Which of the following is not considered a high-alert medication?

Ibuprofen is indeed not considered a high-alert medication, which is why it is the correct answer. High-alert medications are those that have a higher risk of causing significant harm when they are misused or improperly administered. While warfarin, lidocaine, and insulin are commonly recognized as high-alert medications due to their potential to cause serious complications if errors occur, ibuprofen generally has a lower risk profile. It is an over-the-counter nonsteroidal anti-inflammatory drug (NSAID) used primarily for pain relief and anti-inflammatory purposes, and while it can have adverse effects, particularly when overdosed, it does not carry the same level of risk associated with dosing errors as the other medications listed. Understanding this distinction is critical for healthcare professionals to prioritize safety in medication administration.