Using a spare medication vial to store multiple medications: a potentially fatal in-home medication error.

Patient and family medication administration mistakes can result in medication errors at home. This commentary describes the problem of "pill dumping," where patients combine their daily medicines into a spare vial. However, patients are at risk for mistakenly taking a vial of a single medication instead of their pill-dump vial and inadvertently overdosing. The authors suggest medication counseling and use of daily pill boxes as tactics to prevent this type of error.