Side effects of naproxen and cephalexin together. Take Aleve with food or milk to . . What is the correct cephalexin . . . . . to give her both of them together? She . . . . ketoprofen (Orudis, Orudis KT, Oruvail), naproxen . . . Sulfamethoxazole (Septra, Bactrim) and Cephalexin (KeflexPrednisone safety decreases the chance for undesirable side effects. . . . the Z-pack and Aleve or Tylenol together? Yes. . Take amoxicillin until finished, naproxen with food . Learn about the prescription medi... more