DioraHydrate Effervescent Tab 20. DioraHydrate Blackcurrant Effervescent Tablets contain a scientifically calculated amount of electrolytes and carbohydrates for active hydration in a range of situations such as hot days, whilst travelling and during/after exercise.. DioraHydrate Blackcurrant Effervescent Tablets are free from gluten, lactose and colourings.. Do not exceed the recommended daily dose.. This product should not be used as a substitute for a varied diet. It is important to have a varied and balanced diet and a healthy lifestyle. Do not use this product if you are allergic to any of its ingredients.. This product may not be suitable for people with diabetes/on low sodium diets. Please consult your doctor before taking this product.