Final answer:
The most common complication associated with hydrocarbon intoxication is pneumonitis, an inflammation of the lung tissue that can lead to severe respiratory issues.
Step-by-step explanation:
The most common complication associated with hydrocarbon intoxication, particularly with substances like paint thinner, is pneumonitis. This condition is an inflammation of the lung tissue that can occur after aspiration of chemicals. The latent period of 4-8 hours after exposure can progress to flu-like symptoms, which include nausea, cough, dyspnea, and eventually pulmonary edema. The patient in the question developed severe abdominal pain, nausea, and vomiting several hours after aspiration, which is consistent with the progression of symptoms following hydrocarbon inhalation.