Naproxen started out prescription only with huge warnings about drinking a lot of water with each dose. It knocks out back pain like nothing else.
Once it became available over the counter under the name Aleve.... most people didn't realize how powerful the drug is, in it's ability to damage the kidneys. Most people think it's as safe as aspirin because they don't know.
After all, all of those happy commercials with people laughing and enjoying life! Surely they wouldn't sell something to us that could permanently damage us for life! sarc