Other Information: Each Caplet Contains: sodium 21 mg. Store at 68-77 degrees F (20-25 degrees C). Avoid high humidity and excessive heat above 104 degrees F (40 degrees C). Misc: Naproxen sodium tablets/220 mg each. Pain reliever/fever reducer (NSAID). Strength to last 12 hours. Caplets (Capsule shaped tablets). Compare to Aleve active ingredient (This product is not manufactured or distributed by Bayer HealthCare LLC, distributor of Aleve). Quality guaranteed. Gluten free. Questions or comments? 1-888-423-0139.