Erelzi is a prescription medicine used to treat autoimmune diseases such as rheumatoid arthritis, plaque psoriasis, psoriatic arthritis, and ankylosing spondylitis. It contains etanercept, a tumor necrosis factor (TNF) inhibitor that reduces inflammation by targeting overactive immune responses. Available as prefilled pens or syringes, Erelzi offers an effective, biosimilar alternative to Enbrel, delivering reliable results with proven safety.