Paracetamol administration is associated with hypotension in the critically ill

Area of Science:

• Pharmacology
• Critical Care Medicine
• Clinical Pharmacy

Background:

• Anecdotal reports from intensive care unit (ICU) nursing staff suggested a link between paracetamol administration and hypotension.
• A need existed to objectively assess the association between paracetamol and blood pressure changes in critically ill patients.

Purpose of the Study:

• To investigate the temporal association between paracetamol administration and blood pressure fluctuations in critically ill patients.
• To quantify the changes in systolic arterial pressure (SAP) and mean arterial pressure (MAP) following paracetamol administration.

Main Methods:

• An observational study was conducted involving 37 critically ill patients in an ICU.
• A 1-gram dose of paracetamol was administered orally or via feeding tube.
• Blood pressure (SAP and MAP) was monitored at regular intervals for two hours post-administration, with baseline measurements taken prior.

Main Results:

• A statistically significant reduction in both SAP and MAP was observed over the two-hour observation period (p < 0.0001).
• Average reductions were approximately 10% for SAP and 7% for MAP.
• Maximum recorded falls were substantial, reaching 36% for SAP and 34% for MAP.

Conclusions:

• Paracetamol administration is associated with significant hypotension in critically ill patients.
• While paracetamol can help control fever and reduce oxygen demand, its potential to cause significant blood pressure drops must be carefully considered.
• Clinicians should balance the antipyretic benefits of paracetamol against the risk of hemodynamic compromise in the ICU setting.