Cosentyx is a biologic drug that is used to treat various autoimmune diseases, including psoriasis, psoriatic arthritis, and ankylosing spondylitis. According to the drug's manufacturer, Novartis, Cosentyx has been shown to be effective in clinical trials for up to five years [2]. However, there is limited information available on the long-term effectiveness of the drug beyond this timeframe.

Cosentyx works by targeting a specific protein in the body that is involved in inflammation and immune system activity. By blocking this protein, Cosentyx can reduce the symptoms of autoimmune diseases and improve patients' quality of life [3]. The drug is administered via injection, either by a healthcare professional or by the patient themselves.

One potential concern with long-term use of Cosentyx is the development of antibodies against the drug. Antibodies are proteins that the body produces in response to foreign substances, such as drugs. If a patient develops antibodies against Cosentyx, it may reduce the drug's effectiveness over time [1]. However, studies have shown that the incidence of antibody development is relatively low with Cosentyx [3].

Another consideration with Cosentyx is the cost of treatment. The drug is expensive, with a list price of over $5,000 per month [2]. However, many insurance plans and patient assistance programs may cover some or all of the cost of the drug.

In summary, while there is limited information available on the long-term effectiveness of Cosentyx, clinical trials have shown that the drug can be effective for up to five years. Potential concerns with long-term use include the development of antibodies against the drug and the high cost of treatment. Patients should discuss the risks and benefits of Cosentyx with their healthcare provider to determine if it is the right treatment option for them.

Sources:
[1] https://www.drugpatentwatch.com/p/biologics/tradename/COSENTYX
[2] https://www.cosentyx.com/treatment-cost
[3] https://www.medicalnewstoday.com/articles/326632