Standard Cosentyx Starting Dose for Ankylosing S spondylitis
Cosentyx (secukinumab) starts with a 150 mg subcutaneous injection at weeks 0, 1, 2, 3, and 4, followed by 150 mg every 4 weeks.[1][2]
How It Differs from Psoriatic Arthritis Dosing
Psoriatic arthritis uses the same loading doses (150 mg at weeks 0-4) and maintenance (150 mg every 4 weeks), with an optional 300 mg loading for patients over 90 kg or with co-existing moderate-to-severe plaque psoriasis.[1][3] Ankylosing spondylitis sticks to 150 mg throughout, without the 300 mg option.
Comparison to Plaque Psoriasis Dosing
Plaque psoriasis requires 300 mg at weeks 0, 1, 2, 3, and 4, then 300 mg every 4 weeks (or 150 mg for some milder cases). Ankylosing spondylitis halves the dose to 150 mg from the start, reflecting lower body surface area needs in axial conditions.[1][2]
Differences from Other Indications Like Non-Radiographic Axial Spondyloarthritis
Non-radiographic axial spondyloarthritis follows the exact ankylosing spondylitis schedule: 150 mg loading then every 4 weeks. Both are grouped under axial spondyloarthritis with identical dosing.[1]
Adjustments for Weight or Response
No weight-based adjustments for ankylosing spondylitis; all adults start at 150 mg. If inadequate response after 16-24 weeks, prescribers may increase to 300 mg every 4 weeks, though this is off-label and less common than in psoriasis.[2][4] Pediatric use (ages 2+) is weight-tiered but not approved for ankylosing spondylitis.
Administration Options
Prefilled syringe, autoinjector, or prefilled pen; self-administered after training. Sites rotate (thigh, abdomen, upper arm). No IV formulation for ankylosing spondylitis—unlike initial approval pathways.[1][2]
[1]: Cosentyx Prescribing Information (Novartis, 2023)
[2]: FDA Label for Secukinumab
[3]: American College of Rheumatology Guidelines for Axial Spondyloarthritis
[4]: Drugs.com Cosentyx Dosage Guide