Can Cosentyx (secukinumab) cause feeling hot, headaches, or fatigue?
Yes. Cosentyx can cause systemic side effects in some people, and “feeling hot” (often meaning flushing, chills, or a feverish sensation) can happen alongside other reactions. Headache and fatigue are also reported side effects.
Because “feel hot” can also signal an infection, it matters whether you have a true fever and any other symptoms (cough, sore throat, burning with urination, worsening flu-like symptoms). If you’re actually running a temperature, contact a clinician promptly rather than assuming it’s just a medication reaction.
What does “feel hot” on Cosentyx usually mean?
Patients often describe “feeling hot” as:
- feeling flushed or overheated
- chills or a feverish sensation
- sometimes fever
Cosentyx affects the immune system, so any possible infection signs should be treated seriously. Fever with new or worsening symptoms is the main reason to seek medical advice while on biologics.
Are headaches and fatigue common with Cosentyx?
Headaches and fatigue are among the kinds of general side effects that have been reported with Cosentyx. If headaches are severe, persistent, or come with neurological symptoms (vision changes, weakness, confusion), or if fatigue is extreme, it’s worth checking in with your prescriber.
When should you get urgent help?
Get urgent medical care if you have:
- a confirmed fever (for example, 100.4°F / 38°C or higher) or shaking chills
- trouble breathing, chest pain, facial/lip swelling, or widespread hives
- signs of infection (severe sore throat, cough, painful urination, draining skin lesions)
- severe or sudden headache, fainting, or neurologic symptoms
What should you do right now if you feel hot plus headache/fatigue?
- Check your temperature if you can.
- Note timing relative to the injection dose (same day vs. days later).
- If you have fever or infection symptoms, contact your clinician for guidance.
- If symptoms are mild and you have no infection signs, still monitor closely and discuss at your next follow-up, especially if they keep returning after each dose.
Could it be something else (not Cosentyx)?
Yes. Headache and fatigue can come from many causes (viral illnesses, dehydration, poor sleep, stress, medication timing changes). For “feel hot,” distinguishing medication-related discomfort from an infection is the key step.
If you tell me a few details, I can narrow it down
What you’re experiencing will depend on timing and severity. If you share:
1) your temperature (if you checked),
2) when the symptoms started after your last injection,
3) whether you have any cold/infection symptoms,
4) your dose schedule (weekly/every 2–4 weeks),
I can help you think through how likely it is to be medication-related vs. something that needs prompt evaluation.