Key Message
Ten randomized controlled trials and 4 non-randomized studies were identified regarding the clinical effectiveness of switching from reference to biosimilar adalimumab in adult or pediatric patients with rheumatoid arthritis, Crohn disease, ulcerative colitis, hidradenitis suppurativa, plaque psoriasis, or psoriatic arthritis. No evidence was identified regarding the clinical effectiveness of switching from reference to biosimilar adalimumab in adult or pediatric patients with uveitis or ankylosing spondylitis and in pediatric patients with polyarticular juvenile idiopathic arthritis.