Redoxon Effervescent Tablets, Double Action with Vitamin C and Zinc. Features: Helps prevent colds Helps Reduce the Length and Severity of Colds 10 oranges for the amount of vitamin C in one tablet Helps support the immune system Method of application: for adults and adolescents. 1 tablet daily. Dissolve the effervescent tablet in ½ cup cold water. Volume: 15 tablets. Tags: pharmacy, treatment