A 20-year-old woman admitted with an aspirin overdose was encephalopathic and was intubated for airway protection. Under sonographic guidance, a right internal jugular central venous catheter was inserted for volume resuscitation. She was agitated and required treatment with a propofol infusion. Her salicylate levels improved and she was successfully extubated 12 h after intubation. One day later she developed severe dyspnoea and a right-sided pleural effusion and required immediate reintubation. The effusion was drained and was consistent with a chylothorax. A CT scan of the chest revealed that the central venous catheter traversed the mediastinum with its tip in the right pleural space. The propofol infusion was draining into the pleural space. A video-assisted thoracoscopic surgery was performed to drain the pleural effusion and repair the punctured vessel. She was extubated within a day and discharged home 1 day later without any pleural fluid.