Estacel is a brand name for the medication generic name Etanercept, which is a biological drug used to treat autoimmune conditions such as rheumatoid Arthritis, psoriasis, and ankylosing spondylitis. It functions as a tumor necrosis factor (TNF) inhibitor, helping to reduce inflammation and halt disease progression. Estacel is typically administered via injection and may be prescribed for adults and children depending on the condition being treated. As with any medication, it is important to discuss potential side effects and contraindications with a healthcare provider.