Dopamine & Dobutamine Pediatric Dose — Cardiovascular Infusions
Dopamine and dobutamine are catecholamine inotropes used in pediatric cardiovascular support. Dopamine acts on dopaminergic, beta-adrenergic, and alpha-adrenergic receptors in a dose-dependent manner, while dobutamine primarily stimulates beta-1 receptors to increase myocardial contractility and cardiac output. Both agents are indicated in pediatric shock states — including septic, cardiogenic, and distributive shock — when fluid resuscitation alone is insufficient to restore adequate perfusion.
Pediatric Dosing
Both dopamine and dobutamine are administered as continuous intravenous infusions, titrated to clinical effect:
- Starting dose: 2 mcg/kg/min IV infusion
- Titration range: 2–20 mcg/kg/min IV infusion
- Adjust in increments every few minutes based on hemodynamic response and clinical status
For a 20 kg child: a dose of 5 mcg/kg/min equals 100 mcg/min (6,000 mcg/hr). Consult your institutional protocol for specific preparation concentrations and infusion pump programming guidance.
Indications and Clinical Context
Dopamine and dobutamine are first- or second-line vasoactive agents in pediatric shock management per PALS guidelines. Dopamine is commonly used in septic shock with hypotension when fluid resuscitation has not restored adequate perfusion pressure; at lower infusion rates it provides inotropic support, while at higher rates (typically above 10 mcg/kg/min) it exerts increasing vasopressor effects. Dobutamine is favored in cardiogenic shock or low cardiac output states where improved contractility and reduced afterload are the primary therapeutic goals.
These infusions are typically initiated in a PICU or emergency setting with continuous hemodynamic monitoring. The appropriate agent and dose should be selected based on the predominant hemodynamic deficit (low contractility vs. low vascular resistance) and the patient’s clinical trajectory.
Administration and Monitoring
Both agents should be administered as continuous infusions via a dedicated intravenous or intraosseous line, ideally through central venous access to minimize the risk of extravasation injury; peripheral administration may be used temporarily in emergencies. Titrate the infusion rate within the 2–20 mcg/kg/min range based on blood pressure, heart rate, perfusion, and urine output. Consult institutional protocol for maximum dose thresholds and escalation criteria.
- Monitor continuously for tachyarrhythmias, which may require dose reduction
- Assess for signs of extravasation; tissue necrosis can occur with peripheral infiltration
- Dopamine at higher doses may increase systemic vascular resistance and heart rate — consider switching agents if adverse effects emerge
- Dobutamine may cause hypotension due to peripheral vasodilation, particularly in volume-depleted patients
- Wean infusions gradually when discontinuing to avoid rebound hemodynamic instability
Disclaimer: This article is an educational reference summarizing standard pediatric dosing values. It is not a substitute for clinical judgment. Always verify doses against institutional protocols, the current edition of authoritative references (e.g., Lexicomp, Harriet Lane Handbook, PALS guidelines), the patient’s accurate weight, and any patient-specific factors (renal/hepatic function, allergies, comedications) before administration.