Hydrocortisone is a steroid medication that helps reduce inflammation in the body and suppresses the immune system. It is commonly used to treat severe inflammatory conditions and helps manage sepsis (a serious blood infection) by controlling the body’s inflammatory response.

Fludrocortisone is a synthetic steroid medication that works similarly to natural hormones produced by the adrenal glands. It helps regulate salt and water balance in the body and is often used alongside other steroids to help maintain proper blood pressure and mineral balance, particularly in critically ill patients.

The trial compares these medications combined versus a placebo in patients with sepsis who are in intensive care units, focusing on how different patients respond to steroid treatment based on their individual immune responses.

Sepsis – A serious condition that occurs when the body’s response to infection causes injury to its own tissues and organs. It develops when the chemicals released into the bloodstream to fight an infection trigger widespread inflammatory responses throughout the body. This condition can lead to changes in body temperature, heart rate, breathing, and organ function. The body’s organs begin to work poorly as sepsis progresses, potentially causing alterations in mental status, breathing difficulties, and reduced urine output. Without proper immune system response, sepsis can progress to affect multiple organ systems.

Acute Respiratory Failure – A condition where the respiratory system fails in one or both of its gas exchange functions: oxygenation and carbon dioxide elimination. It develops when the respiratory system cannot maintain adequate oxygen levels in the blood or remove enough carbon dioxide from it. The condition can develop rapidly or gradually, causing shortness of breath, rapid breathing, and air hunger. It often requires mechanical support to help with breathing.

Shock – A critical condition where the body’s organs and tissues don’t receive adequate blood flow and oxygen. The condition causes blood pressure to drop significantly, leading to weakness, confusion, and organ dysfunction. As shock progresses, it can affect multiple body systems, causing various symptoms including rapid breathing, weak pulse, and cold, clammy skin.