The dosage of Cosentyx (secukinumab) is not directly affected by a patient's weight. The recommended dose for adult patients with plaque psoriasis, psoriatic arthritis, or ankylosing spondylitis is 300 mg, administered as a subcutaneous injection, initially, followed by 300 mg every 4 weeks [3]. However, for patients with a body weight of 100 kg or greater, a dose of 300 mg every 2 weeks may be considered [3]. This suggests that while weight is taken into account when determining the dosing frequency, it does not alter the absolute dosage of Cosentyx [3].

It is important to note that the prescribing information for Cosentyx recommends that the drug be administered by a healthcare professional [2]. Additionally, the drug's patent information indicates that it is available in both pre-filled syringes and autoinjectors, making it easier for patients to self-administer the drug at home [1].

In summary, while patient weight can influence the dosing frequency of Cosentyx, it does not directly affect the dosage. The recommended dose for adult patients is 300 mg, administered either every 2 or 4 weeks, depending on the patient's weight and other factors.

Sources:

[1] <https://www.drugpatentwatch.com/p/biologics/tradename/COSENTYX>
[2] <https://www.novartis.com/us-en/sites/novartis_us/files/cosentyx.pdf>
[3] <https://www.cosentyx.com/plaque-psoriasis/treatment-dosing>