I have travelled with three children , starting at 4 months .
I always bring what I use with them ( I'm not wild about experimenting with something new while away )
This included Baby Tylenol ( kids wake up with fevers at two am with no warning most times , who wants to find a drugstore at that time !?)
A decongestant ( the brand I used was Dimetapp but I don't think they make it anymore ) , if flying you do not want babies to scream from pain in their ears because they are a little stuffy , being stuffy makes the ears hurt ALOT more )
Baby Gravol .
Throw in some antiseptic creams and a few bandages .
If your child has specific health issues then you know what sort of stuff you give them for that ( constipation issues etc )
Be assured there is excellent medical care in Europe for anything more than a cold etc .