Final answer:
Ibuprofen, naproxen, and aspirin are the OTC nonsteroidal anti-inflammatory drugs (NSAIDs). They can be purchased without a prescription and are used to relieve pain, reduce fever, and reduce inflammation.
Step-by-step explanation:
The nonsteroidal anti-inflammatory drugs (NSAIDs) that can be purchased over the counter (OTC) are ibuprofen, naproxen, and aspirin. OTC ibuprofen is available as brands like Advil and Motrin, while OTC naproxen is available as Aleve. These medications are commonly used to relieve pain, reduce fever, and reduce inflammation.