Cosentyx (secukinumab) is a biologic drug used to treat autoimmune diseases such as psoriasis, psoriatic arthritis, and ankylosing spondylitis [1]. It works by blocking a protein called interleukin-17A, which is responsible for inflammation in the body [2].

According to Drugs.com, Cosentyx does weaken the immune system, which can increase the risk of infections [3]. However, the drug's impact on the immune system over time is not fully understood. The website notes that patients taking Cosentyx should be monitored for signs of infections, and that patients with active infections should not take the drug [3].

The Cosentyx website provides additional information on the drug's safety and side effects. It notes that patients taking Cosentyx may have an increased risk of infections, including serious infections such as tuberculosis and invasive fungal infections [4]. The website also advises patients to contact their doctor if they experience symptoms of an infection, such as fever, cough, or flu-like symptoms [4].

In addition to the risk of infections, Cosentyx may also cause other side effects, including allergic reactions, gastrointestinal problems, and changes in liver function [4]. The website advises patients to talk to their doctor about any concerns they have about the drug's side effects [4].

In conclusion, Cosentyx weakens the immune system, which can increase the risk of infections. While the drug's impact on the immune system over time is not fully understood, patients taking Cosentyx should be monitored for signs of infections and should contact their doctor if they experience symptoms of an infection. The drug may also cause other side effects, and patients should talk to their doctor about any concerns they have.

Sources:
[1] https://www.drugpatentwatch.com/p/biologics/tradename/COSENTYX
[2] https://www.drugbank.ca/drugs/DB09035
[3] https://www.drugs.com/medical-answers/cosentyx-weaken-immune-system-3558003/
[4] https://www.cosentyx.com/safety-and-side-effects