Can I give my child Imupret N and Sinupert alternately?

Hi Is a child 6 years old can alternately give imupret and sinupret son has 3 almonds and imupret a little about shrinking and sinupret thinning discharge from the sinuses and my son has these secretions that flow down the back wall of his throat. The worst thing is at night you can hear this tonsil and the secretion that flows down the back wall of his throat because sometimes he coughs up as he flows.