Flying with Infliximab

Hey there! I’m flying from Portugal with 2 injection pens of infliximab (Remsima) in October and wondering if any one might had a similar situation. Staying for just 2 weeks.
Did you had to have the original hospital prescription translated?
Did you have to bring some sort of medical letter to attest the need of that medication?
Do you have to declare it prior to your arrival or just when you land?
Many thanks!

by aclautorres