# A Practical Guide to the Roles of Procalcitonin Measurement in Patients with Acute Pancreatitis

## TL;DR

This paper reviews how measuring procalcitonin can help manage acute pancreatitis by predicting severity and guiding antibiotic use.

## Contribution

The paper provides a practical guide on using procalcitonin levels to guide antibiotic therapy in acute pancreatitis.

## Key findings

- Elevated procalcitonin levels indicate severity and necrosis in acute pancreatitis.
- A procalcitonin level >1 ng/mL supports starting antibiotic therapy in acute pancreatitis.
- Procalcitonin can guide antibiotic use when microbiological cultures are negative.

## Abstract

Background/Objectives: This review is a concise summary of the current roles and indications for procalcitonin measurement in the management of patients with acute pancreatitis. Methods: The National Library of Medicine’s PubMed database for the period 1 January 2000 to 27 November 2025 was interrogated using the keywords “procalcitonin” and “acute pancreatitis”. Articles on gut dysbiosis in acute pancreatitis, procalcitonin and its role as a predictor of disease severity, a marker of pancreatic necrosis and a guide to antibiotic therapy in acute pancreatitis were retrieved. Results: Persistently elevated procalcitonin levels are indicators of disease severity and necrosis in acute pancreatitis. In the setting of acute pancreatitis with raised inflammatory markers, a procalcitonin level >1 ng/mL has evidentiary proof for use as an indicator for starting antibiotic therapy. Conclusions: In current practice, in patients with acute pancreatitis and raised inflammatory markers but without positive microbiological cultures, a procalcitonin level >1 ng/mL can be used as an indicator for starting antibiotic therapy.