The US, Canada, England, and most of Europe are beginning to embrace the use of dual biologics in Crohns disease. The FDA approved levels of a singular biological may have issues reigning in out-of-control cases of severe Crohns, and there have been tons of trials run in multiple university hospitals over the last 10 years showing that the dual biological combo can help in those instances.

That's exactly why his doctor wanted to do it, because it had worked in the past. This wasn't some insane lab experiment done by a fresh grad gastro doctor.