Aspirin is an incredibly popular painkiller than can be picked up, in some form or another, in pharmacies all across the world. Unfortunately, it's also possible to ingest too much of it. This can occur due to a deliberate overdose, but many people just mistakenly take too much. This is particularly likely when taking several medications at once since aspirin is contained in many drugs. Taking too much aspirin can be serious, especially for older patients, and could demand the immediate attention of a medical professional.