IL37 and Colonic diverticula: Infection is the most common adverse reaction as stated in the instructions and Some people have serious infections while taking IL-23 and IL-12/23 inhibitors including diverticulitis, cellulitis, appendicitis, cholecystitis, sepsis, gastroenteritis, osteomyelitis, viral infections and urinary tract infections etc. Some people had to be hospitalized for treatment of their infection [25].