Cosentyx is a biologic medicine that suppresses the immune system in order to treat psoriatic arthritis, ankylosing spondylitis, and psoriasis. Cozentyx works by blocking interleukin-17 (IL-17), a signalling protein (cytokine) that regulates the immune system and is related to the body’s inflammatory response. Taking Cosentyx Cosentyx is available as a subcutaneous (under the skin) injection.

Cosentyx is available as a subcutaneous (under the skin) injection.

Cosentyx comes as a pre-filled syringe that a patient takes once a month. When you start taking Cosentyx, you will get a weekly injection for the first five weeks and then once a month after that. The normal dose of Cosentyx is either 150 or 300 mg and is based on body weight.