Synflex Naproxen Sodium Topical Gel 50g — RxHow Synflex Gel 50G with Naproxen Sodium Works for Pain Relief Synflex Gel 50G contains Naproxen Sodium, an anti inflammatory compound that works when applied topically. It helps reduce inflammation, muscle pain, and joint pain by blocking pain causing chemicals in the affected area. Key Benefits of Using Synflex Gel 50G Naproxen Sodium provides targeted relief for muscle and joint pain. Ideal for reducing inflammation and swelling in localized areas.