Cosentyx is a medication used to treat psoriasis, psoriatic arthritis, and ankylosing spondylitis. The recommended dosage of Cosentyx varies by age and medical condition.

For plaque psoriasis, the recommended starting dose for adults is 300 mg given as two 150 mg subcutaneous injections at weeks 0, 1, 2, 3, and 4 followed by 300 mg every 4 weeks. For children aged 6 years and older, the recommended dose is based on body weight. Children weighing less than 50 kg should receive 75 mg, and those weighing 50 kg or more should receive 150 mg, given as two subcutaneous injections at weeks 0, 1, 2, 3, and 4 followed by 75 mg or 150 mg every 4 weeks, respectively [2].

For psoriatic arthritis, the recommended starting dose for adults is 300 mg given as two 150 mg subcutaneous injections at weeks 0, 1, 2, 3, and 4 followed by 300 mg every 4 weeks. For ankylosing spondylitis, the recommended starting dose for adults is 150 mg given as two 75 mg subcutaneous injections at weeks 0, 1, 2, 3, and 4 followed by 150 mg every 4 weeks [2].

It is important to note that the recommended dosage may be adjusted based on individual patient response and medical condition. Patients should consult with their healthcare provider for personalized dosing recommendations [3].

Sources:
[1] https://www.drugpatentwatch.com/p/biologics/tradename/COSENTYX
[2] https://info.cosentyx.com/plaque-psoriasis/dosing
[3] https://www.drugs.com/dosage/cosentyx.html