How soon can you get allergy test results for Cosentyx?
Cosentyx (secukinumab) requires a hypersensitivity test before the first dose to check for allergic reactions. This is a skin prick or intradermal test done by your doctor, typically in-office.[1] Results appear within 15-30 minutes, allowing immediate decision on proceeding with the injection.[2]
What does the Cosentyx allergy test involve?
The test uses a diluted Cosentyx solution injected or pricked into the skin on your forearm. Your doctor watches for redness, swelling, or itching at the site. No reaction means you can get the full dose right away; a positive reaction delays or skips treatment.[1][3]
Why is the allergy test needed before starting Cosentyx?
Cosentyx, an IL-17 inhibitor for psoriasis, psoriatic arthritis, or ankylosing spondylitis, can trigger serious allergic responses in some patients. The test catches this early, as full anaphylaxis risk is low but real—about 1-2% in trials.[4]
What if the test is positive?
A positive result (wheal >5mm or other reaction) means no Cosentyx dose that day. Your doctor may try alternatives like Dupixent or Tremfya, or monitor for future desensitization. Repeat tests aren't standard.[3]
How common are false positives or negatives?
False positives occur in under 5% of cases, often from skin sensitivity rather than true allergy. Negatives are reliable, but monitor for delayed reactions post-first dose.[2][4]
Where to get tested and what it costs
Done at dermatologist or rheumatologist offices, or infusion centers. Covered by most insurance with prior auth; out-of-pocket ~$50-200 without.[5] No at-home kits exist.
[1]: Cosentyx Prescribing Information (Novartis)
[2]: American Academy of Dermatology Guidelines
[3]: FDA Label for Secukinumab
[4]: ClinicalTrials.gov Studies on Secukinumab Hypersensitivity
[5]: Drugs.com Cost Data