A 60-year-old man in Seattle consulted ChatGPT for healthy alternatives to table salt and was later hospitalized with paranoia and hallucinations. He experienced auditory and visual hallucinations, was very thirsty, and feared drinking water offered by others. He went to an emergency department worried that his neighbor had poisoned him; vital signs and a neurological exam showed no immediate concerns. Blood tests revealed his chloride ion level was above the normal range, suggesting hyperchloremia, but further tests showed his blood was too negatively charged overall, indicating a negatively charged poison had built up too fast for his body to buffer. Doctors consulted poison control and diagnosed pseudohyperchloremia, where the chloride test erroneously detects another negatively charged ion. High-dose aspirin was ruled out, and bromide, a charged form of bromine, was identified as the culprit. The patient’s bromide levels were roughly 230 times higher than the normal range, leading to a diagnosis of bromide poisoning, or bromism, which can cause neurological symptoms such as hallucinations and paranoia.