Since these drugs have different mechanisms of action, such a combination does not pose a threat to the health or life of the child. Nevertheless, you should avoid combining these drugs, as they have similar indications for use - they inhibit dry cough. The butamirate in Sinecod will stop the cough reflex, while the levodropropisin active substance in Levopront will stop bronchospasm. Both of these effects lead to a reduction in dry cough. The best solution seems to be the use of one of these drugs, and only when this one is not effective, you can replace it with the other. Here you can compare the prices of these drugs in online pharmacies and order the drug with home delivery or collection at the pharmacy: https://www.gdziepolek.pl/produkty/92559/levopront-syrop/apteki https://www.gdziepolek.pl/produkty/71318/sinecod-krople/apteki I enclose a link to a helpful entry: https://www.gdziepolek.pl/kategorie/kaszel-suchy