Some medications are formulated such that there is a slow release of active ingredients. Such formulations are known as "extended release." Azithromycin ER is a single-dose, extended release formulation. The recommended dosage for a child 6 months and older who is brought to the emergency room with community acquired pneumonia is 60 mg/kg administered orally. Azithromycin (immediate release) has much faster onset of action and acts almost immediately when administered intravenously (by IV). Clinicians exercise clinical judgement when deciding whether or no to treat a pediatric patient with azithromycin intravenously. If therapy is deemed necessary, a dose of 10 mg/kg for those aged 6 months to 16 years is considered reasonable. How does the appropriate dose of azithromycin ER for a baby weighing 7.7 kg such as Amaan compare with the dose of azithromycin that was given intravenously to Amaan?​