diclofenac sodium topical gel keeps you in control of your arthritis pain. dr. reddy's diclofenac gel has a triple effect that relieves arthritis pain, improves mobility and reduces stiffness to provide prescription strength relief over the counter. containing diclofenac sodium, this topical nsaid penetrates deep to deliver powerful relief of arthritis pain in your hands, wrists, elbows, feet, ankles and knees. use for up to 21 days.