Medicinal: each sachet contains: sodium chloride 2.6 mg/ml; potassium citrate (monohydrate) 2.2 mg/ml; citric acid (anhydrous) 4.4 mg/ml; glucose (anhydrous) 14.5 mg/ml. In 4.9 g (average mass powder) made up to 200 ml. non-medicinal (in alphabetical order): natural red colour, natural apple flavour, natural blackcurrant flavour, sucralose. This product is free from sodium saccharine, gluten, lactose and low in carbohydrates (glucose).
Manufacturer likely did not include an allergen statement; however, please double-check the product packaging and/or contact the manufacturer if you have a severe food allergy.