Naproxen is used to reduce fever and to relieve mild pain from headaches, muscle aches, arthritis, menstrual periods, the common cold, toothaches, and backaches. Naproxen is in a class of medications called NSAIDs.
Common side effects
Dryness in mouth, Headache, Heartburn, Abdominal pain, Nausea, Vomiting, Flatulence, Constipation, Diarrhea, Dyspepsia, Epigastric pain, Dark colored stool, Hematemesis (vomiting blood), Ulcerative stomatitis, Exacerbation of colitis, Crohn's disease, Dizziness, Drowsiness, Itching, Skin eruptions, Ringing in ear, Edema (swelling), Breathlessness