Background: Heparin is the oldest anticoagulant used in clinical medicine.Heparin has been studied for various applications and modifications.Gram-negative bacteria are among the most important public health problems in the world due to their high resistance to antibiotics.Methodology: A narrative review was carried out through various databases from January 2012 to December 2021; the search and selection of articles was carried out in journals indexed in English.The following were used as keywords: Heparin, sepsis, Gram negative.Results: Key factors in the development of sepsis include the release of pro-inflammatory mediators, diffuse endothelial injury, and procoagulant reactions, followed by organ dysfunction, taking into account that proinflammatory mediators activate coagulation.Heparin is a glycosaminoglycan with anticoagulant properties and anti-inflammatory effects.Conclusions: This review offers updated information on the therapeutic role of heparin in patients who develop sepsis after infection with Gramnegative bacteria.