COSENTYX is a medicine that affects your immune system. COSENTYX may increase your risk of having serious side effects such as:

Infections

COSENTYX may lower the ability of your immune system to fight infections and may increase your risk of infections, sometimes serious.

• Your doctor should check you for tuberculosis (TB) before starting treatment with COSENTYX.
• If your doctor feels that you are at risk for TB, you may be treated with medicine for TB before you begin treatment with COSENTYX and during treatment with COSENTYX.
•  Your doctor should watch you closely for signs and symptoms of TB during treatment with COSENTYX. Do not take COSENTYX if you have an active TB infection.

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Before starting COSENTYX, tell your doctor if you:

• are being treated for an infection
• have an infection that does not go away or that keeps coming back
• have TB or have been in close contact with someone with TB