The medical poison symbol is the skull and crossbones.
This symbol serves as a universally recognized warning indicating that a substance is poisonous or toxic. Exposure to substances marked with this symbol, through ingestion, inhalation, skin contact, or other means, can cause serious health problems or even death. It is crucial to handle any substance bearing this symbol with extreme caution and follow appropriate safety guidelines.
The skull and crossbones visually communicates the danger of the substance, prompting individuals to take necessary precautions.