Final answer:
Continuing to take Advil because it alleviates headaches is an example of using OTC pain relievers for self-medication.
Step-by-step explanation:
Continuing to take Advil because it alleviates headaches is an example of using over-the-counter (OTC) pain relievers for self-medication. Ibuprofen, marketed under the brand name Advil, is a nonsteroidal anti-inflammatory drug (NSAID) and analgesic that can help reduce pain and inflammation, including headaches. It is important to note that while OTC pain relievers like Advil can provide temporary relief, it is always recommended to consult with a healthcare professional for chronic or severe pain.