from wiki I got:
Brazil: Mesalazina, Mesalazina Enema, Mesacol, Mesacol MNX, Asalit, Chron-asa 5, Pentasa, Pentasa Enema, Mesaneo
If you are lucky you can just take in the US package to the pharmacy and they will sell it to you straight away. Sometimes they have a book of equivalents. I always ask if there is a cheaper brand (or generic) than the one they first show me.
Where I live there was recently a big push to require real, from the doctor, prescriptions for antibiotics, but it seems as though that law didn’t take.