Is it harmful for my child to take Sirop Helixia Prospan 6 months after opening it?

It is generally safe to use Helixia Prospan syrup for up to 6 months after opening, as long as it has been stored properly and the expiration date has not passed. The vomiting may have been caused by the cough itself, not necessarily the syrup. It is important to follow the recommended dosage when administering the syrup. Helixia Prospan is considered a safe option for treating both dry and wet cough in children over 1 year old. The active ingredient ivy helps to thin mucus and soothe the cough. If you have any more questions, feel free to ask for further assistance.