The case report is presented of a ten-and-a-half year old boy with acute onset of confusion and visual hallucinations, subsequently confirmed to be due to hyoscine toxicity following ingestion of over-the-counter (OTC) travel sickness tablets. It is suggested that packs of such pills should carry a prominent cautionary label. A clear clinical history is very important - not only in aiding the differentiation of acute viral infections involving the central nervous system (such as acute encephalitis) from drug toxicity, but also in rationalising any further diagnostic investigations. The possible underlying reasons for drug ingestion in this case are discussed.
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