Id say stelera aka ustekinumab also, however they say the 1st biologic is the best after this they tend to not work as well, that makes it not so easy for us as a crohns patient as in my eyes we want the most effective medicine with the least side effects, there are more new meds coming, but what to give and in what order is going to be a real problem. and not being able to swap and change meds and being stuck on them in fear of them wearing of and generating antibodies at present.
And i think if your in trouble and having a flair you do not have time on your side, so they will go to what they know and what they trust is most powerful and of course this has most side effects.
There are people trying to work out ways to test patients for the best medicine before its given, i think it will happen but weather its in 5 years or 150 years i do not know.
And a cure could even come before this point.
But in terms of side effects stelera aka ustekinumab is a fairly groundbreaking med to date similar power to infleximab and least side effects from all meds.