When is lipid emulsion therapy indicated and what is a common adult bolus dose?

• A. For lipophilic drug overdoses; 1.5 mL/kg of 20% lipid emulsion IV bolus
• B. For nonlipophilic overdoses only; 2 mL/kg
• C. For all overdoses; 0.5 mL/kg
• D. Not indicated in overdose

Answer: (A)

Lipid emulsion therapy is used when a toxin is highly lipophilic because the administered lipid creates an intravascular lipid phase that binds and sequesters lipophilic drugs, reducing their distribution to target organs like the heart and brain and helping restore function in severe cardiotoxicity. It is not a universal antidote and is not indicated for overdoses caused by nonlipophilic drugs or for all overdoses.

For adults, a common initial bolus is 1.5 mL/kg of a 20% lipid emulsion given intravenously. This bolus is usually followed by a controlled infusion (often started at about 0.25 mL/kg/min) and adjusted based on clinical response, with attention to total daily dosing limits. Monitoring for potential complications such as fat overload, pancreatitis, or interference with lab measurements is important as therapy proceeds.