Diva OD 500 and Dayo OD 500 both contain the same medicine, Divalproex Sodium 500 mg, and are used to treat conditions. They usually work the same, but some people may feel different side effects or results with each brand. What works well for one person might not work the same for another. It’s essential to ask your doctor which one is better for you, and you should never switch between brands on your own without medical advice. Always follow your doctor’s instructions for safe treatment.