Iv%25252525252525252520dexamethasone

# IV Dexamethasone ## Overview Dexamethasone is a potent, long-acting synthetic glucocorticoid with minimal mineralocorticoid activity. It provides profound anti-inflammatory and immunosuppressive effects. ## Primary Indications * Cerebral edema (associated with brain tumors, neurosurgery, or abscess). * Bacterial meningitis (adjuvant therapy). * Refractory shock (vasopressor-dependent). * Acute airway edema (e.g., croup or post-extubation). * Antiemetic prophylaxis in chemotherapy. * Severe COVID-19 (requiring supplemental oxygen). ## Adult Dosing * **Cerebral Edema:** 10 mg IV bolus, followed by 4 mg IV every 6 hours. * **Bacterial Meningitis:** 10 mg IV every 6 hours for 4 days (start with or shortly before first antibiotic dose). * **COVID-19:** 6 mg IV daily for up to 10 days. * **Antiemetic (High Emetogenic Chemotherapy):** 12–20 mg IV as a single dose before chemotherapy. * **Airway Edema:** 10 mg IV single dose. ## Pediatric Dosing * **Bacterial Meningitis:** 0.15 mg/kg IV every 6 hours for 4 days (max 10 mg/dose). Must be administered 15 minutes prior to or concurrent with the first antibiotic dose. * **Croup:** 0.6 mg/kg IV/IM as a one-time dose (max 10 mg). * **COVID-19:** 0.15 mg/kg IV daily (max 6 mg) for 10 days. * **Cerebral Edema:** Loading dose 1–2 mg/kg, then 1–1.5 mg/kg/day divided every 4–6 hours. ## Dose Adjustments * **Hepatic Impairment:** Clearance may be decreased; monitor for increased effects. * **Renal Impairment:** No standard adjustment required for short-term use. * **Chronic Use:** Must be tapered to prevent adrenal insufficiency. ## Contraindications * Systemic fungal infections. * Hypersensitivity to dexamethasone or components. * Avoid live vaccines during immunosuppressive doses. ## Adverse Effects * **Metabolic:** Hyperglycemia (common, especially in diabetics), hypokalemia, fluid retention. * **Gastrointestinal:** Peptic ulcer disease, GI hemorrhage. * **Neurologic/Psychiatric:** Insomnia, mood swings, psychosis, agitation. * **Other:** Hypertension, increased susceptibility to infection, delayed wound healing. ## Key Drug Interactions * **CYP3A4 inducers (e.g., phenytoin, rifampin):** May decrease dexamethasone efficacy. * **CYP3A4 inhibitors (e.g., ketoconazole, ritonavir):** May increase dexamethasone exposure. * **NSAIDs/Anticoagulants:** Increased risk of GI ulceration and bleeding. * **Antidiabetic agents:** Glucocorticoids reduce glycemic control; escalate insulin/hypoglycemic therapy as needed. ## Monitoring * Fingerstick blood glucose (frequently in diabetics or high-dose patients). * Blood pressure. * Signs of infection. * Electrolytes (potassium, sodium). * Psychiatric status. ## Clinical Pearls * **Rapid Administration:** IV push is generally safe and tolerated; slow administration is often preferred but not mandatory unless specified by institution protocol. * **Infection Masking:** Can mask signs of sepsis or peritonitis due to anti-inflammatory effects. * **Adrenal Suppression:** Doses equivalent to >5 mg prednisone daily for longer than 3 weeks may cause HPA axis suppression; taper required. * **Local Protocols:** Hospital-specific guidelines may vary significantly for sepsis or oncology indications. *** **Disclaimer:** This information is for educational purposes only. Always verify doses, contraindications, and drug interactions against institutional protocols and the most current prescribing information (e.g., Lexicomp, Micromedex) before administering medication.