AbbVie (NYSE:ABBV) has notched a new approval for the Janus kinase 1 (JAK) inhibitor Rinvoq (upadacitinib) for ankylosing spondylitis, an inflammatory type of arthritis affecting the spine. The drug was first approved for treating rheumatoid arthritis in 2019. Indications followed for psoriatic arthritis, atopic dermatitis and ulcerative colitis. The ankylosing spondylitis indication is limited to…