Ibuprofen Ibuprofen is a non-steroidal anti-Inflammatory drug (NSAID) available over the counter as tablets or gels. Learn how it’s used, risks and side-effects. Iloprost Iloprost is a drug that can help prevent your condition causing damage to your body. It can sometimes cause side effects, but many of these are rare or uncommon. Infliximab Infliximab is used to treat rheumatoid arthritis, psoriatic arthritis and axial spondyloarthritis including ankylosing spondylitis. Intravenous Immunoglobulin (IVIg) Intravenous immunoglobulin (IVIg) is used to treat polymyositis and dermatomyositis. Learn how it works, how long it takes, risks and side-effects. Ixekizumab Ixekizumab is used to treat psoriasis and psoriatic arthritis. Find out how long it takes to work, how it’s taken and possible side-effects.