Pill Imprint NPS 550
This blue elliptical / oval pill with imprint NPS 550 on it has been identified as: Anaprox-ds naproxen sodium 550 mg.
This medicine is known as Anaprox-DS (generic name: naproxen). It is available as a prescription and/or OTC medicine and is commonly used for Ankylosing Spondylitis, Aseptic Necrosis, Back Pain, Bursitis, Chronic Myofascial Pain, Costochondritis, Diffuse Idiopathic Skeletal Hyperostosis, Dysautonomia, Fever, Frozen Shoulder, Gout, Acute, Headache, Juvenile Rheumatoid Arthritis, Muscle Pain, Neck Pain, Osteoarthritis, Pain, Period Pain, Rheumatoid Arthritis, Sciatica, Spondylolisthesis, Tendonitis.