375–0.5 mg/kg IV every 6 hours (max 16 mg/day). * **Anti-inflammatory/Croup:** 0.6 mg/kg IV/IM as a single dose (max 10–16 mg). * **Bacterial Meningitis:** 0.15 mg/kg IV every 6 hours for 4 days (start with/before antibiotics). * *Consult institutional weight-based protocols for specific indications.* ## Dose Adjustments * **Hepatic/Renal Impairment:** No specific adjustment required; however, systemic clearance may be reduced in severe hepatic dysfunction. * **Long-term use:** Must be tapered gradually to prevent adrenal insufficiency. ## Contraindications * Systemic fungal infections. * Hypersensitivity to dexamethasone or any component of the formulation. * Avoid live or live-attenuated vaccines in patients receiving immunosuppressive doses. ## Adverse Effects * **Short-term:** Hyperglycemia, hypertension, fluid retention, psychiatric disturbances (insomnia, mood swings, psychosis), and gastritis/peptic ulcer disease. * **Long-term:** Adrenal suppression, osteoporosis, avascular necrosis, Cushingoid features, immunosuppression, and skin atrophy. ## Key Drug Interactions * **CYP3A4 Inducers:** (e.g., phenytoin, phenobarbital, rifampin) may decrease dexamethasone efficacy. * **CYP3A4 Inhibitors:** (e.g., ritonavir, ketoconazole) may increase dexamethasone levels. * **NSAIDs:** Increased risk of GI ulceration/bleeding. * **Antidiabetic agents:** Dexamethasone increases blood glucose; insulin/oral agent dose adjustments are often necessary. ## Monitoring * Blood glucose (especially in diabetic patients). * Blood pressure. * Signs of infection or fluid retention (edema, weight gain). * Serum electrolytes (hypokalemia risk). * Neuro/psychiatric status. ## Clinical Pearls * **Timing:** Administer in the morning to mirror diurnal cortisol production if used for extended periods. * **Meningitis:** Timing is critical; efficacy for hearing loss prevention is lost if given *after* antibiotic initiation. * **Compatibility:** Dexamethasone sodium phosphate is generally physically compatible with many IV fluids and drugs, but always confirm Y-site compatibility before administration. * **Rapid Administration:** Can be given via direct IV push; rapid infusion is generally well-tolerated, though perineal burning / itching has been reported with rapid bolus. *** **Disclaimer:** This information is for educational purposes only. Clinical practice varies by institution. Always verify current prescribing information, institutional protocols, and specific patient contraindications via reliable clinical resources (e.g., Lexicomp, Micromedex) before administration.