Which best describes a contraindication? a. a secondary response to a drug b. a factor that makes using a drug dangerous c. a harmful dose of a drug d. an unexpected reaction to a drug

A contraindication is best described as a factor that makes using a drug dangerous (b). This could mean certain medical conditions, other medications, or specific patient characteristics that could lead to serious adverse effects if the drug is administered. Think of it as a big red stop sign saying, "Whoa there, not a good idea!" In the world of medicine, knowing contraindications is crucial for safety. For example, certain pain relievers might be harmful to someone with kidney issues. So, always check with a healthcare professional before mixing medications or if you have any underlying health conditions. Your health deserves that extra caution!