Posted in Kunsthaus Zurich (CH) Naproxen: Uses, Dosage, Side Effects, Warnings – Drugs.com July 18, 2026 Common naproxen side effects may include indigestion, heartburn, stomach pain, nausea, headache, dizziness, drowsiness, bruising, itching, rash, swelling or ringing in your ears. https://www.drugs.com/naproxen.html