effects have included inability to concentrate , depression , dream abnormalities , insomnia , malaise , myalgia , muscle weakness , aseptic meningitis , and cognitive dysfunction . REFERENCE + Product Information. Anaprox (naproxen). Anonymous Roche Laboratories, Nutley, NJ. PROD; Product Information. Naprosyn (naproxen). Anonymous Syntex Laboratories Inc, Palo Alto, CA. PROD;