For how many days to give Sumamed to the child?

The length of treatment is determined by the doctor. Usually, he writes the size of the antibiotic package that is enough for the entire treatment, if he wants it to be shorter - he makes an appropriate annotation on the prescription, e.g. 4 ml per day for "x" days. The dosage can be checked on the prescription. If in doubt, it is best to contact the person who examined the child and issued a prescription for Sumamed. I enclose additional information about Sumamed - prescription products can be booked at WherePoLek and pick up stationary upon presentation of the prescription: https://www.gdziepolek.pl/produkty/75416/sumamed-granulat-do-wytworzenia-zawiesiny/apteki/w-warszawie