Antifreeze is a liquid that prevents radiators in cars from freezing or overheating. It is also known as an engine coolant. As our body absorbs antifreeze, the chemical turns into other toxic substances such as glycolaldehyde, glycolic acid, glyoxylic acid, acetone, formaldehyde. According to the ATSDR (Agency for Toxic Substances and Disease Registry), early symptoms can appear as early as 30 minutes after the introduction of antifreeze into the body, and more severe symptoms appear about 12 hours after the introduction of antifreeze into the body. Organ damage can occur within 24 to 72 hours. The speed at which symptoms develop mostly depends on the amount of antifreeze that a person has ingested. It is possible for a person to lose consciousness or fall into a coma. In my paper, I will present the case of a 65-year-old man who, accompanied by the HMP, was brought to the OHBP fully conscious after a suicide attempt by drinking, as he states, 0.7 L of antifreeze, followed by another 2 L of beer and 1 L of mineral water, and due to in severe general condition is admitted to the ICU (Intensive Treatment Unit). The paper presents the symptoms that developed from the moment of entering the hospital, the diagnosis and therapeutic approach that was carried out during the hospitalization, and the importance of the nurse's role in the entire health care process.