Final answer:
Ipecac syrup, an OTC medication, requires a special warning to be used only under healthcare provider guidance to prevent accidental overdoses and other serious health risks.
Step-by-step explanation:
The special Over-The-Counter (OTC) warning requirement for Ipecac syrup is that it should not be used without specific direction from a healthcare provider. Due to its nature and severe adverse effects, including the risk of accidental overdoses and the potential for serious harm, the medication must be used with caution. Since OTC drugs like Ipecac syrup can be obtained without a prescription, it is imperative that the consumers adhere strictly to the guidelines provided by the FDA to avoid potential health risks.