Figure 1 Patient monitor showing tachycardia and hypoxia, with a pulse oximetry reading of 81%.

Figure 2 Patient’s energy drink bottle (left) and the bottle he ingested by mistake (right).

Figure 3 Patient’s arterial blood gas sample syringe.

A 49-year-old man presented to the emergency department (ED) with cyanosis and altered mental status. Emergency medical services reported that he was found unresponsive at a bar, hypotensive and hypoxic to 88%. In the ED, he remained confused and cyanotic. His tachycardia, tachypnea, and oxygen saturation did not improve despite supplemental oxygen ( Figure 1 ). He stated he “meant to drink [his] energy drink, but drank the wrong bottle” ( Figure 2 ). Physical examination revealed clear lung sounds and no cardiac murmur. Arterial blood gas testing ( Figure 3 ) confirmed the diagnosis.