Taking aspirin in safe doses generally has few side effects, but an overdose can have many adverse consequences, including irritation of the gastrointestinal mucosa by large amounts of the drug, causing stomach bleeding or gastric ulcers. Moreover, large amounts of aspirin can also lead to severe inhibition of platelets and cause bleeding, which may be bleeding from the skin mucous membranes, such as nosebleeds, gum bleeds or blood in urine or stool, but more seriously, it may cause brain bleeding, and once symptoms such as aphasia and hemiplegia occur, a head CT examination should be performed promptly to prevent this situation. Heavy use of aspirin may also lead to sudden damage to liver and kidney functions, and even neurological symptoms, with some people experiencing dizziness, headache, tinnitus or nervous confusion or even coma.