Can a 7 year old be given Sambucol Junior and Groprinosin?

It is not recommended to combine preparations containing vitamin C and Groprinosin. Sambucol Junior contains this vitamin, so it is advisable to postpone its use and give it to your child only after the end of the Groprinosin treatment.
If your doctor has advised you to, keep the interval between Sambucol and Groprinosine as long as possible.

More here:

https://www.gdziepolek.pl/opinie-i-pytania/77502/ascorvita-czy-10-ml-groprinosin-forte-3-razy-dziennie-to-dobra-dawka-dla-doroslych-i-czy-mozna-laczyc

You can replace Sambucol with a preparation without vitamin C or with less vitamin C.

Here you can compare the prices of this type of products in online pharmacies and make an order with home delivery or pickup at the pharmacy:

https://www.gdziepolek.pl/produkty/97421/zatogrip-junior-6-syrop/apteki

https://www.gdziepolek.pl/produkty/88861/pelavo-nos-i-zatoki-syrop/apteki

In cities such as Warsaw, Wroclaw, Łódź, Krakow, Katowice, Lublin, Poznan or Bialystok, products can be ordered with instant delivery even in 1 hour thanks to the Wolt Drive service - check if the service is available in your location: https://www.gdziepolek.pl/koszyk/szybka-dostawa?src=zf