W00-X59: Other external causes of accidental injury

X40-X49: Accidental poisoning by and exposure to noxious substances

Accidental poisoning by and exposure to noxious substances includes a wide range of conditions caused by unintended ingestion, inhalation, or contact with harmful substances. These substances could include household chemicals, industrial compounds, certain plants, medicines, alcohol, drugs, gases, and vapors among others. Transmission mostly occurs through accidental ingestion, skin contact, or inhalation, typically in the home or workplace. Symptoms can vary greatly based on the substance involved, but may include nausea, vomiting, stomach pain, difficulty breathing, dizziness, or changes in behavior. If left untreated, these conditions can progress to more serious complications, such as damage to the heart, lungs, liver, kidneys or brain. Also, it's important to mention that exposure doesn't always lead to an immediate reaction, some substances can cause harm over a long period of time leading to chronic conditions.